Phytoplankton Dynamics of Mokolo and Mopa Ponds in Bertoua City (East-Cameroon)  

作　　者：Janvier Kengne Tenkeu Gwladys Joelle Mogue Kamdem Nectaire Lie Nyamsi Tchatcho Narcisse Mvondo Isabelle Appoline Kalieu Wilfried Takam Serge Hubert Zebaze Togouet Janvier Kengne Tenkeu;Gwladys Joelle Mogue Kamdem;Nectaire Lie Nyamsi Tchatcho;Narcisse Mvondo;Isabelle Appoline Kalieu;Wilfried Takam;Serge Hubert Zebaze Togouet(Laboratory of General Biology, Faculty of Science, University of Yaounde I, Yaounde, Cameroon;Department of Aquatic Ecosystems Management, Institute of Fisheries Science of Yabassi, University of Douala, Douala, Cameroon)

机构地区：[1]Laboratory of General Biology, Faculty of Science, University of Yaounde I, Yaounde, Cameroon [2]Department of Aquatic Ecosystems Management, Institute of Fisheries Science of Yabassi, University of Douala, Douala, Cameroon

出　　处：《Open Journal of Ecology》2020年第7期482-496,共15页生态学期刊（英文）

摘　　要：This study aims to improve the understanding of algal community’s dynamics in response to different environmental factors in two dam ponds (Mokolo and Mopa) in the city of Bertoua (East-Cameroon). Physicochemical and biological analyzes were carried out monthly by direct sampling at the surface and using Van Dorn bottle at 1 m depth. The organisms were collected using transparent glass vials of about 500 ml and fixed with 2<span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">5 ml of a lugol solution, then analyzed using the Uterm<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#244;</span></span>hl method. Physicochemical analyzes show low transparency (<</span><span style="font-family:Verdana;">75 cm) of the ponds despite their shallow depth (≤150 cm), high le</span><span style="font-family:Verdana;">vels of dissolved oxygen (></span><span style="font-family:Verdana;">60%)</span><span style="font-family:;" "=""><span style="font-family:Verdana;">, BOD</span>_{<span style="font-family:Verdana;">5</span>}<span style="font-family:Verdana;"> (>30 mg/L) and chlorophyll “a” (></span></span><span style="font-family:Verdana;">30 μg/L). These data made it possible to categorize the Mokolo and Mopa ponds as hypereutrophic with nitrogen as the limiting factor for eutrophication. Biological data show quite diversified ponds with 138 species identifi</span><span style="font-family:;" "=""><span style="font-family:Verdana;">ed in Mokolo Pond and strongly dominated by Diatoms with 2951 ind. representing 46% of the total abundance. In Mopa Pond, 147 species were identified, mainly represented by Chlorophyceae with 3629 ind. representing 52% of the total abundance. </span><i><span style="font-family:Verdana;">Azpeitia</span></i><span style="font-family:Verdana;"></span><i> </i><span style="font-family:Verdana;"><i></i></span><i><i><span style="font-family:Verdana;">africana</span></i><span style="font-family:Verdana;"></span></i> (Mokolo) and <i></i></span><i><i><spanThis study aims to improve the understanding of algal community’s dynamics in response to different environmental factors in two dam ponds (Mokolo and Mopa) in the city of Bertoua (East-Cameroon). Physicochemical and biological analyzes were carried out monthly by direct sampling at the surface and using Van Dorn bottle at 1 m depth. The organisms were collected using transparent glass vials of about 500 ml and fixed with 2<span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">5 ml of a lugol solution, then analyzed using the Uterm<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#244;</span></span>hl method. Physicochemical analyzes show low transparency (<</span><span style="font-family:Verdana;">75 cm) of the ponds despite their shallow depth (≤150 cm), high le</span><span style="font-family:Verdana;">vels of dissolved oxygen (></span><span style="font-family:Verdana;">60%)</span><span style="font-family:;" "=""><span style="font-family:Verdana;">, BOD</span>_{<span style="font-family:Verdana;">5</span>}<span style="font-family:Verdana;"> (>30 mg/L) and chlorophyll “a” (></span></span><span style="font-family:Verdana;">30 μg/L). These data made it possible to categorize the Mokolo and Mopa ponds as hypereutrophic with nitrogen as the limiting factor for eutrophication. Biological data show quite diversified ponds with 138 species identifi</span><span style="font-family:;" "=""><span style="font-family:Verdana;">ed in Mokolo Pond and strongly dominated by Diatoms with 2951 ind. representing 46% of the total abundance. In Mopa Pond, 147 species were identified, mainly represented by Chlorophyceae with 3629 ind. representing 52% of the total abundance. </span><i><span style="font-family:Verdana;">Azpeitia</span></i><span style="font-family:Verdana;"></span><i> </i><span style="font-family:Verdana;"><i></i></span><i><i><span style="font-family:Verdana;">africana</span></i><span style="font-family:Verdana;"></span></i> (Mokolo) and <i></i></span><i><i><span

关 键 词：Bertoua Dynamics Hypereutrophic PHYTOPLANKTON PONDS 

分 类 号：TN2[电子电信—物理电子学]