Species richness, distribution, bioindication and ecology of epiphytic lichens in oak forests of Kroumiria, North West of Tunisia
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2015, Vol 7, Issue 1
Abstract
Lichen communities were studied in deciduous oak forests across Kroumiria region, northern west of Tunisia to find out the lichen species richness, make an idea about their ecology, relative distribution and actual statute. All lichen species were collected of mainly all Quercus canariensis Wild and Quercus suber L. trunks from their base up to the highest canopy twigs. Identification of taxa is based on stereo-microscopic examinations and usual chemical tests (K, C, P, I and KC). Results reveal important lichen diversity with 211 species belonging to 63 genera and 36 lichenological families distributed into 8 groups (growth forms). The most represented group is the crustose growth form (about 42%) whereas foliose and fruticose were represented by 64 and 22 species, respectively. Within each group, various taxa known for their high sensitivity to certain toxic air compounds (essentially SO2 and some NOx) have been inventoried (mainly fruticose and foliose). Such taxa qualified as bioindicators reflect a buffer capacity of these forest ecosystems to physical changes of the environment and some stability of their functioning without concealing artificialisation and simplification of the forest environment in response to various activities carried out by rural people and their livestock.
Authors and Affiliations
Ridha El Mokni, Lamia Boutabia Ép. Telailia, Houcine Sebei, Mohamed Hédi El Aouni
Keywords
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