The response of Daphnia to changes in trophic status and weather patterns : a case study from Lake Constance

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1998
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Geller, Walter
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ICES Journal of Marine Science. 1998, 55(4), pp. 775-782. ISSN 1054-3139. Available under: doi: 10.1006/jmsc.1998.0397
Zusammenfassung

Relationships between changes in trophic status and weather patterns and biomass of Daphnia in Lake Constance were analysed by comparing three long term records conducted at approximately 30-year intervals. These describe the zooplankton of Lake Constance in its oligotrophic (1920-1924), mesotrophic (1952-1962), and finally meso/eutrophic (1979-1995) state. Biomass increased approximately 30-fold from the 1920s to the 1950/60s and 6-fold from the 1950/60s to the I980/90s. The former increase was evident throughout the season, the latter was restricted to the second half of the year. Daphnid biomass has not yet shown any response to the re-oligotrophication process of Lake Constance during the 1980/90s. Within the period 1979-1995, biomass in May was significantly correlated with the North Atlantic Oscillation, whereas the annual average showed no response. The magnitude of inter-annual variation in spring biomass due to climate variability was as large as the long-term response to eutrophication. Because of the key role of daphnids in freshwater ecosystems, even a temporally restricted response to climate forcing might have important consequences for the ecosystem.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
climate variability, Daphnia, eutrophication, Lake Constance, North Atlantic Oscillation, population dynamics
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ISO 690STRAILE, Dietmar, Walter GELLER, 1998. The response of Daphnia to changes in trophic status and weather patterns : a case study from Lake Constance. In: ICES Journal of Marine Science. 1998, 55(4), pp. 775-782. ISSN 1054-3139. Available under: doi: 10.1006/jmsc.1998.0397
BibTex
@article{Straile1998respo-7075,
  year={1998},
  doi={10.1006/jmsc.1998.0397},
  title={The response of Daphnia to changes in trophic status and weather patterns : a case study from Lake Constance},
  number={4},
  volume={55},
  issn={1054-3139},
  journal={ICES Journal of Marine Science},
  pages={775--782},
  author={Straile, Dietmar and Geller, Walter}
}
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