Fine sediment deposition affects biodiversity and density of benthic macroinvertebrates: A case study in the freshwater pearl mussel river Waldaist (Upper Austria) |
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| Institution: | 1. Institute of Hydrobiology and Aquatic Ecosystem Management, Department of Water, Atmosphere, Environment, University of Natural Resources and Life Sciences, Vienna, Max Emanuel Straße 17, 1180 Vienna, Austria;2. Institute of Water Management, Hydrology and Hydraulic Engineering, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences Vienna, Muthgasse 107, 1190 Wien, Austria;3. City of Vienna, Vienna City Administration, Municipal Department 45 – Water Management, Wilhelminenstraße 93, 1160 Vienna, Austria |
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| Abstract: | Fine sediment deposition in stream beds frequently generated by certain land use practices has become an increasing stressor for rivers throughout the world. In this study, the role of fine sediment deposition and its impact on the benthic macro-invertebrate assemblages was investigated in a low mountain freshwater pearl mussel stream, the Waldaist. Communities of unaffected sites and sites under high fine sediment deposition were compared. Distinct reactions of benthic assemblages in fine gravelly habitats were ascertained demonstrating a severe but still underestimated threat for invertebrate biodiversity. |
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| Keywords: | Fine sediment deposition Macroinvertebrates Microhabitat Biodiversity |
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