Endemic Plant Species of Bolivia and Their Relationships with Vegetation

Mónica Moraes R., Carla Maldonado and Freddy S. Zenteno-Ruiz

### Abstract

The inventory of Bolivia's vascular plants lists 2402 endemic species (ca. 20% of 12,339 of native flora). Among angiosperms, there are 2263 species from 124 families and 641 genera, whereas among pteridophytes, there are 139 species from 16 families and 29 genera. Seven families with the greatest number of endemic species are Orchidaceae (418), Asteraceae (246), Bromeliaceae (147), Cactaceae (127), Poaceae (92), and Piperaceae (81). Cleistocactus and Puya have 14 and 55 endemic species, respectively, so representing 82.3 and 84.6% of the species in these genera. Bolivia's endemic species show distribution patterns associated with past geological events, orographic dynamics (of the Andes and in the Cerrado), as well as areas of diversification. Dry xeric and humid regions host local and regional endemics in specific families and biogeographic regions of high conservation importance. Humid montane forests in the Yungas and dry inter-Andean valleys are rich in endemic species with 51 and 22% of the total recorded in the respective regions. Nevertheless, there are still many lesser known geographical areas that may generate new information in the short and medium term. Only 165 endemic species (6.9%) have been evaluated for their conservation status following IUCN categories with 49% assessed as endangered (EN).

Keywords: angiosperms, humid montane forests, ferns, dry valleys, Cerrado

### 1. Introduction

The Bolivian biota and its endemicity are derived from the influence of four biogeographic provinces, the Amazonian, the Andes, the Gran Chaco, and the Cerrado, generating several encounters of mixed elements [1]. For example, in the mountains of the Eastern Cordillera with the mixture of Andean and Amazonian flora, while in the Pantanal area (SE Bolivia) where there are Amazonian, Chaco and Cerrado elements took place. Amazonia is found in the alluvial plain from center to the north of the country, the Andes in mountain ranges in the west side, Cerrado on Precambrian shield in the east (in which it is also circumscribed to the Chiquitanía), and the Gran Chaco on plains and Andean foothills in the south.

These four biogeographical provinces together with the physiography of Bolivia combine in general opportunities for isolation, speciation, and restricted distribution, especially in geological periods, such as the uplift of the Andes and the conformation of valleys [1–3]. The floristic elements of each biogeographic province derive from radiation and dispersion processes during geological ages, whose adaptation has been consolidated in current landscapes.

Endemic species in Bolivia are associated with a wide range of diverse habitats and originated from different processes that have modeled the natural landscape in the past, particularly in the montane formations lying on the Andean and Brazilian lithospheres, specifically the uplift of the central Andes [4] 18 million years ago in the west and the slow weathering of the Precambrian Brazilian shield in the east, for example, through three biogeographical models of speciation in central Andes: vicariance of Andean uplifts, dispersal during the Pleistocene, and vicariance in both eastern and western slopes during glacial periods [5]. The rocky outcrops exposed in the Cerrado (or "brasileño-paranaense") of Bolivia have been identified as centers of plant endemism, where microhabitats are formed with specific microclimatic conditions [6, 7].

In the present contribution, we update the record of endemic vascular plants of Bolivia and evaluate general striking features and patterns of endemic plants and their relationships with vegetation types of the country, as a baseline for further studies.

### 2. Methodology

A large part of the information collected in the country is concentrated in databases and botanical collections of the National Herbarium of Bolivia (acronym, LPB in the Index Herbariorum). Due to a constant communication with experts and specialists from different groups of plants, publications and other valid and current scientific denominations about recent taxonomic works are available. This support constitutes our main source of references. Recently, an intense data compilation process has resulted from the information gathered for the "Catálogo de las Plantas Vasculares de Bolivia," published in 2014 [8] which mainly continues to be updated in Tropicos (www.tropicos.org, revised until November 7, 2018), as well as in other recent publications. The botanical inventory of Bolivia has been documented based on 650,000 herbarium specimens. The distribution of the collections covers a higher density in regions of the eastern slopes of the Andes, which includes the humid forests and the fragmented forests of the dry inter-Andean valleys (Figure 1). Recent publications and taxonomic updates to the Bolivian flora of vascular plants were the basis for this work [9–17].

In the highlands of the Andes toward the southwest and also in ravines and hills of the eastern Andean mountains, Polylepis (Rosaceae) forests (Figure 2a) are found, which are considered to be the highest in the world. However, they have been excluded here as a major vegetation formation because they are distributed in both a fragmented and azonal pattern in different vegetation formations, such as montane forests, dry puna, and humid puna. Therefore, a slightly modified map according to two vegetational classifications [8, 18] was elaborated (Figure 3).

subsequently taken care of according to the biogeographical implications of the Bolivian flora. Finally, a number not exceeding to 200 endemic species occur in

According to the Bolivian plant checklist [8], there are four major geographical regions in Bolivia: the Andes, Altiplano, lowlands, and uncertain. However this is an arbitrary delimitation that does not recognize local differences. The Andes, for example, has an altitude range of 500–3500 m and includes the Yungueñan

"páramo" and both humid and dry forests in the Andean foothills. The Altiplano lies above 3500 m, whereas the lowlands include Amazonian rainforests, savannas, the Pantanal, and the Chaco xeric forest from 150 to 400 m, as well as the Precam-

uncertain vegetation formations.

Figure 1.

27

brian mountain ranges of 600–1200 m altitude.

Density cover of botanical collections in Bolivia at LPB (grid 5 5 km).

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

The consideration of the endemic species follows in relation to the vegetation formations in which they are represented, which allows an evaluation on the distribution and striking characteristics of the families represented. This information is

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 1. Density cover of botanical collections in Bolivia at LPB (grid 5 5 km).

subsequently taken care of according to the biogeographical implications of the Bolivian flora. Finally, a number not exceeding to 200 endemic species occur in uncertain vegetation formations.

According to the Bolivian plant checklist [8], there are four major geographical regions in Bolivia: the Andes, Altiplano, lowlands, and uncertain. However this is an arbitrary delimitation that does not recognize local differences. The Andes, for example, has an altitude range of 500–3500 m and includes the Yungueñan "páramo" and both humid and dry forests in the Andean foothills. The Altiplano lies above 3500 m, whereas the lowlands include Amazonian rainforests, savannas, the Pantanal, and the Chaco xeric forest from 150 to 400 m, as well as the Precambrian mountain ranges of 600–1200 m altitude.

These four biogeographical provinces together with the physiography of Bolivia combine in general opportunities for isolation, speciation, and restricted distribution, especially in geological periods, such as the uplift of the Andes and the conformation of valleys [1–3]. The floristic elements of each biogeographic province derive from radiation and dispersion processes during geological ages, whose adap-

Endemic species in Bolivia are associated with a wide range of diverse habitats and originated from different processes that have modeled the natural landscape in the past, particularly in the montane formations lying on the Andean and Brazilian lithospheres, specifically the uplift of the central Andes [4] 18 million years ago in the west and the slow weathering of the Precambrian Brazilian shield in the east, for example, through three biogeographical models of speciation in central Andes: vicariance of Andean uplifts, dispersal during the Pleistocene, and vicariance in both eastern and western slopes during glacial periods [5]. The rocky outcrops exposed in the Cerrado (or "brasileño-paranaense") of Bolivia have been identified as centers of plant endemism, where microhabitats are formed with specific micro-

In the present contribution, we update the record of endemic vascular plants of Bolivia and evaluate general striking features and patterns of endemic plants and their relationships with vegetation types of the country, as a baseline for further

A large part of the information collected in the country is concentrated in databases and botanical collections of the National Herbarium of Bolivia (acronym, LPB in the Index Herbariorum). Due to a constant communication with experts and specialists from different groups of plants, publications and other valid and current scientific denominations about recent taxonomic works are available. This support constitutes our main source of references. Recently, an intense data compilation process has resulted from the information gathered for the "Catálogo de las Plantas Vasculares de Bolivia," published in 2014 [8] which mainly continues to be updated in Tropicos (www.tropicos.org, revised until November 7, 2018), as well as in other recent publications. The botanical inventory of Bolivia has been documented based on 650,000 herbarium specimens. The distribution of the collections covers a higher density in regions of the eastern slopes of the Andes, which includes the humid forests and the fragmented forests of the dry inter-Andean valleys (Figure 1). Recent publications and taxonomic updates to the Bolivian flora

In the highlands of the Andes toward the southwest and also in ravines and hills of the eastern Andean mountains, Polylepis (Rosaceae) forests (Figure 2a) are found, which are considered to be the highest in the world. However, they have been excluded here as a major vegetation formation because they are distributed in both a fragmented and azonal pattern in different vegetation formations, such as montane forests, dry puna, and humid puna. Therefore, a slightly modified map according to two vegetational classifications [8, 18] was elaborated

The consideration of the endemic species follows in relation to the vegetation formations in which they are represented, which allows an evaluation on the distribution and striking characteristics of the families represented. This information is

tation has been consolidated in current landscapes.

of vascular plants were the basis for this work [9–17].

climatic conditions [6, 7].

studies.

Endemic Species

2. Methodology

(Figure 3).

26

3. Results: what do we know to present?

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

Floristic elements

Stevia (25)

Portulaca (2)

Vegetation formations of Bolivia (modified from [18, 8]).

