Gaëtane Le Provost1,2,3,4, Isabelle Badenhausser1,2,3,5, Cyrille Violle6, Fabrice Requier7, Marie D'Ottavio1,2,3,8, Marilyn Roncoroni1,2,3,9, Louis Gross1,2,3,10, Nicolas Gross9. 1. Centre d'Etudes Biologiques de Chizé UMR 7372, CNRS, Université de La Rochelle, 79360 Villiers en Bois, France. 2. INRAE, USC 1339, Centre d'Etudes Biologiques de Chizé UMR 7372, CNRS, Université de La Rochelle, 79360 Villiers en Bois, France. 3. LTSER « Zone Atelier Plaine & Val de Sèvre », Centre d'Etudes Biologiques de Chizé UMR 7372, CNRS, Université de La Rochelle, 79360 Villiers en Bois, France. 4. Senckenberg Biodiversity and Climate Research Centre SBIK-F, Senckenberg Gesellschaft für Naturforschung, 60325 Frankfurt, Germany. 5. INRAE, Unité de Recherche Pluridisciplinaire Prairies Plantes Fourragères, 86600 Lusignan, France. 6. UMR 5175 CEFE, Univ Montpellier, CNRS, EPHE, IRD, Univ Paul Valéry 3, 34293 Montpellier, France. 7. Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91198 Gif-sur-Yvette, France. 8. Laboratoire de Lutte Biologique, Département des sciences biologiques, Université du Québec à Montréal (UQAM), Succ. Centre-Ville, Montréal, QC C.P. 8888 Canada. 9. Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Ecosystème Prairial, 63000 Clermont-Ferrand, France. 10. INRAE, UR 0633, URZF Unité de Recherche Zoologie Forestière, 45075 Orléans, France.
Abstract
CONTEXT: Global pollinator decline has motivated much research to understand the underlying mechanisms. Among the multiple pressures threatening pollinators, habitat loss has been suggested as a key-contributing factor. While habitat destruction is often associated with immediate negative impacts, pollinators can also exhibit delayed responses over time. OBJECTIVES: We used a trait-based approach to investigate how past and current land use at both local and landscape levels impact plant and wild bee communities in grasslands through a functional lens. METHODS: We measured flower and bee morphological traits that mediate plant-bee trophic linkage in 66 grasslands. Using an extensive database of 20 years of land-use records, we tested the legacy effects of the landscape-level conversion of grassland to crop on flower and bee trait diversity. RESULTS: Land-use history was a strong driver of flower and bee trait diversity in grasslands. Particularly, bee trait diversity was lower in landscapes where much of the land was converted from grassland to crop long ago. Bee trait diversity was also strongly driven by plant trait diversity computed with flower traits. However, this relationship was not observed in landscapes with a long history of grassland-to-crop conversion. The effects of land-use history on bee communities were as strong as those of current land use, such as grassland or mass-flowering crop cover in the landscape. CONCLUSIONS: Habitat loss that occurred long ago in agricultural landscapes alters the relationship between plants and bees over time. The retention of permanent grassland sanctuaries within intensive agricultural landscapes can offset bee decline.
CONTEXT: Global pollinator decline has motivated much research to understand the underlying mechanisms. Among the multiple pressures threatening pollinators, habitat loss has been suggested as a key-contributing factor. While habitat destruction is often associated with immediate negative impacts, pollinators can also exhibit delayed responses over time. OBJECTIVES: We used a trait-based approach to investigate how past and current land use at both local and landscape levels impact plant and wild bee communities in grasslands through a functional lens. METHODS: We measured flower and bee morphological traits that mediate plant-bee trophic linkage in 66 grasslands. Using an extensive database of 20 years of land-use records, we tested the legacy effects of the landscape-level conversion of grassland to crop on flower and bee trait diversity. RESULTS: Land-use history was a strong driver of flower and bee trait diversity in grasslands. Particularly, bee trait diversity was lower in landscapes where much of the land was converted from grassland to crop long ago. Bee trait diversity was also strongly driven by plant trait diversity computed with flower traits. However, this relationship was not observed in landscapes with a long history of grassland-to-crop conversion. The effects of land-use history on bee communities were as strong as those of current land use, such as grassland or mass-flowering crop cover in the landscape. CONCLUSIONS: Habitat loss that occurred long ago in agricultural landscapes alters the relationship between plants and bees over time. The retention of permanent grassland sanctuaries within intensive agricultural landscapes can offset bee decline.
Authors: Mikko Kuussaari; Riccardo Bommarco; Risto K Heikkinen; Aveliina Helm; Jochen Krauss; Regina Lindborg; Erik Ockinger; Meelis Pärtel; Joan Pino; Ferran Rodà; Constantí Stefanescu; Tiit Teder; Martin Zobel; Ingolf Steffan-Dewenter Journal: Trends Ecol Evol Date: 2009-08-06 Impact factor: 17.712
Authors: Yann Clough; Johan Ekroos; András Báldi; Péter Batáry; Riccardo Bommarco; Nicolas Gross; Andrea Holzschuh; Sebastian Hopfenmüller; Eva Knop; Mikko Kuussaari; Regina Lindborg; Lorenzo Marini; Erik Öckinger; Simon G Potts; Juha Pöyry; Stuart Pm Roberts; Ingolf Steffan-Dewenter; Henrik G Smith Journal: Ecol Lett Date: 2014-07-16 Impact factor: 9.492
Authors: Andrea Holzschuh; Matteo Dainese; Juan P González-Varo; Sonja Mudri-Stojnić; Verena Riedinger; Maj Rundlöf; Jeroen Scheper; Jennifer B Wickens; Victoria J Wickens; Riccardo Bommarco; David Kleijn; Simon G Potts; Stuart P M Roberts; Henrik G Smith; Montserrat Vilà; Ante Vujić; Ingolf Steffan-Dewenter Journal: Ecol Lett Date: 2016-08-17 Impact factor: 9.492