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Trophic relationships and ecosystem characteristics in a newly‐impounded man‐made lake in Thailand
Author(s) -
THAPANAND T.,
JUTAGATEE T.,
WONGRAT P.,
LEKCHOLAYUT T.,
MEKSUMPUN C.,
JANEKITKARN S.,
RODLOI A.,
MOREAU J.,
WONGRAT L.
Publication year - 2009
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1111/j.1365-2400.2008.00601.x
Subject(s) - trophic level , zooplankton , food web , phytoplankton , detritus , benthic zone , biomass (ecology) , fishery , ecosystem , ecology , environmental science , lake ecosystem , ecosystem based management , geography , biology , nutrient
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.