Wetland cover in agricultural landscapes is positively associated with bumblebee abundance

Author:

Cohen Abigail L.1ORCID,Devries James H.2,Galpern Paul1

Affiliation:

1. Department of Biology University of Calgary Calgary Alberta Canada

2. Ducks Unlimited Canada Stonewall Manitoba Canada

Abstract

Abstract Conversion of land for agricultural use is a leading driver of global biodiversity loss. Natural and semi‐natural lands within agricultural landscapes are targeted for protection because they provide habitat for many organisms. Pothole (or kettle) wetlands occur across the Northern Hemisphere and are a focus for conservation both because of their location within agriculturally intensive landscapes and their importance to vertebrates, especially migratory birds. Recent evidence suggests that wetlands may also be an important habitat for arthropods, including insects that provide ecosystem services. To understand how insects associate with wetlands and landscape features, we examine the relationship between bumblebees (Bombus), and wetland area, cropland area and wetland perimeter‐area ratio. We found that wetland area is significantly positively associated with the occurrence and abundance of the species studied. We also found that the relationship between bumblebees and wetland perimeter‐area ratio varied across the growing season. This suggests that the importance of wetland edge as a foraging habitat varies across the season. These results show the utility of wetlands to bees, though their resources are likely not being used uniformly by all bumblebee species or across the entire growing season. Our results also suggest that pothole wetlands in agricultural landscapes are likely to support biodiversity, and their conservation contributes to overall ecosystem health and function.

Funder

Alberta Biodiversity Monitoring Institute

Alberta Canola Producers Commission

Alberta Conservation Association

Institute for Wetland and Waterfowl Research, Ducks Unlimited Canada

Mitacs

Natural Sciences and Engineering Research Council of Canada

Saskatchewan Canola Development Commission

Publisher

Wiley

Reference57 articles.

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