Christophe Luczak

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Warming of the global climate is now unequivocal and its impact on Earth' functional units has become more apparent. Here, we show that marine ecosystems are not equally sensitive to climate change and reveal a critical thermal boundary where a small increase in temperature triggers abrupt ecosystem shifts seen across multiple trophic levels. This(More)
For the routine determination of organic matter inmarine sediment, a rough estimate is often obtained bymeasuring the loss of weight on ignition(Difference-On-Ignition method: D.O.I.). This D.O.I. is to beused in ecological studies where organic material insediment is used as an environmental variable amongothers. A review of papers using this method showed(More)
Climate change is having a discernible effect on many biological and ecological processes. Among observed changes, modifications in bird phenology have been widely documented. However, most studies have interpreted phenological shifts as gradual biological adjustments in response to the alteration of the thermal regime. Here we analysed a long-term dataset(More)
Phenological, biogeographic and community shifts are among the reported responses of marine ecosystems and their species to climate change. However, despite both the profound consequences for ecosystem functioning and services, our understanding of the root causes underlying these biological changes remains rudimentary. Here, we show that a significant(More)
From 1999 to 2005, studies carried out in the frame of regional and national French programs aimed to determine whether the Phaeocystis globosa bloom affected the intertidal benthic communities of the French coast of the eastern English Channel in terms of composition and/or functioning. Study sites were chosen to cover most of the typical shore types(More)
Ecological Niche Models (ENMs) are increasingly used by ecologists to project species potential future distribution. However, the application of such models may be challenging, and some caveats have already been identified. While studies have generally shown that projections may be sensitive to the ENM applied or the emission scenario, to name just a few,(More)
Beyond the direct influence of climate change on species distribution and phenology, indirect effects may also arise from perturbations in species interactions. Infectious diseases are strong biotic forces that can precipitate population declines and lead to biodiversity loss. It has been shown in forest ecosystems worldwide that at least 10% of trees are(More)
This paper presents the first record of Ptilohyale littoralis (Stimpson, 1853) and Boccardia proboscidea (Hartman, 1940) from the French coast of the eastern English Channel. This record is the second for P. littoralis in European waters following a record from the Netherlands, which is suspected as the site of initial introduction from the Atlantic coast(More)
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