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Approche comparative des communautés piscicoles lacustres

Abstract : The objective of this thesis was to investigate fish community patterns in the lakes of France
and northeast USA in order to infer the underlying processes. This was achieved using a
macroecological approach. Fish communities displayed patterns of addition and replacement
of species along environmental gradients related to the lakes' local features and geographic
location. The structuring role of biotic interactions was not demonstrated. Human-mediated
species introductions clearly perturb the relation of local vs. regional species richnesses. Land
use in the lakes' catchments appears to modify guild community structure. The response of
community structure along gradients of temperature and lake size displayed convergence
between the lakes of France and northeast USA, thereby indicating that that the availability
of spawning substrates exerts a strong constraint on local communities. These results allow
inferring the potential effect of global warming on lake fish communities. Complementary
studies of assembly rules and metacommunity processes should be fruitful for both basic and
applied ecology.
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Contributor : Pascal Irz <>
Submitted on : Monday, August 7, 2006 - 11:44:05 AM
Last modification on : Tuesday, September 24, 2019 - 11:12:02 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 12:32:06 AM


  • HAL Id : tel-00088836, version 1



Pascal Irz. Approche comparative des communautés piscicoles lacustres. Ecologie, Environnement. Université Montpellier II - Sciences et Techniques du Languedoc, 2006. Français. ⟨tel-00088836⟩



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