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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/126

Title: TEMPORAL AND SPATIAL DYNAMICS OF ZOOPLANKTON IN RELATION TO PHYTOPLANKTON VARIATION IN LAKE BABOGAYA (BISHOFTU GUDA), ETHIOPIA
Authors: DENBERE, BELAY
Keywords: Lake Babogaya
zooplankton
phytoplankton
temporal dynamics
vertical migration
Date Added: 21-Sep-2007
Abstract: The zooplankton of a crater lake in Ethiopia, Babogaya, was sampled at 3 stations from June 2006 to April 2007 concurrently with phytoplankton numerical abundance. The spatial and temporal variation in abundance of the dominant crustaceans, Rotifera, Copepoda and Cladocera is discussed. Temporal (months, sampling dates) variation was larger than spatial (station) variation for the mean total zooplankton. All major zooplankton groups showed temporal variations in abundance, with highest densities during wet (June to August) and mixing period (November to January), minimum densities after the end of the big rain in October. Rotifers were the dominant group and made up almost 71% of the total zooplankton abundance. Rotifers showed a maximum density during the dry period and declined after the end of the big rains. Copepods and cladocerans also contributed 23% and 6%, respectively, of the major total zooplankton abundance of the lake. The maximum vertical distribution of total zooplankton was observed at the metalimnon region. The phytoplankton community was dominated by dinoflagllates during the dry season and there was a shift in dominance to diatoms during the long rainy period. The dominant phytoplankton showed distinct seasonality. This study is believed to give a baseline for further research on zooplankton seasonal variation and production that helps in the understanding of fish production and proper management in the study lake.
Description: A Thesis presented to the School of Graduate Studies Addis Ababa University In Partial Fulfillment of the Requirement for the Degree Master of Science in Biology
URI: http://hdl.handle.net/123456789/126
Appears in:Thesis - Biology

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