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Communication Dans Un Congrès Année : 2023

Toward a Benthic Functional Diversity Approach of the English Channel Coarse Sediments

Résumé

The English Channel is one of the most anthropized marine ecosystems in the world. It is exposed to both multiple anthropogenic activities (development of renewable marine energies, aggregate extraction, dredging and trawling) and natural disturbances (e.g. strong hydrodynamics, extreme events). These pressures occur in a context of climate change and modify the structure of benthic communities. One of the particularities of the English Channel is that it is composed of more than 80% coarse sediments. Traditionally, these habitats have been mainly described using semi-quantitative tools and, more recently, studied from quantitative data to evaluate the functional response of these ecosystems to natural and anthropogenic disturbances. These data coupled with the analysis of biological traits of benthic macrofauna, will allow to better understand ecosystem functioning by linking abiotic parameters, community structure and traits distribution. The two main objectives of this PhD thesis are: (1) acquire a better knowledge of coarse sediments of the Channel in a highly hydrodynamic environment; (2) couple traditional ecology studies (species diversity, abundances and biomasses) with functional diversity calculated from biological traits of species. All the analyses will be based on the exploitation of different data sets describing the evolution of the diversity of coarse benthic communities exposed to various pressures. Thus, this PhD thesis will provide a better understanding of the spatio-temporal organization of the functional diversity of the benthic macrofauna in the eastern English Channel. It will also provide a better understanding of the response of coarse sediment ecosystems to natural and anthropogenic disturbances.
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Dates et versions

hal-04291302 , version 1 (21-11-2023)

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  • HAL Id : hal-04291302 , version 1

Citer

Robin Van Paemelen, Aurore Raoux, Éric Thiébaut, Jean-Philippe Pezy. Toward a Benthic Functional Diversity Approach of the English Channel Coarse Sediments. Coast Caen 2023, Oct 2023, Caen, France. ⟨hal-04291302⟩
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