Trophic relationships and ecosystem characteristics in a newly-impounded man-made lake in Thailand |
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| Authors: | T. THAPANAND,T. JUTAGATEE,P. WONGRAT,T. LEKCHOLAYUT,C. MEKSUMPUN,& S. JANEKITKARN,A. RODLOI,J. MOREAU,& L. WONGRAT |
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| Affiliation: | Faculty of Fisheries, Kasetsart University, Bangkok, ThailandDepartment of Animal Sciences, Ubon Ratchathani University, Ubon Ratchathani, ThailandFaculty of Fisheries, Kasetsart University, Bangkok, ThailandDepartment of Fisheries, Ministry of Agriculture and Cooperatives, Bangkok, ThailandDepartment of Tropical Fisheries, INP/ENSAT, Castanet Tolosan, FranceFaculty of Fisheries, Kasetsart University, Bangkok, Thailand |
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| Abstract: | Abstract The trophic dynamics of a newly-impounded south east Asian reservoir, Pasak Jolasid, Thailand, monitored from its creation, were constructed using ecopath , a mass-balanced model. The trophic levels (TLs) of 36 ecological groups varied between 1.0 and 3.2. The majority of fish biomass was at the second TL, where the fishery is concentrated. Some food resources (benthic organisms and zooplankton) were not fully used, whereas phytoplankton and benthic algae were important components of the food web, which is based on phytoplankton and detritus. The implications of these findings are discussed in terms of ecological maturity of the ecosystem and possible fishery management of this multi-purpose reservoir. |
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| Keywords: | ecopath Pasak Jolasid reservoir South East Asian reservoirs transfer efficiency trophic dynamics |
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