Ecological networks in agricultural landscapes: an interdisciplinary approach in the French bocage

Burel Françoise, Ernoult A., Mony C., Butet A., Gil-Tena A., Hervé-Fournerau N., Langlais A., Inserguet-Brisset V., Betbeder Julie, Hubert-Moy Laurence, Baudry Jacques. 2015. Ecological networks in agricultural landscapes: an interdisciplinary approach in the French bocage. . IALE. Portland : IALE, Résumé, 1 p. IALE World Congress. 9, Portland, États-Unis, 5 Juillet 2015/10 Juillet 2015.

Résumé : A recent environmental law in France,”trame verte et bleue; loi Grenelle” aims at designing ecological networks all over the country to combat habitat fragmentation as well as, protect biodiversity and ecosystem services. Regional plans for areas of high biodiversity and species richness, as well as potential corridors to connect them, have been designed and must now be implemented at the municipality scale. We developed an interdisciplinary research to study how ecological networks should be identified and which regulation policies will permit their implementation and protection. Despite a huge scientific literature on ecological networks, connectivity and corridors it is still not obvious how to identify and implement them within a given area. Using network graph theory we measured connectivity among woodlots and showed that it had no effect on woodland bird species richness but, was related to a decrease in species similarity. We developed new methods, using synthetic aperture radar (SAR) data to better describe habitat quality within corridors and improve biodiversity modelling. A parallel case study of current regulations in urban planning, environmental management and agriculture practices showed that uncertainty in identifying ecological networks brings also uncertainty in regulation making. The main tool for the moment is based on urban planning, and a specific corridor regulation exists but its application requires a strong dialog between ecological and policy sciences.

Mots-clés libres : Ecological networks, Landscape mosaics, DIVA

Auteurs et affiliations

• Burel Françoise, CNRS (FRA)
• Ernoult A.
• Mony C.
• Butet A.
• Gil-Tena A.
• Hervé-Fournerau N.
• Langlais A.
• Inserguet-Brisset V.
• Betbeder Julie, Université de Rennes 2 (FRA)
• Hubert-Moy Laurence, Université de Rennes 2 (FRA)
• Baudry Jacques, INRA (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/595163/)

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