Mesocosm observations on the ecological response of an aquatic community to sediment contamination |
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| Affiliation: | 1. Deltares, P.O. Box 177, 2600 MH Delft, The Netherlands;2. Technical University of Delft, Faculty of Civil Engineering and Geosciences, P.O. Box 5048, 2600 GA Delft, The Netherlands;1. Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Department of Materials and Ceramic Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;2. Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;3. MagIC-Magnesium Innovation Center, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse1, 21502 Geesthacht, Germany;4. Institute for Materials Science, Faculty of Engineering, Kiel University, Kiel 24103, Germany;1. Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, Department of Chemistry, 11 Arany János st., 400028 Cluj Napoca, Romania;2. University of Pisa, Department of Chemistry and Industrial Chemistry, 3 Giuseppe Moruzzi st., 56124 Pisa, Italy;3. University of Pisa, Department of Civil and Industrial Engineering, 22 C.F Gabba st., 56122 Pisa, Italy |
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| Abstract: | Between 1992 and 1997 the effects of contaminated sediment on an aquatic community were studied in outdoor mesocosms (2m3), one filled with ‘naturally’ polluted sediment from the sedimentation area ‘Ketelmeer’, the other with relatively clean sediment from the shallow lake ‘Oostvaardersplassen’. Negative effects of the contaminated sediment were observed on the population development of the amoeba species Arcella megastoma and Diflugia accuminata, the mysid shrimp Neomysis integer, the microlepidopteran Cataclysta lemnata and the cladoceran community, whereas the biting midge Culex sp. showed a preference for the contaminated system. The reduction of the grazing capacity of the cladoceran community resulted in higher algal densities in the ‘Ketelmeer’ mesocosm despite the fact that nutrient concentrations in the water column of both mesocosms were comparable. |
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