Mesurer et spatialiser la connectivité pour modéliser les changements des systèmes environnementaux. Approches comparées en écologie du paysage et en géomorphologie

Bourgeois, Marc; Cossart, Étienne; Fressard, Mathieu

doi:10.4000/geomorphologie.11895

Cited by 8 publications

(3 citation statements)

References 66 publications

(100 reference statements)

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“…The species-based approach used in the present study allows the development of an ecological network based on the identification of reference species (Bergès et al, 2010;Foltête et al, 2012;Bourgeois et al, 2017). Therefore, the mapping of this network is based on the characteristics of these selected species (habitat, dispersal, movement, reproduction, etc.…”

Section: Methodsmentioning

confidence: 99%

“…The approach used to identify the reference species was based on the ecological requirements of these species and their movement capacities associated with the ecological quality of the environments (Bergès et al, 2010;Fu et al, 2010). The first objective is to identify the spatial relationships between the home ranges specific to a species (Foltête et al, 2012;Bourgeois et al, 2017). For this method, species data are used for their intrinsic conservation values and a distinction is made between emblematic, heritage, remarkable, and threatened species.…”

Section: Reference Speciesmentioning

confidence: 99%

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Green and blue infrastructure design in a semi-arid region

Boussema

Cohen²,

Allouche

2022

Front. Environ. Sci.

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The Green and Blue Infrastructure (GBI) is a new approach for dealing with biodiversity conservation based on maintaining the ecological networks by ensuring the survival of animal and plant species. GBI is considered a new public policy to avoid the loss of biodiversity by preserving landscape connectivity and protecting natural habitats from fragmentation. Countries including the United States, Canada, the United Kingdom, Italy, Portugal, Japan, China, Brazil, and Turkey are seeking to integrate this concept into their environmental policies. This study proposed a methodology to design a GBI at a regional scale applied to the Sousse region in Tunisia. Two main approaches were used. The first was based on identifying three reference species marked by different dispersal distances. The second applied GIS spatial analysis using the buffer model to help assess the ecological connectivity. The methodology developed comprises five steps. In the first step, a forest habitat sub-frame, a semi-open habitat sub-frame, and a wetland sub-frame were determined from a detailed land-use map. Then, different biodiversity reservoirs were identified. In the third step, buffers varying between 200, 250, and 300 m depending on the dispersal distance of the reference species (Cape hare, North African Hedgehog, and Marbled Teal) were applied around the reservoirs to identify zones of potential connections between them. Next, buffers were also applied to detect fragmentation zones along road networks and built-up areas. Finally, the ecological corridors were mapped from the overlay between zones of potential connections and the fragmentation map. The result was the creation of a GBI of the Sousse region with reservoirs of biodiversity and ecological corridors connecting them. This methodological approach and the characterization of the Sousse city GBI map represent the first innovative research applied in Tunisia. This prototype can be a reference for other local or regional spaces, contributing toward realizing a national GBI and promoting sustainable projects.

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Section: Methodsmentioning

confidence: 99%

Section: Reference Speciesmentioning

confidence: 99%

Green and blue infrastructure design in a semi-arid region

Boussema

Cohen²,

Allouche

2022

Front. Environ. Sci.

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“…This empirical cost attribution method may be criticisable by specialists of each species, but it has the advantage of freeing us from collecting long and costly field data. For this reason, this cost attribution system is frequently used in landscape ecology studies (e.g., Verbeylen et al, 2003;Gurrutxaga et al, 2011;Clauzel et al, 2013;Bourgeois et al, 2018). The final cost assigned to each land-cover class for one species group is the average of the costs assigned for this land-cover class for all the species of this group.…”

Section: Attribution Of Movement Costsmentioning

confidence: 99%

Modelling in the Context of an Environmental Mobilisation: A Graph-Based Approach for Assessing the Landscape Ecological Impacts of a Highway Project

Bourgeois

Sahraoui

2020

Ekológia (Bratislava)

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The construction of highways leads to several environmental and landscape impacts, including the fragmentation of natural habitats for many animal species. Highway projects are therefore generally accompanied by mobilisations from the inhabitants of the areas concerned and environmental associations. This work aims to model the potential impacts of a highway project in France on ecological networks and to study the reception of the results by the opponents of this project. We have adopted a three-step approach. First, a land-cover map of the study area was produced at a fine scale of 10 m resolution. Second, we developed a multi-species approach by defining fifteen species groups representative of different habitats of our study area. Third, the design of landscape graphs and the resulting calculation of connectivity metrics allowed mapping the impact of the highway on multi-species ecological connectivity. Reflexive feedback from comments on these results by the public during a mobilisation day against the highway project allows assessment of the relevance of such a modelling approach in this context.

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Modeling Landscape Connectivity and Ecological Networks

BOURGEOIS

2024

Territorial Analysis of Environments

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Mesurer et spatialiser la connectivité pour modéliser les changements des systèmes environnementaux. Approches comparées en écologie du paysage et en géomorphologie

Cited by 8 publications

References 66 publications

Green and blue infrastructure design in a semi-arid region

Green and blue infrastructure design in a semi-arid region

Modelling in the Context of an Environmental Mobilisation: A Graph-Based Approach for Assessing the Landscape Ecological Impacts of a Highway Project

Modeling Landscape Connectivity and Ecological Networks

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