DOI: http://dx.doi.org/10.5772/intechopen.82776

The endemic floristic elements represent biogeographic provinces that are found in Bolivia (Table 1). The highest representativeness comes from the Andes with 81% for the endemic plants of Bolivia, followed by the Amazon (16%), the Cerrado (9%), and the Gran Chaco (3%), whereas in four reported natural regions registered for each specimen in www.tropicos.com, trends in endemism are shown: the Andes (69.4%), lowlands (22.3%), Altiplano (6.6%), and uncertain (1.65%). Although there are many mixtures of floristic elements in the country, it is generally recognized that certain vegetation formations are related to biogeographical affinities. The Amazonian province includes in general four vegetation types: northern and southern Beni savannahs, humid forest, and Amazonian camps, ranging from 100 to 400 m elevation. Both dry and humid "punas," Polylepis forests, dry inter-Andean valleys, Tucumanian-Bolivian forest, the Yungas, and the Yungueñan "páramo" make up the Andean province with 1500–5500 m elevation. For the Cerrado, the vegetation formations of the "campos cerrados" and the semideciduous Chiquitanian forest are included, between 400 and 1100 m elevation. And finally, both dry Chaqueñan forest and Chaqueñan foothills forest belong

> Aa (5), Adesmia (1), Aspidosperma (1), Baccharis (13), Capsicum (3), Catasetum (8), Croton (4), Festuca (17), Nototriche (8), Passiflora (22), Protium (1), Solanum (20),

> Acosium (1), Arachis (7), Borreria (4), Bromelia (1), Calea (3), Cordia (1), Discocactus

Annona (1), Andropogon (3), Attalea (1), Axonopus (2), Diospyros (2), Ficus (1), Heliconia (1), Machaerium (3), Nectandra (2), Neea (5), Paspalum (4), Sloanea (1)

Bulnesia (1), Cereus (3), Cnidoscolus (2), Gaya (3), Izozogia (1), Pereskia (3),

Some characteristic genera of the four main biogeographic provinces in Bolivia. The number of endemic species

(2), Frailea (2), Oxypetalum (4), Syagrus (1), Vellozia (1)

3.1 Diversity and distribution

Figure 3.

Andean province

Amazonian province

Gran Chaco province

is indicated in brackets.

Cerrado province

Table 1.

29

#### Figure 2.

Vegetation formations of Bolivia. (a) Polylepis forest, (b) humid forest, (c) the Yungas, (d) Tucumanian-Bolivian forests, (e) "Campos cerrados," and (f) Chaqueñan foothills forests.

The conservation status of endemic Bolivian plants has been evaluated in the four published red books [19–22] focused on plants of the Cerrado, wild relatives of cultivated plants, threatened plants of the Andean zone, and threatened plants of the lowlands.

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 3. Vegetation formations of Bolivia (modified from [18, 8]).

### 3. Results: what do we know to present?

#### 3.1 Diversity and distribution

The endemic floristic elements represent biogeographic provinces that are found in Bolivia (Table 1). The highest representativeness comes from the Andes with 81% for the endemic plants of Bolivia, followed by the Amazon (16%), the Cerrado (9%), and the Gran Chaco (3%), whereas in four reported natural regions registered for each specimen in www.tropicos.com, trends in endemism are shown: the Andes (69.4%), lowlands (22.3%), Altiplano (6.6%), and uncertain (1.65%).

Although there are many mixtures of floristic elements in the country, it is generally recognized that certain vegetation formations are related to biogeographical affinities. The Amazonian province includes in general four vegetation types: northern and southern Beni savannahs, humid forest, and Amazonian camps, ranging from 100 to 400 m elevation. Both dry and humid "punas," Polylepis forests, dry inter-Andean valleys, Tucumanian-Bolivian forest, the Yungas, and the Yungueñan "páramo" make up the Andean province with 1500–5500 m elevation. For the Cerrado, the vegetation formations of the "campos cerrados" and the semideciduous Chiquitanian forest are included, between 400 and 1100 m elevation. And finally, both dry Chaqueñan forest and Chaqueñan foothills forest belong


#### Table 1.

Some characteristic genera of the four main biogeographic provinces in Bolivia. The number of endemic species is indicated in brackets.

The conservation status of endemic Bolivian plants has been evaluated in the four published red books [19–22] focused on plants of the Cerrado, wild relatives of cultivated plants, threatened plants of the Andean zone, and threatened plants of

Vegetation formations of Bolivia. (a) Polylepis forest, (b) humid forest, (c) the Yungas, (d) Tucumanian-

Bolivian forests, (e) "Campos cerrados," and (f) Chaqueñan foothills forests.

the lowlands.

28

Figure 2.

Endemic Species

to the Gran Chaco at 400–700 m. The meeting point of biogeographic Amazonian and Andean elements is mostly represented in the Yungas of the eastern slopes of the Andes, between 1500 and 3000 m elevation.

The endemic species of Bolivia make up a diverse group of life forms and taxonomic groups that contribute to the diversity of natural landscapes. Among these are trees (Annonaceae, Arecaceae, Erythroxylaceae, Fabaceae, and Lauraceae), tree ferns (Cyatheaceae), shrubs (Melastomataceae, Piperaceae), and subshrubs (Asteraceae and Ericaceae), as well as vines (Passifloraceae) and succulents (Cactaceae). There are also numerous herbaceous plants (Cyperaceae, Gesneriaceae, Iridaceae, and Poaceae), forbs (Heliconiaceae and Marantaceae), prostrate and scandent herbs (Aristolochiaceae, Convolvulaceae, and Cucurbitaceae), ferns (Dryopteridaceae and Polypodiaceae), aquatics (Eriocaulaceae and Isoëtaceae), and epiphytes (Loranthaceae and Orchidaceae).

Endemic plants were recorded from all 14 vegetation types known from Bolivia (see some examples in Figure 2). In terms of the richness of endemic species found in different vegetation formations, the trend is similar to that of plant families. The vegetation formation of the Yungas (humid mountains of the eastern Andes) hosts the highest concentration of endemic plant with 1218 (51% of the total number of endemic plants, Figure 4); it is followed by the dry inter-Andean valleys with 518 species and humid forests with 375. There are less than 50 endemic species found in vegetation formations in the alluvial plains of the lowlands (northern and southern Beni savannahs and "campos amazónicos"). Below is a synopsis of a sample on six vegetation formations represented in Bolivia with the largest number of endemic species recorded in relation to the ten families with highest level of endemism listed in in Figure 5. Most endemic species are restricted 1(2) to a specific vegetation formation, but 1.26% are distributed in four or more contiguous formations (Table 2).

The Yungas: It is located along the eastern slopes of the Andean mountain ranging between 1000 m and 3500 m. It includes the timberline at higher elevations where it forms the Yungueñan "páramo" or cloud and humid montane forests at middle altitudes and sub-Andean and lowland forests at lower altitudes. The height of the forests decreases with increasing elevation, and, especially in cloud forests, the trees are covered with mosses and other epiphytic plants (Figure 2c). The diversity of tree species is higher at low elevations and decreases as altitude increases. Bamboos (Chusquea spp.) and tree ferns (Cyathea spp.) are also frequently found here.

A total of 139 families are found in the Yungas (Figure 5a). Orchidaceae is the most abundant in species numbers (with 294), followed by Asteraceae (130) and Piperaceae (51). Among the more important genera are Lepanthes (Orchidaceae) with 50 species, Peperomia (Piperaceae) with 35, and Elaphoglossum (Dryopteridaceae) with 29.

Dry Andean forest: The vegetation is often deciduous as a result of the long dry season. Most of the native vegetation occurs in isolated populations due to an intensive agricultural expansion or the widespread plantation of exotic species, such as Eucalyptus spp., Phragmites spp., and Pinus radiata D. Don.

tree canopy and characterized by their high diversity (Figure 2b). Associations of monotypic or impoverished forests dominated by large bamboos (Guadua spp.) or palm trees (Mauritia flexuosa L.f., Oenocarpus bataua Mart.) that successfully sup-

Distribution of a number of endemic plants of Bolivia in major vegetation types, including highlands and

Of the 5663 species recorded, almost 6% are endemic coming from 138 families. Orchidaceae is the most important family (with 57 species) followed by Piperaceae (35) and Bromeliaceae (24) (Figure 5c). Piper and Peperomia (Piperaceae) are the genera with more endemic species, 18 and 17 species, respectively. Fosterella

press the growth of other species are also found here.

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 4.

lowlands.

31

(Bromeliaceae) is another genus with several (10) endemic species.

Of more than 3000 species recorded for this region, almost 16% are endemic. A total of 139 families are represented with Asteraceae having the highest number of species (97) followed by Cactaceae (83) and Bromeliaceae (52) (Figure 5b). Among the most important genera are Stevia (Asteraceae),Tillandsia (Bromeliaceae) with 24 species, and Puya (Bromeliaceae) with 20.

