European blue and green infrastructure network strategy vs. the common agricultural policy. Insights from an integrated case study (Couesnon, Brittany)
| Type | Article | ||||||||||||
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| Date | 2022-09 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Houet Thomas1, 8, Palka Gaetan1, 8, Rigo Roberta1, 8, Boussard Hugues2, 8, Jacques Baudry2, 8, Poux Xavier3, Narcy Jean-Baptiste3, Alvarez Martinez José Manuel4, Balbi Stefano5, Mony Cendrine6, 8, Lecoq Lucie6, 8, Beganton Johanna7, Barquin José4 | ||||||||||||
| Affiliation(s) | 1 : CNRS – UMR LETG-Rennes, University of Rennes 2, France 2 : UMR 0980 BAGAP, INRAE-ESA-Institut Agro Rennes Angers, 65 Rue de Saint-Brieuc, 35042 Rennes Cedex, France 3 : AScA Paris, France 4 : IHCantabria – Instituto de Hidráulica Ambiental de la Universidad de Cantabria, Spain 5 : BC3 – Basque Centre for Climate Change, Spain 6 : UMR ECOBIO CNRS, University of Rennes 1, France 7 : UMR AMURE, University of Brest, France 8 : LTSER Zone Atelier Armorique, France |
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| Source | Land Use Policy (0264-8377) (Elsevier BV), 2022-09 , Vol. 120 , P. 106277 (13p.) | ||||||||||||
| DOI | 10.1016/j.landusepol.2022.106277 | ||||||||||||
| WOS© Times Cited | 4 | ||||||||||||
| Keyword(s) | Landscape connectivity, Biodiversity, Land use and cover changes, Modeling, Participatory approach, Environmental policies | ||||||||||||
| Abstract | Urbanization and agricultural intensification are the main drivers of biodiversity losses through multiple stressors, especially habitat fragmentation, isolation and loss. Designing Blue and Green Infrastructure Networks (BGIN) has been recommended as a potential tool for land-use planning to increase ecosystem services while preserving biodiversity. All municipalities in France are required to perform BGIN planning. This article focuses on the Couesnon watershed (Brittany, France) and the participatory process used to define and analyze five possible pathways of future land-use and land-cover changes that included implementation of BGINs. Impacts on biodiversity were estimated by quantifying the change in landscape connectivity of woodlands, grasslands and wetlands. The effectiveness of BGIN policies was assessed by comparing current landscape connectivity (2018) to those in possible futures. Landscape connectivity referred to functional connectivity for three indicator species (Abax parallelepipedus, Maniola jurtina and Arvicola sapidus) across three landscape features: woodlands, grasslands and wetlands, respectively. Results allowed impacts of urban and agricultural land-use changes to be identified in terms of extent and quality. If BGIN policies were applied effectively to control the expansion of gray infrastructure, they would help increase the area and the quality of grassland and woodland connectivity by no more than 2%. Agricultural land-use and land-cover changes could have more impact on the extent of grassland (−82% to +38%) and wetland (−49% to +47%) connectivity. Current and future trends for hedgerows implied a decrease in woodland connectivity of 9.8–33.8%. Impacts on the quality of landscape connectivity is not proportional with the extent, as a decrease of the latter can have relatively more negative impacts on the former, and inversely. The study highlights that the BGIN strategy can preserve landscape connectivity effectively in urban ecosystems, where human density is higher, but can be threatened by agricultural intensification. |
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