Competition between managed honeybees and wild bumblebees depends on landscape context

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Competition between managed honeybees and wild bumblebees depends on landscape context. / Herbertsson, Lina; Lindström, Sandra A M; Rundlöf, Maj; Bommarco, Riccardo; Smith, Henrik G.

In: Basic and Applied Ecology, Vol. 17, No. 7, 01.11.2016, p. 609-616.

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TY - JOUR

T1 - Competition between managed honeybees and wild bumblebees depends on landscape context

AU - Herbertsson, Lina

AU - Lindström, Sandra A M

AU - Rundlöf, Maj

AU - Bommarco, Riccardo

AU - Smith, Henrik G.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Honeybees might outcompete wild bees by depleting common resources, possibly more so in simplified landscapes where flower-rich habitats have been lost. We tested this by experimentally adding honeybee hives to nine sites while ensuring that ten additional sites were free from hives. The landscape surrounding each geographically separated site either held low (homogeneous landscape) or high (heterogeneous landscape) proportions of semi-natural grassland. Adding honeybees suppressed bumblebee densities in field borders and road verges in homogeneous landscapes whereas no such effect was detected in heterogeneous landscapes. The proportional abundance of bumblebee species with small foraging ranges was lower at honeybee sites than at control sites in heterogeneous landscapes, whereas bumblebee communities in homogeneous landscapes were dominated by a single species with long foraging range irrespective of if honeybees were added or not. We conclude that honeybees can impact bumblebee densities, but that landscape heterogeneity modified this effect.

AB - Honeybees might outcompete wild bees by depleting common resources, possibly more so in simplified landscapes where flower-rich habitats have been lost. We tested this by experimentally adding honeybee hives to nine sites while ensuring that ten additional sites were free from hives. The landscape surrounding each geographically separated site either held low (homogeneous landscape) or high (heterogeneous landscape) proportions of semi-natural grassland. Adding honeybees suppressed bumblebee densities in field borders and road verges in homogeneous landscapes whereas no such effect was detected in heterogeneous landscapes. The proportional abundance of bumblebee species with small foraging ranges was lower at honeybee sites than at control sites in heterogeneous landscapes, whereas bumblebee communities in homogeneous landscapes were dominated by a single species with long foraging range irrespective of if honeybees were added or not. We conclude that honeybees can impact bumblebee densities, but that landscape heterogeneity modified this effect.

KW - Apis mellifera

KW - Bombus

KW - Flower resources

KW - Interspecific competition

KW - Landscape complexity

KW - Pollinators

UR - http://www.scopus.com/inward/record.url?scp=84992223415&partnerID=8YFLogxK

U2 - 10.1016/j.baae.2016.05.001

DO - 10.1016/j.baae.2016.05.001

M3 - Article

VL - 17

SP - 609

EP - 616

JO - Basic and Applied Ecology

T2 - Basic and Applied Ecology

JF - Basic and Applied Ecology

SN - 1618-0089

IS - 7

ER -