Humid forest: It mostly covers the alluvial plains in the lowlands of Bolivia. The topography is relatively flat from about 500 m at the lower limits of the Yungas forests down to 100 m elevation in the north, mostly evergreen with continuous

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

#### Figure 4.

to the Gran Chaco at 400–700 m. The meeting point of biogeographic Amazonian and Andean elements is mostly represented in the Yungas of the eastern slopes of

The endemic species of Bolivia make up a diverse group of life forms and taxonomic groups that contribute to the diversity of natural landscapes. Among these are trees (Annonaceae, Arecaceae, Erythroxylaceae, Fabaceae, and

Lauraceae), tree ferns (Cyatheaceae), shrubs (Melastomataceae, Piperaceae), and subshrubs (Asteraceae and Ericaceae), as well as vines (Passifloraceae) and succulents (Cactaceae). There are also numerous herbaceous plants (Cyperaceae, Gesneriaceae, Iridaceae, and Poaceae), forbs (Heliconiaceae and Marantaceae),

(Eriocaulaceae and Isoëtaceae), and epiphytes (Loranthaceae and Orchidaceae). Endemic plants were recorded from all 14 vegetation types known from Bolivia (see some examples in Figure 2). In terms of the richness of endemic species found in different vegetation formations, the trend is similar to that of plant families. The vegetation formation of the Yungas (humid mountains of the eastern Andes) hosts the highest concentration of endemic plant with 1218 (51% of the total number of endemic plants, Figure 4); it is followed by the dry inter-Andean valleys with 518 species and humid forests with 375. There are less than 50 endemic species found in vegetation formations in the alluvial plains of the lowlands (northern and southern Beni savannahs and "campos amazónicos"). Below is a synopsis of a sample on six vegetation formations represented in Bolivia with the largest number of endemic species recorded in relation to the ten families with highest level of endemism listed in in Figure 5. Most endemic species are restricted 1(2) to a specific vegetation formation, but 1.26% are distributed in four or more contiguous

The Yungas: It is located along the eastern slopes of the Andean mountain ranging between 1000 m and 3500 m. It includes the timberline at higher elevations where it forms the Yungueñan "páramo" or cloud and humid montane forests at middle altitudes and sub-Andean and lowland forests at lower altitudes. The height of the forests decreases with increasing elevation, and, especially in cloud forests, the trees are covered with mosses and other epiphytic plants (Figure 2c). The diversity of tree species is higher at low elevations and decreases as altitude increases. Bamboos (Chusquea spp.) and tree ferns (Cyathea spp.) are also fre-

A total of 139 families are found in the Yungas (Figure 5a). Orchidaceae is the most abundant in species numbers (with 294), followed by Asteraceae (130) and Piperaceae (51). Among the more important genera are Lepanthes (Orchidaceae)

Dry Andean forest: The vegetation is often deciduous as a result of the long dry

Of more than 3000 species recorded for this region, almost 16% are endemic. A total of 139 families are represented with Asteraceae having the highest number of species (97) followed by Cactaceae (83) and Bromeliaceae (52) (Figure 5b). Among the most important genera are Stevia (Asteraceae),Tillandsia (Bromeliaceae) with

Humid forest: It mostly covers the alluvial plains in the lowlands of Bolivia. The topography is relatively flat from about 500 m at the lower limits of the Yungas forests down to 100 m elevation in the north, mostly evergreen with continuous

season. Most of the native vegetation occurs in isolated populations due to an intensive agricultural expansion or the widespread plantation of exotic species, such

with 50 species, Peperomia (Piperaceae) with 35, and Elaphoglossum

as Eucalyptus spp., Phragmites spp., and Pinus radiata D. Don.

24 species, and Puya (Bromeliaceae) with 20.

prostrate and scandent herbs (Aristolochiaceae, Convolvulaceae, and Cucurbitaceae), ferns (Dryopteridaceae and Polypodiaceae), aquatics

the Andes, between 1500 and 3000 m elevation.

Endemic Species

formations (Table 2).

quently found here.

30

(Dryopteridaceae) with 29.

Distribution of a number of endemic plants of Bolivia in major vegetation types, including highlands and lowlands.

tree canopy and characterized by their high diversity (Figure 2b). Associations of monotypic or impoverished forests dominated by large bamboos (Guadua spp.) or palm trees (Mauritia flexuosa L.f., Oenocarpus bataua Mart.) that successfully suppress the growth of other species are also found here.

Of the 5663 species recorded, almost 6% are endemic coming from 138 families. Orchidaceae is the most important family (with 57 species) followed by Piperaceae (35) and Bromeliaceae (24) (Figure 5c). Piper and Peperomia (Piperaceae) are the genera with more endemic species, 18 and 17 species, respectively. Fosterella (Bromeliaceae) is another genus with several (10) endemic species.

Begonia (Begoniaceae) and Puya (Bromeliaceae) are the genera with most endemic

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

(Anacardiaceae), Handroanthus lapacho (K. Schumann) Sandwith (Bignoniaceae), and Pseudobombax marginatum (A. St.-Hil., A. Juss. & Cambess.) A. Robyns

Almost 6% are endemic, and the most common families with endemic species are Fabaceae (with 27 species), Asteraceae (16), and Malvaceae (14) (Figure 5f). Within the Fabaceae, the genus Arachis has the highest level of endemism with

Among ferns and fern allies (Pteridophyta) together with the angiosperms of Bolivia, there are 2396 endemic species, in 670 genera and 141 families (Table 3). Seven angiosperm families account for 50% of the total (Figure 6): Orchidaceae, Asteraceae, Bromeliaceae, Cactaceae, Fabaceae, Poaceae, and Piperaceae. In the case of the Pteridophyta, two families comprise slightly less than 50% of the total: Dryopteridaceae with 43 species and Polypodiaceae with 26. Among the genera with the highest number of endemic species are Puya (Bromeliaceae, 55 species), Lepanthes (Orchidaceae, 52), Peperomia (Piperaceae, 51), Solanum (Solanaceae, 44), and Tillandsia (Bromeliaceae, 37), among others (Figure 7). In any case, the representation of four genera of the Orchidaceae has in total 134 endemic species. If we relate the number of endemic species per family to the total numbers represented in Bolivia, the patterns show different percentages (Table 4).

Orchids comprise the family with the highest number of endemic species, but this represents only 32.5% of the total; in Asteraceae the figure is 20.2%, whereas in the

Bromeliaceae the endemic species amount to 45.8% of the total, and in the Cactaceae it rises to 55.9%. In Triuridaceae and Tropaeolaceae, the number of endemics amounts to about 50%, but the first has only 2 native species with 1 endemic, while the second has 14 species with 7 endemic. In addition there is another group where the percentage of endemism is low, ranging from 9 to 20% in

families such as Fabaceae, Arecaceae, Poaceae, Amaranthaceae, and others. In the case of species sorted by genera, various trends can be discerned (Table 5) as follows: 84.6% of Puya spp. (Bromeliaceae) are endemic, whereas in Begonia (Begoniaceae) the figure is 48.1%, Piper (Piperaceae) 30.1%, Solanum (Solanaceae) only the 23.7%, and Trichilia (Meliaceae) a mere 5.3%. Three genera, each with 25 endemic species, show very different trends in endemism, such as for Masdevallia (Orchidaceae) 78.1%, for Siphocampylus (Campanulaceae) 56.8%, and

Angiosperms 125/641/2263 89/96/94 Pteridophyta 16/29/139 11/4/6

Bolivian endemic vascular families, genera, and species and percentage from the total.

Families/genera/species % from the total

for Miconia (Melastomataceae) 17.7% (Figure 8).

Semideciduous Chiquitanian forest: It includes deciduous and semideciduous forests that are located throughout the Chiquitanian region in the department of Santa Cruz, between 400 and 700 m of elevation. Some characteristic species of the Chiquitania are Machaerium nyctitans (Vell.) Benth. (Fabaceae), M. acutifolium Vogel, Amburana cearensis (Allemão) A.C.Sm., Schinopsis brasiliensis Engel

species (nine and eight, respectively).

DOI: http://dx.doi.org/10.5772/intechopen.82776

(Malvaceae).

seven species.

Table 3.

33

3.1.1 Taxonomic groups

Figure 5.

The ten families with the largest number of endemic species in six vegetation formations of Bolivia.


#### Table 2.

List of endemic species represented in less geographically restricted sites.

Yungueñan "páramo": Between 3500 and 4200 m elevation, this formation forms belts of grass and scrubs fed by nearly permanent precipitation. The most common genera include Jarava, Festuca, Brachyotum, Clinopodium, Mutisia, Chuquiraga, Baccharis, Calceolaria, and Gnaphalium. Other notable species include communities of Puya raimondii Harms and many species of the Ericaceae family.

Here a total of 846 species with ca. 22% endemics is found. The largest number of endemic species belongs to the family Orchidaceae (with 52 species), followed by Asteraceae (19) and Bromeliaceae (15) (Figure 5d). Among genera with the most numerous endemic species are Puya (Bromeliaceae) and Gentianella (Gentianaceae) with 15 and 13 species, respectively.

Tucumanian-Bolivian forest: Both humid to semi-humid forests cover the eastern slopes of the Andes in southern Bolivia between 500 and 1300 m elevation (Figure 3d). Among the more important elements are patches of Polylepis hieronymi Pilger (Rosaceae) and Podocarpus parlatorei Pilg. (Podocarpaceae) at higher altitudes; also are characteristic Polylepis crista-galli Ruiz & Pav., Alnus acuminata Kunth (Betulaceae) and Juglans australis Griseb. (Juglandaceae).

A total of 1647 species has been recorded here, of which close to 10% are endemic. Among the 130 families reported with endemic species, the most speciose are Orchidaceae (with 25), Asteraceae, and Bromeliaceae (21) (Figure 5e).

#### Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Begonia (Begoniaceae) and Puya (Bromeliaceae) are the genera with most endemic species (nine and eight, respectively).

