Effects of hedgerows on bats and bush crickets at different spatial scales |
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| Institution: | 1. French National Museum of Natural History, Centre d''Ecologie et des Sciences de la Conservation (CESCO UMR7204), MNHN-CNRS-UPMC, 55 rue Buffon, 75005 Paris, France;2. EDF R&D, EPI Department, Site des Renardières, Ecuelles 77818 Moret sur Loing cedex, France;1. Departamento El Hombre y su Ambiente, Laboratorio de Ecología, Sistemática y Fisiología Vegetal, Universidad Autónoma Metropolitana Xochimilco, Calzada del Hueso 1100, Col Villa Quietud, 04960, México DF, Mexico;2. Instituto de Ecología, Universidad Nacional Autónoma de México (UNAM), Departamento de Ecología de la Biodiversidad, Laboratorio de Genética y Ecología, Apartado Postal 70-275, Ciudad Universitaria UNAM, 04510 México DF, Mexico;3. Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Mexico;1. Univ. Perpignan Via Domitia, CEntre de Formation et de Recherche sur les Environnements Méditerranéens, UMR 5110, F-66860, Perpignan, France;2. CNRS, CEntre de Formation et de Recherche sur les Environnements Méditerranéens, UMR 5110, F-66860, Perpignan, France;3. LabEx « CORAIL » – USR 3278 CNRS-EPHE-UPVD, Centre de Recherche Insulaire et Observatoire de l''Environnement (CRIOBE), BP 1013, 98 729, Papetoai, Moorea, French Polynesia;1. Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, D-10315 Berlin, Germany;2. Animal Ecology, Institute of Biochemistry and Biology, University of Potsdam, Maulbeerallee 2a, D-14469 Potsdam, Germany;3. Institute of Evolutionary Ecology and Conservation Genomics, University of Ulm, Albert- Einstein-Allee 11, D- 89069 Ulm, Germany;4. Department of Animal Behaviour, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany;1. Equipe de Neuro-Ethologie Sensorielle ENES/Neuro-PSI, CNRS UMR 9197, University of Lyon/Saint-Etienne, 23 rue Docteur Paul Michelon, Saint-Etienne Cedex 2, France;2. Unité Faune de Montagne, Direction de la Recherche et de l''Expertise, Office National de la Chasse et de la Faune Sauvage, 90, impasse les Daudes, 74320 Sevrier, France;3. Unité Faune de Montagne, Direction de la Recherche et de l''Expertise, Office National de la Chasse et de la Faune Sauvage, Espace Alfred Sauvy, 66500 Prades, France;4. Cellule d''appui méthodologique, Direction de la Recherche et de l''Expertise, Office National de la Chasse et de la Faune Sauvage, Saint Benoist, BP 20, 78612 Le Perray-en-Yvelines, France;5. Groupe de Recherches et d’Information sur la Faune dans les Ecosystèmes de Montagne, Samoëns, France;6. Laboratoire de Biotechnologies Végétales appliquées aux Plantes Aromatiques et Médicinales, FRE CNRS 3727 – EA 3061, Université de Lyon/Saint-Etienne, 23 rue Docteur Paul Michelon, Saint-Etienne Cedex 2, France |
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| Abstract: | Biodiversity is threatened by the loss and fragmentation of habitats. The role of hedgerows in maintaining biodiversity is well established, but few studies have addressed the importance for biodiversity of the intrinsic characteristics of hedgerows and the quality of hedgerow networks along a spatial scale. We examined three quality indices providing information at different territorial levels: density in the landscape, structural diversity and wood production. We performed an acoustic survey in a grassland to estimate the species abundance and community composition of bats (9 taxa) and bush crickets (11 species). Using an approach based on species and traits, we assessed how hedgerow quality influenced the activity of these taxa at different spatial scales (from 50 to 1000 m) and focused on three types of traits: bush cricket mobility ability, bat foraging strategy and habitat specialization. In general, our results showed the importance of hedgerow quality for bats and bush crickets, but the strength of the association between taxa and hedgerows varied substantially among the species and the spatial scales. Although it depends on the taxa, the production, density and structural diversity of hedgerows each had an overall positive effect. Our results suggested that these effects were generally more important at large scales. The scale effect of the production index is the best predictor of activity for bat and bush cricket taxa and traits. Our results showed the importance of hedgerow quality for the ecology of bat and bush cricket communities and could be used to improve conservation management. |
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| Keywords: | Hedgerows Scale effect Chiroptera Orthoptera Acoustic monitoring Conservation |
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