**4. Discussion**

#### **4.1 Impacts of soil degradation on phytodiversity**

The similarity index of Jaccard was significantly different on all the soil degradation classes and revealed that all soil degradation classes were dissimilar, depending on the floristic composition. The results allowed us to conclude that soil degradation induced modification of the floristic composition of vegetation. This finding

**81**

**Degradation degree**

Biodiversity indicators

Species richness (S)

Chorological index (*I*C)

Life forms index (*I*L)

Dispersal types index (*I*D)

*m: mean; s: standard of deviation ns: not significant difference.*

*\*\*Significant at 0.01.*

*\*\*\*Significant at 0.001.*

**Table 5.**

*Mean, standard deviation and ANOVA of biodiversity indicators soil on each soil degradation classes.*

30.5 5.83 6.21 2.20

0.76

1.70

0.91

1.08

0.38

0.62

0.79

5.956

0.00526\*\*

3.82

2.73

1.70

0.89

1.54

0.78

0.38

5.898

0.00549\*\*

1.64

3.45

0.40

2.44

0.096

1.51

0.62

17.73

1.31e-05\*\*\*

7.2

31.33

4.93

11.33

3.21

16.5

12.08

6.648

0.00324\*\*

**Light**

**m**

**s**

**m**

**s**

**m**

**s**

**m**

**s**

**—**

**—**

**Moderate**

**High**

**Extreme**

**F value**

**Pr (>F)**

*The Impacts of Soil Degradation Effects on Phytodiversity and Vegetation Structure on Atacora…*

*DOI: http://dx.doi.org/10.5772/intechopen.93899*

*The Impacts of Soil Degradation Effects on Phytodiversity and Vegetation Structure on Atacora… DOI: http://dx.doi.org/10.5772/intechopen.93899*

