Meteorological forcing of plankton dynamics in a large and deep continental European lake

Straile, Dietmar

Meteorological forcing of plankton dynamics in a large and deep continental European lake

Dateien

Meteorological_forcing_of_plankton_dynamics_in_a_large_and_deep_continental_European_lake.pdfGröße: 85.94 KBDownloads: 525

Datum

2000

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Oecologia. 2000, 122(1), pp. 44-50. ISSN 0029-8549. Available under: doi: 10.1007/PL00008834

Zusammenfassung

The timing of various plankton successional events in Lake Constance was tightly coupled to a largescale meteorological phenomenon, the North Atlantic Oscil- lation (NAO). A causal chain of meteorological, hydrological, and ecological processes connected the NAO as well as winter and early spring meteorological conditions to planktonic events in summer leading to a remarkable memory of climatic effects lasting over almost half a year. The response of Daphnia to meteorological forcing was most probably a direct effect of altered water temperatures on daphnid growth and was not mediated by changes in phytoplankton concentrations. High spring water temperatures during high-NAO years enabled high population growth rates, resulting in a high daphnid biomass as early as May. Hence, a critical Daphnia biomass to suppress phytoplankton was reached earlier in high-NAO years yielding an early and longerlasting clear-water phase. Finally, an earlier summer decline of Daphnia produced in a negative relation- ship between Daphnia biomass in July and the NAO. Meteorological forcing of the seasonal plankton dynamics in Lake Constance included simple temporal shifts of processes and successional events, but also complex changes in the relative importance of different mechanisms. Since Daphnia plays an important role in plankton succession, a thorough understanding of the regulation of its popu- lation dynamics provides the key for predictions of the response of freshwater planktonic food webs to global climate change.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

NAO, Daphnia, Populations dynamics, Seasonal succession, Ecological memory

Zitieren

ISO 690

STRAILE, Dietmar, 2000. Meteorological forcing of plankton dynamics in a large and deep continental European lake. In: Oecologia. 2000, 122(1), pp. 44-50. ISSN 0029-8549. Available under: doi: 10.1007/PL00008834

BibTex

@article{Straile2000Meteo-7907,
  year={2000},
  doi={10.1007/PL00008834},
  title={Meteorological forcing of plankton dynamics in a large and deep continental European lake},
  number={1},
  volume={122},
  issn={0029-8549},
  journal={Oecologia},
  pages={44--50},
  author={Straile, Dietmar}
}

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