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Pollinator communities in strawberry crops - variation at multiple spatial scales.

Ahrenfeldt, E J; Klatt, Björn LU ; Arildsen, J; Trandem, N; Andersson, Georg LU ; Tscharntke, T; Smith, Henrik LU and Sigsgaard, L (2015) In Bulletin of Entomological Research 105(4). p.497-506
Abstract
Predicting potential pollination services of wild bees in crops requires knowledge of their spatial distribution within fields. Field margins can serve as nesting and foraging habitats for wild bees and can be a source of pollinators. Regional differences in pollinator community composition may affect this spill-over of bees. We studied how regional and local differences affect the spatial distribution of wild bee species richness, activity-density and body size in crop fields. We sampled bees both from the field centre and at two different types of semi-natural field margins, grass strips and hedges, in 12 strawberry fields. The fields were distributed over four regions in Northern Europe, representing an almost 1100 km long north-south... (More)
Predicting potential pollination services of wild bees in crops requires knowledge of their spatial distribution within fields. Field margins can serve as nesting and foraging habitats for wild bees and can be a source of pollinators. Regional differences in pollinator community composition may affect this spill-over of bees. We studied how regional and local differences affect the spatial distribution of wild bee species richness, activity-density and body size in crop fields. We sampled bees both from the field centre and at two different types of semi-natural field margins, grass strips and hedges, in 12 strawberry fields. The fields were distributed over four regions in Northern Europe, representing an almost 1100 km long north-south gradient. Even over this gradient, daytime temperatures during sampling did not differ significantly between regions and did therefore probably not impact bee activity. Bee species richness was higher in field margins compared with field centres independent of field size. However, there was no difference between centre and margin in body-size or activity-density. In contrast, bee activity-density increased towards the southern regions, whereas the mean body size increased towards the north. In conclusion, our study revealed a general pattern across European regions of bee diversity, but not activity-density, declining towards the field interior which suggests that the benefits of functional diversity of pollinators may be difficult to achieve through spill-over effects from margins to crop. We also identified dissimilar regional patterns in bee diversity and activity-density, which should be taken into account in conservation management. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Bulletin of Entomological Research
volume
105
issue
4
pages
497 - 506
publisher
Cambridge University Press
external identifiers
  • pmid:25908227
  • wos:000360286600015
  • scopus:84937023720
ISSN
1475-2670
DOI
10.1017/S000748531500036X
language
English
LU publication?
yes
id
efdd766d-bce3-4ec7-8072-574a3cc1949f (old id 5340799)
date added to LUP
2015-04-30 12:28:17
date last changed
2017-01-01 03:56:01
@article{efdd766d-bce3-4ec7-8072-574a3cc1949f,
  abstract     = {Predicting potential pollination services of wild bees in crops requires knowledge of their spatial distribution within fields. Field margins can serve as nesting and foraging habitats for wild bees and can be a source of pollinators. Regional differences in pollinator community composition may affect this spill-over of bees. We studied how regional and local differences affect the spatial distribution of wild bee species richness, activity-density and body size in crop fields. We sampled bees both from the field centre and at two different types of semi-natural field margins, grass strips and hedges, in 12 strawberry fields. The fields were distributed over four regions in Northern Europe, representing an almost 1100 km long north-south gradient. Even over this gradient, daytime temperatures during sampling did not differ significantly between regions and did therefore probably not impact bee activity. Bee species richness was higher in field margins compared with field centres independent of field size. However, there was no difference between centre and margin in body-size or activity-density. In contrast, bee activity-density increased towards the southern regions, whereas the mean body size increased towards the north. In conclusion, our study revealed a general pattern across European regions of bee diversity, but not activity-density, declining towards the field interior which suggests that the benefits of functional diversity of pollinators may be difficult to achieve through spill-over effects from margins to crop. We also identified dissimilar regional patterns in bee diversity and activity-density, which should be taken into account in conservation management.},
  author       = {Ahrenfeldt, E J and Klatt, Björn and Arildsen, J and Trandem, N and Andersson, Georg and Tscharntke, T and Smith, Henrik and Sigsgaard, L},
  issn         = {1475-2670},
  language     = {eng},
  number       = {4},
  pages        = {497--506},
  publisher    = {Cambridge University Press},
  series       = {Bulletin of Entomological Research},
  title        = {Pollinator communities in strawberry crops - variation at multiple spatial scales.},
  url          = {http://dx.doi.org/10.1017/S000748531500036X},
  volume       = {105},
  year         = {2015},
}