Species composition and seasonal dynamics of water mites (Hydracarina) in a mountain stream (Steina,Black Forest,southern Germany) |
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Authors: | Elisabeth I. Meyer |
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Affiliation: | (1) Swiss Federal Institute for Environmental Science and Technology (EAWAG), Swiss Federal Institute of Technology (ETH), CH-8600 Dübendorf, Switzerland |
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Abstract: | The species composition and seasonal dynamics of water mites were studied in a small softwater stream in southern Germany from October 1986 to November 1988. On average water mites contributed 5.5% by abundance and 1.8% by biomass to the total invertebrate community. Annual densities and biomasses averaged 623–1057 (mean 905) individuals M–2 and 45.9–75.6 mg (mean 64.0) dry mass m–2, respectively. 41 species were identified, Torrenticola elliptica (Torrenticolidae) being the most abundant. Nearly every taxon showed a distinct and consistent seasonality, with maximum abundance and biomass in summer and minimum values in winter. Both abundance and biomass of water mites were significantly correlated with water temperature (p < 0.001). |
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Keywords: | water mites species composition abundance biomass seasonal dynamics stream |
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