Eutrophication of Lake Hayq in the Ethiopian Highlands |
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| Authors: | Elizabeth K; Getachew T; Taylor WD; Zinabu G-M |
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| Institution: | 1Department of Biology, Addis Ababa University PO Box 1176, Addis Ababa, Ethiopia, Sweden
2Institute of Limnology, Uppsala University Box 557, S-75122, Uppsala, Sweden
3Awassa College of Agriculture PO Box 5, Awassa, Sidamo, Ethiopia |
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| Abstract: | Lake Hayq was previously described as having exceptionally clearwater and very low phytoplankton biomass. It is now very different,with a shallow euphotic depth and abundant phytoplankton. Zooplanktonpopulations have changed as well; Daphnia and Diaphanosoma wererecorded before, whereas we found no Cladocera. Among the possiblecauses for this change in trophic status is the introductionof the planktivorous fish Oreochromis niloticus. |
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