Skip to Main Content
Habitat amount mediates the effect of fragmentation on a pollinator's reproductive performance, but not on its foraging behaviourAuthor(s): Corina Maurer; Laura Bosco; Elisabeth Klaus; Samuel A. Cushman; Raphael Arlettaz; Alain Jacot
Source: Oecologia. doi: 10.1007/s00442-020-04658-0.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
Download Publication (846.0 KB)
DescriptionAgricultural intensification, with its associated habitat loss and fragmentation, is among the most important drivers of the ongoing pollination crisis. In this quasi-experimental study, conducted in intensively managed vineyards in southwestern Switzerland, we tested the separate and interdependent effects of habitat amount and fragmentation on the foraging activity and reproductive performance of bumblebee Bombus t. terrestris colonies. Based on a factorial design, we selected a series of spatially replicated study sites across a dual gradient of habitat amount (area of ground-vegetated vineyards) and fragmentation (density of ground-vegetated vineyard fields) in a landscape predominantly consisting of vineyards with bare grounds. The foraging activity of individual bumblebees was measured using the radio frequency identification (RFID) technology, and we assessed final colony size to measure reproductive performance. We found an interactive effect of habitat amount and fragmentation on colony size. More specifically, the degree of fragmentation had a negative effect on bumblebee colony size when the amount of habitat was low, while it had a weak positive effect on colony size in landscapes with high amounts of habitat. At the level of individual vineyard fields, ground vegetation cover exerted a positive effect on bumblebee colony size. Fragmentation, but not habitat amount, significantly influenced foraging activity, with more foraging trips in sites with lower degrees of fragmentation. Our results emphasise the importance of studying the separate and interdependent effects of habitat amount and fragmentation to understand their influence on pollinators, providing guidance for optimising the spatial configuration of agricultural landscapes from a biodiversity viewpoint.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMaurer, Corina; Bosco, Laura; Klaus, Elisabeth; Cushman, Samuel A.; Arlettaz, Raphael; Jacot, Alain. 2020. Habitat amount mediates the effect of fragmentation on a pollinator's reproductive performance, but not on its foraging behaviour. Oecologia. doi: 10.1007/s00442-020-04658-0.
KeywordsBombus, connectivity, conservation, RFID, vineyards
- Remnant trees increase bat activity and facilitate the use of vineyards by edge-space bats
- Examining effects of vineyard development on bird populations of California's oak woodlands--use of GIS and power analysis to select study sites
- Bumble bee (Hymenoptera: Apidae) community structure on two sagebrush steppe sites in southern Idaho
XML: View XML