CS39A Zooplankton - Feeding, Reproduction, Growth and Molecular Diversity
Date: Tuesday, June 11, 2002
Time: 10:00:00 AM
Location: View Royal
 
CottenieK, Katholieke Universiteit Leuven, Leuven, Belgium, karl.cottenie@bio.kuleuven.ac.be
De Meester, L, , Katholieke Universiteit Leuven, Leuven, Belgium, luc.demeester@bio.kuleuven.ac.be
 
CONNECTIVITY AND CLADOCERAN SPECIES RICHNESS IN A SMALL INTERCONNECTED POND SYSTEM
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This study reports the relations between cladoceran diversity and possible structuring forces in a highly interconnected pond system with continuous dispersal of individuals through overflows and rivulets. Local species richness in the ponds was found to be higher than that reported for unconnected ponds. Although this indicates an influence from regional structuring forces, no relation was found between local species richness and connectivity, the total number of ponds upstream of the focal pond or spatial configuration. There was a significant relation between local environmental factors and species richness in the ponds studied for two out of the three study years. Environmental variables selected to be important included turbidity measured as Secchi disk depth. Although these results suggest an important impact of stable alternative equilibria in shallow lakes in determining cladoceran diversity, we could also show that the high dispersal rates did result in a general increase in local diversity.