SS3.10 Ecological Implications of Terrestrial Inputs into Lakes and Ponds
Date: Tuesday, June 11, 2002
Location: Poster Session - VCC
 
LambertsD, Laboratory for Aquatic Ecology, Univ. of Leuven, Leuven, Belgium, dirklamberts@yahoo.com
 
PHASES OF FLOODING IN THE TONLE SAP LAKE (CAMBODIA) AND ITS FLOODPLAIN HABITATS, AND THE IMPORTANCE OF DRY SEASON FLOODPLAIN POOLS FOR FISH
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The highly productive Tonle Sap lake of central Cambodia functions as an overflow basin for the Mekong river and shows a five-fold increase in area during several months every year. Diurnal and seasonal variations in water quality parameters of eight different habitats in the Tonle Sap lake and its floodplain are described. A temperature-driven diurnal stratification typical of tropical lakes is present where water depths permit. The sampling results demonstrate different phases in floodplain water quality during flooding, with important ecological consequences for laterally and longitudinally migrating fish species. Permanent pools in the floodplain experience the same phases in water quality evolution during flooding but develop in a particular way during the dry season. The potential of floodplain pools as dry season refuges for fish is described.