**2.4.4 Other aquatic habitats**

Fungi may also be found in aquatic habitats with harsh environmental conditions, such as sulfidic springs (Luo et al., 2005), acidic peat bogs and lakes (Thormann, 2006; Voronin, 2010) and volcanic lakes (Sabetta, et al., 2000). When studying fungal diversity in sediments of an estuary, Mohamed & Martiny (2011) found that community composition (at division level) did not differ substantially between fresh, brackish and seawater. However, the proportion of *Chytridiomycetes* and unknown species from basal lineages increased with salinity, and species diversity was at a maximum in the brackish zone. Although several studies have examined the fungi that can be isolated from saline lakes (Butinars et al., 2005; Zalar et al., 2005; Takishita et al., 2007) and mangroves (Suryanarayanand & Kumaresan, 2000; Kumaresan & Suryanarayanan, 2001; Ananda & Sridhar, 2002), fungal biodiversity in these systems requires further investigation.
