Abundans av humlor och honungsbin i jordbrukslandskap med eller utan blomremsor och honungsbisamhällen

dc.contributor.authorRiccardo Bommarco
dc.date.accessioned2021-12-07T08:07:56Z
dc.date.available2021-12-07T08:07:56Z
dc.date.issued2021-11-24T13:38:17.610175Z
dc.descriptionVilda bin har minskat i antal och jordbrukare har därför börjat använda även honungsbin tillsammans med blomremsor. För att ta reda på om blomremsor förstärker vilda bin och dämpar konkurrensen från honungsbin har förekomsten av humlor och honungsbin undersökts på 16 platser i Sverige under sommaren 2018 och våren 2019. Se den engelska sidan för utförligare beskrivning.sv_SE
dc.descriptionWild bee declines in agricultural landscapes have led farmers to supplement crops with honey bees. Simultaneously, environmental subsidy and conservation programmes have incentivized farmers to establish flower strips to support wild and managed pollinators. To find out if flower strips enhance, and competition from honey bees suppresses, wild bees in the landscape and across seasons, we surveyed bumble bee and honey bee abundances in 16 sites in Sweden in summer 2018 and spring 2019. The centre of each site (2 km radius) was with or without an annual flower strip, and with or without added honey bee hives. We surveyed bees in each flower strip and in linear habitats in the landscape around each site, such as field edges and road verges. In the following spring, we surveyed bumble bee queen abundance in each site. We show that adding flower strips benefits bumble bee queen abundance the following year, but this effect is diminished if honeybee hives are added. In sites with flower strips, added honey bee hives reduced male bumble bee abundance. Our relatively small flower strip areas bolstered bumble bee population growth across seasons, probably by relieving a resource bottleneck. Adding honey bee hives in combination with flower strips to landscapes with few floral resources should be avoided as it cancelled the positive effect of flower strips.en_EN
dc.description.sponsorshipSveriges lantbruksuniversitet EkoForsksv_SE
dc.description.sponsorshipSwedish university of agricultural sciences EkoForsken_EN
dc.description.version1
dc.identifier.govdocSLU.ekol.2021.4.4.IÄ-10
dc.identifier.urihttps://doi.org/10.5878/tvh8-kx98
dc.identifier.urihttps://archive-harvest.slu.se:8443/jspui/handle/20.500.12703/3922
dc.language.isosv_SEsv_SE
dc.language.isoen_ENen_EN
dc.publisherSveriges lantbruksuniversitet, Institutionen för ekologisv_SE
dc.publisherSwedish University of Agricultural Sciences, Department of Ecologyen_EN
dc.subjectNaturtyper och biotopersv_SE
dc.subjectMarkanvändningsv_SE
dc.subjectArters utbredningsv_SE
dc.subjectHabitats and biotopesen_EN
dc.subjectLand useen_EN
dc.subjectSpecies distributionen_EN
dc.titleAbundans av humlor och honungsbin i jordbrukslandskap med eller utan blomremsor och honungsbisamhällensv_SE
dc.titleBumble bees and honey bee abundances collected in agricultural landscapes with and without flower strips and honey bee hivesen_EN
dc.typedatasetsv_SE
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