International Science Community Association International Research Journal of Biological Sciences 2278 - 3202 6 3 2017 03 10 Diversity and ecology of Pteridophytes in the Skikda region (North East Algeria) 42 47 EN Senthilkumar S.R. 1 Department of Botany, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Sivakumar T. 2 Department of Botany, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Arulmozhi K.T. 3 Physics Wing (DDE), Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Mythili N. 4 Department of Physics, Mohamed Sathak Engineering College, Kilakarai-623806, Ramnad, India S. Geetha 1 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women Sivakasi, Tamilnadu, India Ranjani S. Subha 2 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women Sivakasi, Tamilnadu, India Dutta Dandeswar 1 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Hazarika Protul 2 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Hazarika P. 3 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Das Manotosh 1 Department of Aquaculture Management & Technology, Vidyasagar University, Midnapore, West Bengal, India and Department of Fishery, Govt. of West Bengal, India Hamel Tarek 1 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Boulemtafes Amir 2 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Slimani Abderachid 3 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Madoui Bachir El Mouaz 4 Ecology of terrestrial and aquatic systems laboratory, Badji Mokhtar University, Annaba-23000, Algeria Drid Mohamed Djaber 5 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria > Research Paper 2017 2 14 2017 03 10 The relative diversity and ecology of ferns the region of Skikda (North-East Algeria) were studied with the aim of documenting the pteridophytic flora and habit in this area. We have identified 25 taxa, one of this list is new to the Numidia sector (Pteris vittata L.). This flora is dominated by the rosale Hemicryptophyte biological type with either 60%. On the biogeographic level, we have 8 dominant subcosmopolite species, representing 32% of the studied flora. The rare flora of the region is presented by 10 taxa, 7 species considered as rare to very rare. According to habitat types, the species can be classified into 4 groups: terrestrials (20 species), lithophytes (11 species), epiphytes (1species) and aquatic plants (1 species). Copyright@ International Science Community Association