Semideciduous Chiquitanian forest: It includes deciduous and semideciduous forests that are located throughout the Chiquitanian region in the department of Santa Cruz, between 400 and 700 m of elevation. Some characteristic species of the Chiquitania are Machaerium nyctitans (Vell.) Benth. (Fabaceae), M. acutifolium Vogel, Amburana cearensis (Allemão) A.C.Sm., Schinopsis brasiliensis Engel (Anacardiaceae), Handroanthus lapacho (K. Schumann) Sandwith (Bignoniaceae), and Pseudobombax marginatum (A. St.-Hil., A. Juss. & Cambess.) A. Robyns (Malvaceae).

Almost 6% are endemic, and the most common families with endemic species are Fabaceae (with 27 species), Asteraceae (16), and Malvaceae (14) (Figure 5f). Within the Fabaceae, the genus Arachis has the highest level of endemism with seven species.

#### 3.1.1 Taxonomic groups

Among ferns and fern allies (Pteridophyta) together with the angiosperms of Bolivia, there are 2396 endemic species, in 670 genera and 141 families (Table 3). Seven angiosperm families account for 50% of the total (Figure 6): Orchidaceae, Asteraceae, Bromeliaceae, Cactaceae, Fabaceae, Poaceae, and Piperaceae. In the case of the Pteridophyta, two families comprise slightly less than 50% of the total: Dryopteridaceae with 43 species and Polypodiaceae with 26. Among the genera with the highest number of endemic species are Puya (Bromeliaceae, 55 species), Lepanthes (Orchidaceae, 52), Peperomia (Piperaceae, 51), Solanum (Solanaceae, 44), and Tillandsia (Bromeliaceae, 37), among others (Figure 7). In any case, the representation of four genera of the Orchidaceae has in total 134 endemic species.

If we relate the number of endemic species per family to the total numbers represented in Bolivia, the patterns show different percentages (Table 4). Orchids comprise the family with the highest number of endemic species, but this represents only 32.5% of the total; in Asteraceae the figure is 20.2%, whereas in the Bromeliaceae the endemic species amount to 45.8% of the total, and in the Cactaceae it rises to 55.9%. In Triuridaceae and Tropaeolaceae, the number of endemics amounts to about 50%, but the first has only 2 native species with 1 endemic, while the second has 14 species with 7 endemic. In addition there is another group where the percentage of endemism is low, ranging from 9 to 20% in families such as Fabaceae, Arecaceae, Poaceae, Amaranthaceae, and others.

In the case of species sorted by genera, various trends can be discerned (Table 5) as follows: 84.6% of Puya spp. (Bromeliaceae) are endemic, whereas in Begonia (Begoniaceae) the figure is 48.1%, Piper (Piperaceae) 30.1%, Solanum (Solanaceae) only the 23.7%, and Trichilia (Meliaceae) a mere 5.3%. Three genera, each with 25 endemic species, show very different trends in endemism, such as for Masdevallia (Orchidaceae) 78.1%, for Siphocampylus (Campanulaceae) 56.8%, and for Miconia (Melastomataceae) 17.7% (Figure 8).


Table 3.

Bolivian endemic vascular families, genera, and species and percentage from the total.

Yungueñan "páramo": Between 3500 and 4200 m elevation, this formation forms belts of grass and scrubs fed by nearly permanent precipitation. The most common genera include Jarava, Festuca, Brachyotum, Clinopodium, Mutisia, Chuquiraga, Baccharis, Calceolaria, and Gnaphalium. Other notable species include communities of Puya raimondii Harms and many species of the Ericaceae family. Here a total of 846 species with ca. 22% endemics is found. The largest number of endemic species belongs to the family Orchidaceae (with 52 species), followed by Asteraceae (19) and Bromeliaceae (15) (Figure 5d). Among genera with the most numerous endemic species are Puya (Bromeliaceae) and Gentianella (Gentianaceae)

With six types Bougainvillea modesta Heimerl, Paspalum ekmanianum Henrard

The ten families with the largest number of endemic species in six vegetation formations of Bolivia.

Acianthera boliviana (Rchb. F.) Pridgeon & M.W. Chase, Aechmea kuntzeana Mez, Aegiphila herzogii Moldenke, Aristida friesii Hack. Ex Henrard, Bellucia beckii S.S. Renner, Cleistocactus samaipatanus (Cárdenas) D.R. Hunt, Croton abutilifolius Croizat, Furcraea boliviensis Ravenna, Gentianella inaequicalyx (Gilg) J.S. Pringle, Hippeastrum evansiae (Traub &

I.S. Nelson) H.E. Moore, Lepidaploa tarijensis (Griseb.) H. Rob., Lonchocarpus pluvialis Rusby, Lupinus buchtienii Rusby, Maytenus tunarina Loes. ex Kuntze, Nassella holwayii (Hitchc.) Barkworth, Paranephelius asperifolius (Muschl.) H. Rob. & Brettell, Pitcairnia cardenasii L.B. Sm., Schoepfia tetramera Herzog, Steinbachiella leptoclada Harms, Stevia sarensis B.L. Rob.,Tillandsia hegeri Ehlers,Trichogonia capitata (Rusby) B.L. Rob.

Festuca fiebrigii Pilg., Gentianella silenoides (Gilg) Fabris, Machaerium latifolium Rusby, Recordia boliviana Moldenke, Stevia setifera Rusby ex B.L.

Endemic species

Rob.

List of endemic species represented in less geographically restricted sites.

Tucumanian-Bolivian forest: Both humid to semi-humid forests cover the eastern slopes of the Andes in southern Bolivia between 500 and 1300 m elevation (Figure 3d). Among the more important elements are patches of Polylepis hieronymi Pilger (Rosaceae) and Podocarpus parlatorei Pilg. (Podocarpaceae) at higher altitudes; also are characteristic Polylepis crista-galli Ruiz & Pav., Alnus acuminata

A total of 1647 species has been recorded here, of which close to 10% are endemic. Among the 130 families reported with endemic species, the most speciose are Orchidaceae (with 25), Asteraceae, and Bromeliaceae (21) (Figure 5e).

Kunth (Betulaceae) and Juglans australis Griseb. (Juglandaceae).

with 15 and 13 species, respectively.

Figure 5.

Endemic Species

With four contiguous vegetation types

With five contiguous vegetation types

Table 2.

32

Figure 6. Angiosperm plant families with the highest number of endemic species in Bolivia.

The records of endemic species of Bolivia are accompanied by a brief photographic synopsis that illustrates the characteristics of selected taxa (Figures 9–12). We present four groups of photographs: endemic palms [11], endemic plants of the Madidi region [10], endemic plants of the Bolivian Cerrado [16], and inter-Andean valleys with dry forests [23]. Tree palms and acaulescent species are represented here by Attalea blepharopus Mart. that grows in very humid forests in central Bolivia (Figure 9a) and then three species of the genus Syagrus: S. petraea (Mart.) Becc. from the plains and rocky hills of the Cerrado (Figure 9b), S. yungasensis M. Moraes from the drier montane forests (Figure 9c), and S. cardenasii Glassman from the alluvial plains, as well as in sub-Andean highlands (Figure 9d).

Among endemic Bolivian plants of the Madidi National Park in the NW of the country (mostly comprising Yungas vegetation), Prestonia leco A. Fuentes & J. F. Morales (Apocynaceae) is a liana found in the humid submontane forest (Figure 10a). Passiflora madidiana P. Jørg., Cayola & Araujo-Murak. (Passifloraceae) is an endemic climber of the dry forests of the Tuichi river basin (Figure 10b). Stenostephanus suburceolatus J.R.I.Wood (Acanthaceae) is a terrestrial

herb (Figure 10c), known from a single population of seasonally moist low altitude Andean forest. Finally,Tristerix rhodanthus Kuijt (Loranthaceae) is a hemiparasite

Plant family Endemic species Representativeness in the family (%)

50.0

Cactaceae 127 55.9

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

Begoniaceae 26 48.1 Bromeliaceae 147 45.8 Zygophyllaceae 3 40.0 Proteaceae 5 38.5 Piperaceae 79 36.6 Orchidaceae 415 32.5 Acanthaceae 49 28.3 Dioscoreaceae 11 23.9 Asteraceae 243 20.2 Solanaceae 61 19.2 Euphorbiaceae 39 13.0 Amaranthaceae 14 11.4 Poaceae 81 9.5 Arecaceae 9 9.3 Fabaceae 92 8.9

7

The Chiquitanian endemic examples are as follows: Blepharodon crabrorum Goyder (Apocynaceae), a subshrub that blooms all the year and is found in rock

collected in cloud forest fragments (Figure 10d).

Comparison of the level of endemism in some families of Bolivian native plants.

Genera with the highest number of endemic species in Bolivia.

Triuridaceae, Tropaeolaceae 1,

Figure 7.

Table 4.

35

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 7. Genera with the highest number of endemic species in Bolivia.


#### Table 4.

The records of endemic species of Bolivia are accompanied by a brief photographic synopsis that illustrates the characteristics of selected taxa (Figures 9–12). We present four groups of photographs: endemic palms [11], endemic plants of the Madidi region [10], endemic plants of the Bolivian Cerrado [16], and inter-Andean valleys with dry forests [23]. Tree palms and acaulescent species are represented here by Attalea blepharopus Mart. that grows in very humid forests in central Bolivia (Figure 9a) and then three species of the genus Syagrus: S. petraea (Mart.) Becc. from the plains and rocky hills of the Cerrado (Figure 9b), S.

Angiosperm plant families with the highest number of endemic species in Bolivia.

Figure 6.

