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Communication Dans Un Congrès Année : 2019

Networking assessment of the Gulf of Lion artificial and natural reefs using biophysical modelling

Résumé

The EU Maritime spatial planning directive was adopted in 2014 in order to provide EU Member states a legal framework to regulate Blue Growth (development of economical activites in the ocean). In essence, this directive impulses a geographical approach to marine activities, expliciting the requirment for coordinating them spatially by sharing them among States members and gathering all knowledge available. Particular emphasis is given to the possibility to anticipate impacts on natural ecosystem functionning and interactions at basin scale. The present work was undergone to assess the added connectivity to natural hard substrates populations associated to the artificial reefs that were deployed in the Gulf of Lions in the last 40 years. Larval transfer probabilities between and within natural and artificial reefs networks were estimated using larval dispersal biophysical modelling based on a high resolution hydro- dynamical model. Reproductive traits a priori differentiating species such as reproductive period in the year and planktonic larval duration were explored to establish specific variants of connectivity patterns. Graph metrics highlighting nodes ecological role in 3 different net- works (fully natural, fully artificial, hybrid natural-artificial) were subsquently computed to help decision making for planning of new activities, particularly marine wind farm develop- ment.
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Dates et versions

hal-03999753 , version 1 (21-02-2023)

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  • HAL Id : hal-03999753 , version 1

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Katell Guizien, Skandar Hentati, Thibaud Tournadre, Sylvain Blouet. Networking assessment of the Gulf of Lion artificial and natural reefs using biophysical modelling. 4th Symposium on Ecological Networks, Sep 2019, Paris, France. ⟨hal-03999753⟩
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