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Spatial ecology of a range‐expanding bumble bee pollinator

Molecular methods have greatly increased our understanding of the previously cryptic spatial ecology of bumble bees (Bombus spp.), with knowledge of the spatial ecology of these bees being central to conserving their essential pollination services. Bombus hypnorum, the Tree Bumble Bee, is unusual in...

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Autores principales: Crowther, Liam P., Wright, David J., Richardson, David S., Carvell, Claire, Bourke, Andrew F. G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374649/
https://www.ncbi.nlm.nih.gov/pubmed/30805135
http://dx.doi.org/10.1002/ece3.4722
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author Crowther, Liam P.
Wright, David J.
Richardson, David S.
Carvell, Claire
Bourke, Andrew F. G.
author_facet Crowther, Liam P.
Wright, David J.
Richardson, David S.
Carvell, Claire
Bourke, Andrew F. G.
author_sort Crowther, Liam P.
collection PubMed
description Molecular methods have greatly increased our understanding of the previously cryptic spatial ecology of bumble bees (Bombus spp.), with knowledge of the spatial ecology of these bees being central to conserving their essential pollination services. Bombus hypnorum, the Tree Bumble Bee, is unusual in that it has recently rapidly expanded its range, having colonized much of the UK mainland since 2001. However, the spatial ecology of B. hypnorum has not previously been investigated. To address this issue, and to investigate whether specific features of the spatial ecology of B. hypnorum are associated with its rapid range expansion, we used 14 microsatellite markers to estimate worker foraging distance, nest density, between‐year lineage survival rate and isolation by distance in a representative UK B. hypnorum population. After assigning workers to colonies based on full or half sibship, we estimated the mean colony‐specific worker foraging distance as 103.6 m, considerably less than values reported from most other bumble bee populations. Estimated nest density was notably high (2.56 and 0.72 colonies ha(−1) in 2014 and 2015, respectively), estimated between‐year lineage survival rate was 0.07, and there was no evidence of fine‐scale isolation by distance. In addition, genotyping stored sperm dissected from sampled queens confirmed polyandry in this population (mean minimum mating frequency of 1.7 males per queen). Overall, our findings establish critical spatial ecological parameters and the mating system of this unusual bumble bee population and suggest that short worker foraging distances and high nest densities are associated with its rapid range expansion.
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spelling pubmed-63746492019-02-25 Spatial ecology of a range‐expanding bumble bee pollinator Crowther, Liam P. Wright, David J. Richardson, David S. Carvell, Claire Bourke, Andrew F. G. Ecol Evol Original Research Molecular methods have greatly increased our understanding of the previously cryptic spatial ecology of bumble bees (Bombus spp.), with knowledge of the spatial ecology of these bees being central to conserving their essential pollination services. Bombus hypnorum, the Tree Bumble Bee, is unusual in that it has recently rapidly expanded its range, having colonized much of the UK mainland since 2001. However, the spatial ecology of B. hypnorum has not previously been investigated. To address this issue, and to investigate whether specific features of the spatial ecology of B. hypnorum are associated with its rapid range expansion, we used 14 microsatellite markers to estimate worker foraging distance, nest density, between‐year lineage survival rate and isolation by distance in a representative UK B. hypnorum population. After assigning workers to colonies based on full or half sibship, we estimated the mean colony‐specific worker foraging distance as 103.6 m, considerably less than values reported from most other bumble bee populations. Estimated nest density was notably high (2.56 and 0.72 colonies ha(−1) in 2014 and 2015, respectively), estimated between‐year lineage survival rate was 0.07, and there was no evidence of fine‐scale isolation by distance. In addition, genotyping stored sperm dissected from sampled queens confirmed polyandry in this population (mean minimum mating frequency of 1.7 males per queen). Overall, our findings establish critical spatial ecological parameters and the mating system of this unusual bumble bee population and suggest that short worker foraging distances and high nest densities are associated with its rapid range expansion. John Wiley and Sons Inc. 2019-01-08 /pmc/articles/PMC6374649/ /pubmed/30805135 http://dx.doi.org/10.1002/ece3.4722 Text en © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Crowther, Liam P.
Wright, David J.
Richardson, David S.
Carvell, Claire
Bourke, Andrew F. G.
Spatial ecology of a range‐expanding bumble bee pollinator
title Spatial ecology of a range‐expanding bumble bee pollinator
title_full Spatial ecology of a range‐expanding bumble bee pollinator
title_fullStr Spatial ecology of a range‐expanding bumble bee pollinator
title_full_unstemmed Spatial ecology of a range‐expanding bumble bee pollinator
title_short Spatial ecology of a range‐expanding bumble bee pollinator
title_sort spatial ecology of a range‐expanding bumble bee pollinator
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374649/
https://www.ncbi.nlm.nih.gov/pubmed/30805135
http://dx.doi.org/10.1002/ece3.4722
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