The freshwater shrimp Gammarus lacustris (Malacostraca, Amphipoda) in lakes on the Hardangervidda mountain plateau, southern Norway: distribution and environmental requirements
| Autor: | Trygve Hesthagen, Tore Qvenild, Arne Fjellheim |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
geography
Amphipoda Plateau geography.geographical_feature_category biology Ecology Range (biology) Freshwater shrimp Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 [VDP] biology.organism_classification Gammarus lacustris environmental conditions Brown trout climate change Crustacea Malacostraca lcsh:Zoology distribution Hardangervidda Environmental science Animal Science and Zoology lcsh:QL1-991 fish predation Salmo |
| Zdroj: | Fauna Norvegica Fauna Norvegica, Vol 40 (2020) |
| Popis: | Qvenild T, Hesthagen T and Fjellheim A. 2020. The freshwater shrimp Gammarus lacustris (Malacostraca, Amphipoda) in lakes on the Hardangervidda mountain plateau, southern Norway: distribution and environmental requirements. Fauna norvegica 40: 1–21. The distribution of the amphipod Gammarus lacustris on the Hardangervidda mountain plateau was mapped by screening published data from 245 lakes in 11 and 16 catchments in western and central/eastern areas, respectively. These data are primarily based on stomach analyses of brown trout Salmo trutta. In central/eastern areas, G. lacustris was recorded in 79% of all the lakes examined, while there are only two former records (4%) in the western area. The distribution pattern of G. lacustris on Hardangervidda appears to be related to environmental conditions. The apparent absence of G. lacustris in the western area may be explained by a combined effect of cold water due to higher deposits of snow and water with low ionic strength as a consequence of its bedrock of Precambrian gneisses and granites with little or no moraine cover. However, lakes in central/eastern areas sustain G. lacustris in spite of dilute water, as G. lacustris has been recorded in 89 lakes of which 28% had calcium concentration |
| Databáze: | OpenAIRE |
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