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Zooplankton Community Structure and Inter‐Annual Dynamics in Two Sand‐Pit Lakes with Different Dredging Impact
Author(s) -
Tavernini Silvia,
Viaroli Pierluigi,
Rossetti Giampaolo
Publication year - 2009
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.200811124
Subject(s) - zooplankton , dredging , abundance (ecology) , plankton , ecology , environmental science , community structure , water column , oceanography , fishery , biology , geology
Zooplankton seasonal and inter‐annual dynamics were investigated in two neighbouring sand‐pit lakes with similar morphological features but different exploitation regime. We hypothesized that the dredging activities affected the zooplankton communities and the hydrochemical conditions of the studied lakes. Significant differences in zooplankton abundance were found. The analysis of similarity (ANOSIM) revealed that plankton communities were different between lakes and that the microcrustaceans largely contributed to the average dissimilarity. In particular, the lower densities of cladocerans and the presence of large‐size species in the lake still under dredging during this study appeared to be related to the resuspension of sand in the water column. We report how the zooplankton communities evolved toward an higher taxonomical and functional diversity after conclusion of the dredging activities. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)