Endemic Species

34

yungasensis M. Moraes from the drier montane forests (Figure 9c), and S. cardenasii Glassman from the alluvial plains, as well as in sub-Andean highlands (Figure 9d). Among endemic Bolivian plants of the Madidi National Park in the NW of the country (mostly comprising Yungas vegetation), Prestonia leco A. Fuentes & J. F.

(Passifloraceae) is an endemic climber of the dry forests of the Tuichi river basin (Figure 10b). Stenostephanus suburceolatus J.R.I.Wood (Acanthaceae) is a terrestrial

Morales (Apocynaceae) is a liana found in the humid submontane forest (Figure 10a). Passiflora madidiana P. Jørg., Cayola & Araujo-Murak.

Comparison of the level of endemism in some families of Bolivian native plants.

herb (Figure 10c), known from a single population of seasonally moist low altitude Andean forest. Finally,Tristerix rhodanthus Kuijt (Loranthaceae) is a hemiparasite collected in cloud forest fragments (Figure 10d).

The Chiquitanian endemic examples are as follows: Blepharodon crabrorum Goyder (Apocynaceae), a subshrub that blooms all the year and is found in rock


#### Table 5.

Comparison of the level endemism in some genera of Bolivian native plants.

crevices on vertical cliff faces (Figure 11a); Mimosa crasspedisetosa Fortunato & Palese (Fabaceae) a branched shrub or subshrub in scattered places in the plains of "campos cerrados" (Figure 11b); Frailea chiquitana Cárdenas (Cactaceae), a small and wooly cactus common in the slabs (Figure 11c); Centratherum cardenasii (I.S. Nelson & Traub) Van Scheepen (Amaryllidaceae), a perennial herb that grows in sandy Cerrado (Figure 11d); Hippeastrum starkiorum (I.S.Nelson & Traub) Van Scheepen (Amaryllidaceae), a rare bulbous herb that grows in rock crevices in campo rupestre and on hills (Figure 11e); and Pitcairnia chiquitana R. Vásquez & Ibisch (Bromeliaceae), cespitose plant, which is locally abundant on rock platforms and in campo rupestre (Figure 11f).

Endemic plants from dry forests in Andean valleys are as follows: Cardenasiodendron brachypterum (Loes.) F.A. Barkley (Anacardiaceae) (Figure 12a), a tree that grows on dry hillsides on rocky soils below 2600 m; Mastigostyla cardenasii R.C. Foster (Iridaceae) (Figure 12b), an herb of these valleys that reaches the humid puna; Ipomoea exerta Goyder & Fontella (Apocynaceae), a very rare herb and grows in dispersed zones at 2500 m (Figure 12c); Oxypetalum fuscum Epling (Lamiaceae), a short vine that is frequent in thickets (Figure 12d); Lepechinia bella, a small shrub that grows on rocky slopes (Figure 12e); and Puya weddelliana (Baker) Mez (Bromeliaceae) (Figure 12f), a rosette plant, which grows in groups on rocky slopes.

4. Discussion

Figure 8.

37

Our knowledge of the floristic composition of Bolivia and its richness has increased in the last 20 years although there are still changes, such as new species and endemics; in addition, the level of our understanding has resulted from the intensification of botanical collections and fieldwork in geographical areas that are botanically less known. Until 1992, a list of 20 endemic monotypic genera of Bolivia in 13 families of vascular plants that existed was the first basis and a large number of herbarium specimens that had not been identified [1]; in the case of mosses, Bolivia has an

Major biogeographic regions represented in Bolivia (adapted from [3]).

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

The most endangered species fall into three categories: critically endangered (CR) with 19 endemic species, followed by threatened (EN) with 80, and vulnerable (VU) with 66 (Figure 12). The total of 165 endemic plants that have been evaluated as threatened in Bolivia indicates that only 6.9% of the total number of endemic species has been assessed. A sample of 14 endemic species from Bolivia along with the category they belong to is shown in Table 6.

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 8. Major biogeographic regions represented in Bolivia (adapted from [3]).

### 4. Discussion

Our knowledge of the floristic composition of Bolivia and its richness has increased in the last 20 years although there are still changes, such as new species and endemics; in addition, the level of our understanding has resulted from the intensification of botanical collections and fieldwork in geographical areas that are botanically less known. Until 1992, a list of 20 endemic monotypic genera of Bolivia in 13 families of vascular plants that existed was the first basis and a large number of herbarium specimens that had not been identified [1]; in the case of mosses, Bolivia has an

crevices on vertical cliff faces (Figure 11a); Mimosa crasspedisetosa Fortunato & Palese (Fabaceae) a branched shrub or subshrub in scattered places in the plains of "campos cerrados" (Figure 11b); Frailea chiquitana Cárdenas (Cactaceae), a small and wooly cactus common in the slabs (Figure 11c); Centratherum cardenasii (I.S. Nelson & Traub) Van Scheepen (Amaryllidaceae), a perennial herb that grows in sandy Cerrado (Figure 11d); Hippeastrum starkiorum (I.S.Nelson & Traub) Van Scheepen (Amaryllidaceae), a rare bulbous herb that grows in rock crevices in campo rupestre and on hills (Figure 11e); and Pitcairnia chiquitana R. Vásquez & Ibisch (Bromeliaceae), cespitose plant, which is locally abundant on rock platforms

Comparison of the level endemism in some genera of Bolivian native plants.

Plant genus Endemic species Representativeness in the genus (%)

Cleistocactus 14 82.3 Puya 55 84.6 Masdevallia 25 78.1 Lepanthes 52 74.3 Monnina 16 69.6 Arachis 12 63.1 Siphocampylus 25 56.8 Gentianella 27 50.0 Begonia 26 48.1 Peperomia 51 41.5 Tillandsia 37 35.2 Piper 28 30.1 Elaphoglossum 33 26.0 Solanum 44 23.7 Miconia 25 17.7 Pavonia 6 13.0 Trichilia 1 5.3

Endemic plants from dry forests in Andean valleys are as follows: Cardenasiodendron brachypterum (Loes.) F.A. Barkley (Anacardiaceae) (Figure 12a), a tree that grows on dry hillsides on rocky soils below 2600 m; Mastigostyla cardenasii R.C. Foster (Iridaceae) (Figure 12b), an herb of these valleys that reaches the humid puna; Ipomoea exerta Goyder & Fontella (Apocynaceae), a very rare herb and grows in dispersed zones at 2500 m (Figure 12c); Oxypetalum fuscum Epling (Lamiaceae), a short vine that is frequent in thickets (Figure 12d); Lepechinia bella, a small shrub that grows on rocky slopes (Figure 12e); and Puya weddelliana (Baker) Mez (Bromeliaceae) (Figure 12f), a rosette plant, which grows

The most endangered species fall into three categories: critically endangered (CR) with 19 endemic species, followed by threatened (EN) with 80, and vulnerable (VU) with 66 (Figure 12). The total of 165 endemic plants that have been evaluated as threatened in Bolivia indicates that only 6.9% of the total number of endemic species has been assessed. A sample of 14 endemic species from Bolivia

along with the category they belong to is shown in Table 6.

and in campo rupestre (Figure 11f).

Table 5.

Endemic Species

in groups on rocky slopes.

36

#### Figure 9.

Endemic palms of Bolivia. (a) Attalea blepharopus, (b) Syagrus petraea, (c) Syagrus yungasensis, and (d) Syagrus cardenasii (Arecaceae). Photographs: Mónica Moraes R.

tropicos.org), and the present work reports a total of 2402 endemic plants of Bolivia;

Endemic plants of Madidi National Park. a. Prestonia leco (Apocynaceae), b. Passiflora madidiana (Passifloraceae), c. Stenostephanus suburceolatus (Acanthaceae) and d. Tristerix rhodanthus (Loranthaceae). Photographs, a,c-d: Alfredo Fuentes, b: Alejandro Araujo-Murakami.

As in other botanical cases, it is very important to update the knowledge about the endemic flora. With the example of the 20 species in monotypic genera reported by Moraes and Beck [1], the number of endemisms for Bolivia was reduced to 14, and only 5 are monotypic: Cardenasiodendron brachypterum (Loes.) F.A. Barkley, Polyclita turbinata (Kuntze) A.C. Sm., Rusbya taxifolia Britton, Boelckea beckii Rossow, and Recordia boliviana Moldenke; only Cardenasiodendron brachypterum

On the eastern slope of the Andes and in the Amazon basin in Peru and Bolivia,

this means that in 4 years it has increased by 2.5%.

Figure 10.

39

(Loes.) F.A. Barkley was assessed as VU by Navarro et al. [21].

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

435 species in four plant groups, Anacardiaceae, Chrysobalanaceae, Inga (Fabaceae), and Malpighiaceae, were found to be endemic in the lowlands [25]. Acanthaceae presented its highest point of endemism at medium elevations, and nine plant groups, Aquifoliaceae, Brunelliaceae, Campanulaceae, Ericaceae, Loasaceae, Marcgraviaceae, Fuchsia (Onagraceae), and Passifloraceae, presented their highest point of endemism at elevations above 2000 m. Probably 20–25% of

inventory of 920 species, of which 55 are endemic [24]. In contrast in 2014, 2343 species of vascular plants were reported as endemic to Bolivia from a total of 12,165 species in 286 families [8], and 13.6% endemics were reported in the fern family Polypodiaceae and 33% for orchids but in the gymnosperms and in the angiosperms. Currently the number has risen to 12,239 native species of vascular plants (www.

