Seasonal and interannual variability of cladoceran communities in two peri-alpine lakes: uncoupled response to the 2003 heat wave

Anneville, O., Molinero, Juan Carlos, Souissi, S. and Gerdeaux, D. (2010) Seasonal and interannual variability of cladoceran communities in two peri-alpine lakes: uncoupled response to the 2003 heat wave Journal of Plankton Research, 32 . pp. 913-925. DOI 10.1093/plankt/fbq004.

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Abstract

Seasonal and interannual dynamics of cladoceran species were analyzed during the period 1995–2003 in two deep peri-alpine lakes morphologically different but subjected to similar regional climatic forcing. The seasonal succession of cladoceran species was characterized and the impact of extreme climatic events on the annual pattern of species succession was assessed. Using a multivariate method, we show that the cladoceran species display marked seasonality patterns that differed in the two lakes. The differences observed between the lakes were driven by
their trophic state, the plankton species composition and the abundance of predators.
We show that the sensitivity of the annual pattern of species succession to extreme weather changes, illustrated by the 2003 heat wave, differs markedly in these two lakes. In Lake Annecy, the annual pattern of cladoceran succession
observed in 2003 is not different from the one usually observed. In contrast, in Lake Geneva, the annual pattern recorded in 2003 is unusual and characterized by the maintenance of herbivorous cladocera during summer. These findings underline the need to consider the morphology of lakes and trophic state in the assessment of ecological responses to global warming. Our results contribute to the
debate about the predictability of the impacts of climate change on aquatic ecosystems, and their extrapolation from one site to another.

Document Type: Article
Keywords: Climatology; climate; heat wave; population dynamics; zooplankton; long-term changes
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1093/plankt/fbq004
ISSN: 1464-3774
Projects: Future Ocean
Date Deposited: 15 Jul 2010 09:57
Last Modified: 06 Jul 2012 14:59
URI: http://eprints.uni-kiel.de/id/eprint/8664

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