Seasonal Shift in Community Structure of Periphytic Ciliates in Estuarine Waters in the Northern Bay of Bengal,Bangladesh |
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| Authors: | Mamun?Abdullah Al Rahman?Muhammed?Forruq Aysha?Akhtar Md?Wahidul?Alam Mohammad?Nurul?Azim?Sikder Alan?Warren Email author" target="_blank">Henglong?XuEmail author |
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| Institution: | 1.Laboratory of Microbial Ecology,Ocean University of China,Qingdao,China;2.Faculty of Marine Sciences and Fisheries,University of Chittagong,Chittagong,Bangladesh;3.College of Fisheries,Ocean University of China,Qingdao,China;4.Department of Life Sciences,Natural History Museum,London,UK |
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| Abstract: | To investigate the seasonal heterogeneity of the periphytic ciliate communities, a 1-year baseline survey was conducted in the Karnaphuli River estuary, northern Bay of Bengal, Bangladesh. A total of 54 ciliate species were recorded, including seven common and 14 dominant species. Maximum species number was in autumn whereas maximum abundance was in winter; the minimum for both occurred in summer. Multivariate analyses, i.e., canonical analysis of principal coordinates (CAP) and principal co-ordinates analysis (PCoA), revealed a clear seasonal heterogeneity of community structure and environmental variables. Multivariate correlation analysis (RELATE) demonstrated that the community structure of the periphytic ciliate communities was significantly correlated with environmental variables, and best matching analysis (BIOENV) indicated that heterogeneity of community patterns was mainly driven by water temperature, pH, dissolved oxygen, total dissolved solids and nutrients. Species richness and diversity peaked in autumn whereas species evenness peaked in summer. These results suggest that environmental conditions shape periphytic ciliate community structure, which is a potentially useful bio-indicator of estuarine water quality. |
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