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

#### Figure 10.

Endemic plants of Madidi National Park. a. Prestonia leco (Apocynaceae), b. Passiflora madidiana (Passifloraceae), c. Stenostephanus suburceolatus (Acanthaceae) and d. Tristerix rhodanthus (Loranthaceae). Photographs, a,c-d: Alfredo Fuentes, b: Alejandro Araujo-Murakami.

tropicos.org), and the present work reports a total of 2402 endemic plants of Bolivia; this means that in 4 years it has increased by 2.5%.

As in other botanical cases, it is very important to update the knowledge about the endemic flora. With the example of the 20 species in monotypic genera reported by Moraes and Beck [1], the number of endemisms for Bolivia was reduced to 14, and only 5 are monotypic: Cardenasiodendron brachypterum (Loes.) F.A. Barkley, Polyclita turbinata (Kuntze) A.C. Sm., Rusbya taxifolia Britton, Boelckea beckii Rossow, and Recordia boliviana Moldenke; only Cardenasiodendron brachypterum (Loes.) F.A. Barkley was assessed as VU by Navarro et al. [21].

On the eastern slope of the Andes and in the Amazon basin in Peru and Bolivia, 435 species in four plant groups, Anacardiaceae, Chrysobalanaceae, Inga (Fabaceae), and Malpighiaceae, were found to be endemic in the lowlands [25]. Acanthaceae presented its highest point of endemism at medium elevations, and nine plant groups, Aquifoliaceae, Brunelliaceae, Campanulaceae, Ericaceae, Loasaceae, Marcgraviaceae, Fuchsia (Onagraceae), and Passifloraceae, presented their highest point of endemism at elevations above 2000 m. Probably 20–25% of

inventory of 920 species, of which 55 are endemic [24]. In contrast in 2014, 2343 species of vascular plants were reported as endemic to Bolivia from a total of 12,165 species in 286 families [8], and 13.6% endemics were reported in the fern family Polypodiaceae and 33% for orchids but in the gymnosperms and in the angiosperms. Currently the number has risen to 12,239 native species of vascular plants (www.

Endemic palms of Bolivia. (a) Attalea blepharopus, (b) Syagrus petraea, (c) Syagrus yungasensis, and

(d) Syagrus cardenasii (Arecaceae). Photographs: Mónica Moraes R.

Figure 9.

Endemic Species

38

#### Figure 11.

Endemic plants of the Chiquitano and Cerrado region. (a) Blepharodon crabrorum (Apocynaceae), (b) Mimosa crasspedisetosa (Fabaceae), (c) Frailea chiquitana (Cactaceae), (d) Centratherum cardenasii (Asteraceae), (e) Hippeastrum starkiorum (Amaryllidaceae), and (f) Pitcairnia chiquitana (Bromeliaceae). Photographs: John Wood.

the total vascular plants of Bolivia could be restricted to the country [26], the family with the highest number of endemic species being the Orchidaceae (35%, [27]). Plant endemism ranges between 59 and 85% of the species sampled in three areas of the Bolivian Chaco region [28], whereas only 18% of species in dry inter-Andean valleys of the western side of the country are endemic [29].

Our results support former conclusions by other authors. According to [26, 30], the highest concentration of plant endemism is registered in the Andean mountains, where both the Yungas (humid forests) and inter-Andean dry forests are found. Moreover, the major record of scientific collections and knowledge comes from the eastern slopes of the Andes from the NW toward the center of the country, where Bolivia's greatest biodiversity is higher [31]. Also the distribution of endemic palms

(Arecaceae) is associated with the eastern Andes [32]. But high-priority areas for representativeness of ecosystems and species, the Yungas forests, stand out as the main center of biological diversity in Bolivia due to the greater richness of species and better state of conservation with local centers of endemism, in addition to the Tucumano-Bolivian forest, Llanos de Moxos, and Amazonian forests with up to

Endemic plants of dry forests in inter-Andean valleys. (a) Cardenasiodendron brachypterum (Anacardiaceae), (b) Mastigostyla cardenasii (Iridaceae), (c) Ipomoea exerta (Convolvulaceae), (d) Oxypetalum fuscum & Fontella (Apocynaceae), (e) Lepechinia bella (Lamiaceae), and (f) Puya

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

DOI: http://dx.doi.org/10.5772/intechopen.82776

weddelliana (Bromeliaceae). Photographs: John Wood.

Figure 12.

41

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Figure 12.

the total vascular plants of Bolivia could be restricted to the country [26], the family with the highest number of endemic species being the Orchidaceae (35%, [27]). Plant endemism ranges between 59 and 85% of the species sampled in three areas of the Bolivian Chaco region [28], whereas only 18% of species in dry inter-Andean

Endemic plants of the Chiquitano and Cerrado region. (a) Blepharodon crabrorum (Apocynaceae), (b) Mimosa crasspedisetosa (Fabaceae), (c) Frailea chiquitana (Cactaceae), (d) Centratherum cardenasii (Asteraceae), (e) Hippeastrum starkiorum (Amaryllidaceae), and (f) Pitcairnia chiquitana (Bromeliaceae).

Our results support former conclusions by other authors. According to [26, 30], the highest concentration of plant endemism is registered in the Andean mountains, where both the Yungas (humid forests) and inter-Andean dry forests are found. Moreover, the major record of scientific collections and knowledge comes from the eastern slopes of the Andes from the NW toward the center of the country, where Bolivia's greatest biodiversity is higher [31]. Also the distribution of endemic palms

valleys of the western side of the country are endemic [29].

Figure 11.

Endemic Species

40

Photographs: John Wood.

Endemic plants of dry forests in inter-Andean valleys. (a) Cardenasiodendron brachypterum (Anacardiaceae), (b) Mastigostyla cardenasii (Iridaceae), (c) Ipomoea exerta (Convolvulaceae), (d) Oxypetalum fuscum & Fontella (Apocynaceae), (e) Lepechinia bella (Lamiaceae), and (f) Puya weddelliana (Bromeliaceae). Photographs: John Wood.

(Arecaceae) is associated with the eastern Andes [32]. But high-priority areas for representativeness of ecosystems and species, the Yungas forests, stand out as the main center of biological diversity in Bolivia due to the greater richness of species and better state of conservation with local centers of endemism, in addition to the Tucumano-Bolivian forest, Llanos de Moxos, and Amazonian forests with up to


Therefore, it is expected that the total of endemic species will increase, especially in inter-Andean valleys with humid forests, as well as in the different formations that are represented in the east on Precambrian rocks of the Cerrado region in the

Endemic Plant Species of Bolivia and Their Relationships with Vegetation

At the moment, the trends that have been interpreted according to the 2402 endemic plants are indicative with respect to the families and genera with the greatest number of species. 50% is represented by seven families; among them the Orchidaceae (418 spp.), Asteraceae (246 spp.), and Bromeliaceae (147) stand out. The representativeness on the total of native species is the following: Orchidaceae with 32.5%, Asteraceae 20.2%, and Bromeliaceae 45.8%, while among the genera, Puya (Bromeliaceae) presents 55 endemic species (representing 85% of the total native species of Bolivia), Lepanthes (Orchidaceae) with 52 (means 74%), and

Although more than 80% of the plants come from the biogeographic region of the Andes, the landscape with the largest number of species (69%) is restricted to the eastern slopes (from 500 to 3500 m altitude), leaving the altiplanic landscape with only 7%. The geographical pattern that concentrates the 51% of endemisms in the humid montane forests of Yungas, where both Andean and Amazonian elements converge, is also fundamental. This feature of endemic plants also has relevance for the 22% that is represented in dry forests in Andean valleys, which

Finally, regarding the evaluation of the state of conservation of endemic plants in Bolivia, the efforts are still incipient. A total of 154 endemic species (6.9%) were evaluated in their conservation status according to IUCN categories, with the majority in threatened state (EN, 48.5%), followed by the vulnerable (VU, 40%)

The authors of this contribution indicate that they have no conflicts of interest

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

country.

Peperomia (Piperaceae) with 51 (41.5%).

DOI: http://dx.doi.org/10.5772/intechopen.82776

and in critical condition (CR, 11.5%).

Conflict of interest

Author details

43

corresponds to one-fifth of the total represented in Bolivia.

that affect the content and information of this publication.

Mónica Moraes R.\*, Carla Maldonado and Freddy S. Zenteno-Ruiz Facultad de Ciencias Puras y Naturales, Herbario Nacional de Bolivia, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz, Bolivia

\*Address all correspondence to: mmoraes@fcpn.edu.bo

provided the original work is properly cited.

#### Table 6.

Endemic plants of Bolivia and UICN categories, based on [21, 22].

15% representativeness, while in the Altiplano, more fragmented and dispersed areas were identified [30].

Worldwide there is increasing evidence confirming that endemism is a powerful tool for use in global conservation efforts: hotspots based on levels of endemism cover more number of species than richness-based hotspots and are closely related to the degree of threat [33]. Therefore, a positive relationship between endemism and species richness might be expected [34]. Although Bolivia has not been completely surveyed floristically, 2403 endemic species have been recognized, and this may indicate that species richness may be greater than it has been documented. However, it is essential to establish the state of conservation of these species in order to increase efforts and generate more responsible actions to safeguard the natural heritage.

