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Repositorio Atenea de la Facultad de Ciencias, UNAM >
Repositorio Ciencias >
FACULTAD DE CIENCIAS >
Biología >
Departamento de Biología Comparada >
Laboratorio de Algas Continentales >
Dr. Eberto Novelo Maldonado >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/149539
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Title: | Changes of phytoplankton communities in Lakes Naivasha and Oloidien, examples of degradation and salinization of lakes in the Kenyan Rift Valley |
Authors: | Ballot, A. Kotut, K. Novelo, E. Krienitz, L. Springer ballot@igb-berlin.de Ballot, Krienitz, L.: Leibniz Inst Freshwater Ecol & Inland Fisheries, D-16775 Stechlin, Germany Kotut, K.: Kenyatta Univ Nairobi, Dept Plant & Microbial Sci, Nairobi, Kenya Novelo, E.: Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico |
Issue Date: | 2009 |
Citation: | Ballot, A; Kotut, K; Novelo, E; Krienitz, L. ( 2009 ). Changes of phytoplankton communities in Lakes Naivasha and Oloidien, examples of degradation and salinization of lakes in the Kenyan Rift Valley. Hydrobiologia, 632(1)359-363. |
Abstract: | Increasing degradation of the water quality, caused by overuse and salinization, leads to considerable changes of the phytoplankton composition in Kenyan Rift Valley lakes. Exemplarily, the phytoplankton communities and biomasses of deteriorating freshwater Lake Naivasha and salinizing Lake Oloidien were studied between 2001 and 2005, accompanied by physico-chemical measurements (pH, total phosphorus and nitrogen, alkalinity, conductivity). Over the last three decades, the ecology of these two water basins has been subjected to dramatic changes, caused by excessive use of water and catchment area by man. In L. Naivasha a shift in the dominance of coccoid cyanobacteria towards dominance of Chlorophyceae (Botryococcus terribilis) was observed. Lake Oloidien exhibited a shift in the dominance of coccoid Chlorophyceae towards dominance of cyanobacteria (Arthrospira fusiformis, Anabaenopsis elenkinii). Phytoplankton findings and chemical data demonstrate that L. Naivasha has developed towards a eutrophic freshwater lake while L. Oloidien has progressed towards a hypereutrophic alkaline-saline lake. |
URI: | http://hdl.handle.net/11154/149539 |
ISSN: | 0018-8158 |
Appears in Collections: | Departamento de Biología Comparada Dr. Eberto Novelo Maldonado
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