The confirmation on the presence of species and their status as endemics represents a greater effort by scientists and is an ongoing work. Each study and botanical survey contributes to the documentation of the flora of Bolivia. To develop an adequate conservation strategy, it will be necessary to assess this large residue to understand the threat level they face. However, there is very limited information and few collections of most endemic species. The humid montane forests are a hotspot in the tropical Andes that constitute a very rich region in endemism and would be supported by a greater total richness of plants. Therefore, it is essential to intensify the survey of species throughout their range, especially when there are still a large percentage of well-conserved landscapes and the threats are more locally concentrated, but the incidence of global warming against them with consequences can be catastrophic.

#### 5. Conclusions

In terms of the concentration of the botanical collections made in Bolivia, there are large areas that still need to complete the surveys and records of species.

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Therefore, it is expected that the total of endemic species will increase, especially in inter-Andean valleys with humid forests, as well as in the different formations that are represented in the east on Precambrian rocks of the Cerrado region in the country.

At the moment, the trends that have been interpreted according to the 2402 endemic plants are indicative with respect to the families and genera with the greatest number of species. 50% is represented by seven families; among them the Orchidaceae (418 spp.), Asteraceae (246 spp.), and Bromeliaceae (147) stand out. The representativeness on the total of native species is the following: Orchidaceae with 32.5%, Asteraceae 20.2%, and Bromeliaceae 45.8%, while among the genera, Puya (Bromeliaceae) presents 55 endemic species (representing 85% of the total native species of Bolivia), Lepanthes (Orchidaceae) with 52 (means 74%), and Peperomia (Piperaceae) with 51 (41.5%).

Although more than 80% of the plants come from the biogeographic region of the Andes, the landscape with the largest number of species (69%) is restricted to the eastern slopes (from 500 to 3500 m altitude), leaving the altiplanic landscape with only 7%. The geographical pattern that concentrates the 51% of endemisms in the humid montane forests of Yungas, where both Andean and Amazonian elements converge, is also fundamental. This feature of endemic plants also has relevance for the 22% that is represented in dry forests in Andean valleys, which corresponds to one-fifth of the total represented in Bolivia.

Finally, regarding the evaluation of the state of conservation of endemic plants in Bolivia, the efforts are still incipient. A total of 154 endemic species (6.9%) were evaluated in their conservation status according to IUCN categories, with the majority in threatened state (EN, 48.5%), followed by the vulnerable (VU, 40%) and in critical condition (CR, 11.5%).

### Conflict of interest

15% representativeness, while in the Altiplano, more fragmented and dispersed

Endemic species Family Category Abarema centiflora Barneby & J.W. Grimes Fabaceae EN Acanthosyris asipapote M. Nee Santalaceae CR Arachis ipaensis Krapov. & W.C. Greg. Fabaceae EN Begonia baumannii Lemoine Begoniaceae VU Brunellia boliviana Britton ex Rusby Brunelliaceae VU Nasa herzogii (Urb. & Gilg) Weigend Loasaceae EN Passiflora chaparensis R. Vásquez Passifloraceae CR Philibertia zongoensis Goyder Apocynaceae CR Polylepis neglecta M. Kessler Rosaceae VU Parajubaea sunkha M. Moraes Arecaceae EN Roupala filiflora K.S. Edwards & Prance Proteaceae CR Siphocampylus reflexus Rusby Campanulaceae EN Trichocereus werdermannianus Backeb. Cactaceae VU Zanthoxylum aculeatissimum Engl. Rutaceae EN

Worldwide there is increasing evidence confirming that endemism is a powerful tool for use in global conservation efforts: hotspots based on levels of endemism cover more number of species than richness-based hotspots and are closely related to the degree of threat [33]. Therefore, a positive relationship between endemism and species richness might be expected [34]. Although Bolivia has not been completely surveyed floristically, 2403 endemic species have been recognized, and this may indicate that species richness may be greater than it has been documented. However, it is essential to establish the state of conservation of these species in order to increase efforts and generate more responsible actions to safeguard the

The confirmation on the presence of species and their status as endemics represents a greater effort by scientists and is an ongoing work. Each study and botanical survey contributes to the documentation of the flora of Bolivia. To develop an adequate conservation strategy, it will be necessary to assess this large residue to understand the threat level they face. However, there is very limited information and few collections of most endemic species. The humid montane forests are a hotspot in the tropical Andes that constitute a very rich region in endemism and would be supported by a greater total richness of plants. Therefore, it is essential to intensify the survey of species throughout their range, especially when there are still a large percentage of well-conserved landscapes and the threats are more locally concentrated, but the incidence of global warming against them with consequences

In terms of the concentration of the botanical collections made in Bolivia, there

are large areas that still need to complete the surveys and records of species.

areas were identified [30].

Endemic plants of Bolivia and UICN categories, based on [21, 22].

Table 6.

Endemic Species

natural heritage.

can be catastrophic.

5. Conclusions

42

The authors of this contribution indicate that they have no conflicts of interest that affect the content and information of this publication.

### Author details

Mónica Moraes R.\*, Carla Maldonado and Freddy S. Zenteno-Ruiz Facultad de Ciencias Puras y Naturales, Herbario Nacional de Bolivia, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz, Bolivia

\*Address all correspondence to: mmoraes@fcpn.edu.bo

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

## References

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[2] Navarro G. Vegetación y unidades biogeográficas. In: Navarro G, Maldonado M, editors. Geografía Ecológica de Bolivia: Vegetación y Ambientes Acuáticos. Cochabamba: Editorial Centro de Ecología Simón I. Patiño; 2002. pp. 1-500

[3] Navarro G, Ferreira W. Biogeografía de Bolivia. In: Moraes RM, Mostacedo B, Zapata Ferrufino B, Altamirano S, editors. Libro Rojo de Parientes Silvestres de Cultivos de Bolivia. La Paz: Ministerio de Medio ambiente y Agua. Vice ministerio de Medio Ambiente, Biodiversidad y Cambio Climático; 2009. pp. 23-39

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Chiquitania. Santa Cruz: Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René Moreno – Department of Plant Sciences,

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Endemic Plant Species of Bolivia and Their Relationships with Vegetation

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problemanalyse und

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Virginia; 2007

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Cambio Climático; 2009

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Estado de Conocimiento y

pp. 47-88

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2012. p. 584

45

[9] Atahuachi M, Van der Bent ML, Wood JRI, Lewis GP, Hughes CE. Bolivian Mimosa (Leguminosae, Mimosoideae): Three new species and a species checklist. Phytotaxa. 2016; 260(3):201-222. DOI: 10.11646/ phytotaxa.260.3.1

[10] Fuentes AF. Flora y vegetación leñosa de los bosques de los Andes en la región Madidi, La Paz (Bolivia) [thesis]. Madrid: Facultad de Farmacia, Departamento de Biología Vegetal, Universidad Complutense de Madrid; 2016

[11] Moraes RM. Actualización de la lista de especies de Arecaceae para Bolivia. Revista de la Sociedad Boliviana de Botánica. 2015;5(1):19-28

[12] Moraes RM, Pintaud JC. Attalea blepharopus Mart. (Arecaceae) from Bolivia revisited since Martius. Candollea. 2016;71:27-32

[13] Noblick LR. A revision of the genus Syagrus (Arecaceae). Phytotaxa. 2017; 294:1-262

[14] Santamaría-Aguilar D, Fuentes AF, Lagomarsino LP. Three new species of Freziera (Pentaphylacaceae, Freziereae) from Bolivia and Peru. Phytotaxa. 2018; 39(2). DOI: 10.11646/phytotaxa.349.2.1

[15] Villarroel D, Gomes-Bezerra KM. New botanical discoveries of Myrtaceae from Bolivia and notes on Psidium hians. Phytotaxa. 2015;195(2):163-170

[16] JRI W, editor. Guía Darwin de las Plantas de los Cerrados de la

Endemic Plant Species of Bolivia and Their Relationships with Vegetation DOI: http://dx.doi.org/10.5772/intechopen.82776

Chiquitania. Santa Cruz: Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René Moreno – Department of Plant Sciences, Oxford University; 2011. p. 212

References

Endemic Species

[1] Moraes RM, Beck S. Diversidad florística de Bolivia. In: Marconi M, editor. Conservación de la Diversidad Biológica en Bolivia. La Paz: CDC-Bolivia/USAID-Bolivia; 1992. pp. 73-111 [8] Jørgensen PM, Nee M, Beck SG. Resultados. In: Jørgensen PM, Nee MH, Beck SG, editors. Catálogo de las Plantas

Monographs in Systematic Botany from the Missouri Botanical Garden; 2014.

Mimosoideae): Three new species and a species checklist. Phytotaxa. 2016; 260(3):201-222. DOI: 10.11646/

[9] Atahuachi M, Van der Bent ML, Wood JRI, Lewis GP, Hughes CE. Bolivian Mimosa (Leguminosae,

[10] Fuentes AF. Flora y vegetación leñosa de los bosques de los Andes en la región Madidi, La Paz (Bolivia) [thesis].

[11] Moraes RM. Actualización de la lista de especies de Arecaceae para Bolivia. Revista de la Sociedad Boliviana de

[12] Moraes RM, Pintaud JC. Attalea blepharopus Mart. (Arecaceae) from Bolivia revisited since Martius. Candollea. 2016;71:27-32

[13] Noblick LR. A revision of the genus Syagrus (Arecaceae). Phytotaxa. 2017;

[14] Santamaría-Aguilar D, Fuentes AF, Lagomarsino LP. Three new species of Freziera (Pentaphylacaceae, Freziereae) from Bolivia and Peru. Phytotaxa. 2018; 39(2). DOI: 10.11646/phytotaxa.349.2.1

[15] Villarroel D, Gomes-Bezerra KM. New botanical discoveries of Myrtaceae from Bolivia and notes on Psidium hians.

[16] JRI W, editor. Guía Darwin de las

Phytotaxa. 2015;195(2):163-170

Plantas de los Cerrados de la

Madrid: Facultad de Farmacia, Departamento de Biología Vegetal, Universidad Complutense de Madrid;

Botánica. 2015;5(1):19-28

Vasculares de Bolivia. St. Louis:

pp. 33-76

phytotaxa.260.3.1

2016

294:1-262

[2] Navarro G. Vegetación y unidades biogeográficas. In: Navarro G, Maldonado M, editors. Geografía Ecológica de Bolivia: Vegetación y Ambientes Acuáticos. Cochabamba: Editorial Centro de Ecología Simón I.

[3] Navarro G, Ferreira W. Biogeografía de Bolivia. In: Moraes RM, Mostacedo B, Zapata Ferrufino B, Altamirano S, editors. Libro Rojo de Parientes

Silvestres de Cultivos de Bolivia. La Paz: Ministerio de Medio ambiente y Agua. Vice ministerio de Medio Ambiente, Biodiversidad y Cambio Climático;

[4] Isacks BL. Uplift of the central Andean plateau and bending of the Bolivian orocline. Journal of Geophysical Research. 1988;93:

[5] Hazzi NA, Moreno JS, Movliav CO, Palacio RD. Biogeographic regions and events of isolation and diversification of the endemic biota of the tropical Andes. PNAS. 2018;115(31):7985-7990. DOI:

[6] Wood JRI, Mamani F, Pozo P, Soto D, Villarroel D. Guía Darwin de las Plantas de los Cerrados de la Chiquitania. Santa Cruz: Editorial Museo de Historia Natural Noel Kempff

[7] Pozo P, Wood J, Soto D, Beck S. Plantas endémicas de afloramientos rocosos en las serranías de roboré y concepción: Implicaciones para su conservación. Revista de la Sociedad Boliviana de Botánica. 2013;7(1):73-81

10.1073/pnas.1803908115

Mercado; 2011

44

Patiño; 2002. pp. 1-500

2009. pp. 23-39

3211-3231

[17] Wood JRI, Carine MA, Harris D, Wilkin P, Williams B, Scotland RW. Ipomoea (Convolvulaceae) in Bolivia. Kew Bulletin. 2015;70(31):1-123

[18] Ibisch PL, Beck SG, Gerkmann B, Carretero A. Ecoregiones y ecosistemas. In: Ibisch P, Mérida G, editors. Biodiversidad: La Riqueza de Bolivia. Estado de Conocimiento y Conservación. Santa Cruz: Fundación Amigos de la Naturaleza; 2003. pp. 47-88

[19] Mamani F, Pozo P, Soto D, Villarroel D, Wood JRI, editors. Libro Rojo de las Plantas de los Cerrados del Oriente Boliviano. Santa Cruz: Museo de Historia Natural Noel Kempff Mercado; 2010. p. 212

[20] Moraes RM, Mostacedo B, Zapata Ferrufino B, Altamirano S. Libro Rojo de Parientes Silvestres de Cultivos de Bolivia. La Paz: Ministerio de Medio ambiente y Agua. Vice Ministerio de Medio Ambiente, Biodiversidad y Cambio Climático; 2009

[21] Navarro G, Arrázola S, Atahuachi M, De la Barra N, Mercado M, Ferreira W, et al. Libro Rojo de la Flora Amenazada de Bolivia. Volumen I— Zona andina. Ministerio de Medio Ambiente y Agua—Rumbol Srl: La Paz; 2012. p. 584

[22] Centro de Biodiversidad y Genética. Libro Rojo de la Flora Amenazada de Bolivia. Volumen II—Tierras Bajas. Cochabamba; 2018, 2018. p. 708

[23] Wood JRI, editor. La Guía Darwin de las Flores de los Valles Bolivianos. London: University of Oxford and Darwin Initiative; 2005. p. 187

[24] Aldana C, Calzadilla M, Churchill SP. Evaluación de los musgos endémicos de Bolivia. Revista de la Sociedad Boliviana de Botánica. 2011;5(1):53-67

[25] Natureserve. Especies Endémicas y Sistemas Ecológicos en la Vertiente Oriental de Los Andes y la Cuenca del Amazonas en Perú y Bolivia. Arlington, Virginia; 2007

[26] Ibisch PL, Beck SG. Espermatófitas. In: Ibisch P, Mérida G, editors. Biodiversidad: La Riqueza de Bolivia. Estado de Conocimiento y Conservación. Santa Cruz: Fundación Amigos de la Naturaleza; 2003. pp. 103-112

[27] Ibisch PL. Erhaltung der pflanzlichen vielfalt des megadiversitätslandes bolivien. problemanalyse und bewertungsmethoden sowie erhaltungsstrategien und ökoregionale leitbilder [thesis]. Bonn: Faculty of Math and Natural Sciences, University of Bonn; 2002

[28] Parker TA, Gentry AH, Foster RB, Emmons LH, Remsen JV. The lowland dry forests of Bolivia: A global conservation priority. In: Conservation International, RAP Working Papers 4; 1993

[29] López RP. Diversidad florística y endemismo de los valles secos bolivianos. Ecología en Bolivia. 2003; 38(1):27-60

[30] Araujo N, Müller R, Nowicki C, Ibisch P, editors. Prioridades de Conservación de la Biodiversidad en Bolivia. Cuidando la Madre Tierra. Santa Cruz: Editorial Fundación Amigos de la Naturaleza; 2010. p. 74

[31] Fernández M, Navarro LM, Apaza-Quevedo A, Gallegos SC, Marques A, Zambrana-Torrelio C, et al. Challenges and opportunities for the Bolivian biodiversity observation network.

Journal of Life on Earth Biodiversity. 2015;16. DOI: 10.1080/14888386. 2015.1068710

[32] Moraes RM, Rios-Uzeda B, Moreno LR, Huanca-Huarachi G, Larrea-Alcázar D. Using potential distribution models for patterns of species richness, endemism, and phytogeography of palm species in Bolivia. Tropical Conservation Science Journal. 2014;7(1):45-60

[33] Orme CDL, Davies RG, Burgess M, Eigenbrod F, Pickup N, Olson VA, et al. Global hotspots of species richness are not congruent with endemism or threat. Nature. 2005;436:1016-1019. DOI: 10.1038/nature03850

[34] Lamoreux JF, Morrison JC, Ricketts TH, Olson DM, Dinerstein E, McKnight MW, et al. Global test of biodiversity concordance and the importance of endemism. Nature. 2006;440:212-214. DOI: 10.1038/nature04291

**47**

**Chapter 4**

**Abstract**

The Endemism of the Vascular

Flora of Mexico Present

Chihuahuan Desert

dedicated to agricultural and industrial activities.

chorological analysis, semiarid vegetation

**1. Introduction**

**Keywords:** biodiversity informatics, conservation, Coahuila, corrected weight endemism index, Durango, north of Mexico,

Biodiversity informatics is a set of tools that allows free and rapid access to knowledge accumulated in different sources and media such as biological collections and specialized literature, which has facilitated the arrangement, management, analysis, and interpretation of biodiversity in addition to the generation of models; many of them focused on the conservation of biodiversity [1, 2]. The increase in knowledge of biodiversity is seen in a large amount of information from different databases available on the Internet, of which the Global Biodiversity Information Facility (GBIF–www.gbif.org) stands out, housing more than 1000 million records of species distribution (October 2018). This number of records continues growing, as

in Comarca Lagunera, an

Agricultural Region in the

*Alberto González-Zamora and Rebeca Pérez-Morales*

A study of the distribution of 321 taxa of endemic vascular plants of Mexico distributed in Comarca Lagunera, a region of northern central Mexico within the Chihuahuan Desert, was conducted. The analysis consisted in detecting the areas of high richness and with this information propose areas for the conservation of plant biodiversity in this region. The study includes an analysis of species richness at the level of political units (municipalities), vegetation types, and grid cells of 10 × 10 km. Additionally, the corrected weighted endemism index was calculated using the grid cells. The sites with the richest taxa are located in the mountain areas; however, these do not coincide with the sites with the highest index of endemism since a high percentage of taxa have a restricted distribution to one of the proposed units. Thirty-six taxa are recognized with restricted distribution to the boundaries of Comarca Lagunera, most of them considered as microendemics, which have been described in recent years. Therefore, it is necessary to establish biodiversity conservation programs in the region since much of Comarca Lagunera territory is

### **Chapter 4**

Journal of Life on Earth Biodiversity. 2015;16. DOI: 10.1080/14888386.

[32] Moraes RM, Rios-Uzeda B, Moreno LR, Huanca-Huarachi G, Larrea-Alcázar D. Using potential distribution models for patterns of species richness,

endemism, and phytogeography of palm species in Bolivia. Tropical Conservation

[33] Orme CDL, Davies RG, Burgess M, Eigenbrod F, Pickup N, Olson VA, et al. Global hotspots of species richness are not congruent with endemism or threat. Nature. 2005;436:1016-1019. DOI:

[34] Lamoreux JF, Morrison JC, Ricketts TH, Olson DM, Dinerstein E, McKnight MW, et al. Global test of biodiversity concordance and the importance of endemism. Nature. 2006;440:212-214.

Science Journal. 2014;7(1):45-60

10.1038/nature03850

DOI: 10.1038/nature04291

46

2015.1068710

Endemic Species
