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A heterogeneous landscape does not guarantee high crop pollination

Samnegård, Ulrika LU ; Hambäck, Peter A.; Lemessa, Debissa; Nemomissa, Sileshi and Hylander, Kristoffer (2016) In Proceedings of the Royal Society B: Biological Sciences 283(1838).
Abstract

The expansion of pollinator-dependent crops, especially in the developing world, together with reports of worldwide pollinator declines, raises concern of possible yield gaps. Farmers directly reliant on pollination services for food supply often live in regions where our knowledge of pollination services is poor. In a manipulative experiment replicated at 23 sites across an Ethiopian agricultural landscape, we found poor pollination services and severe pollen limitation in a common oil crop. With supplementary pollination, the yield increased on average by 91%. Despite the heterogeneous agricultural matrix, we found a low bee abundance, which may explain poor pollination services. The variation in pollen limitation was unrelated to... (More)

The expansion of pollinator-dependent crops, especially in the developing world, together with reports of worldwide pollinator declines, raises concern of possible yield gaps. Farmers directly reliant on pollination services for food supply often live in regions where our knowledge of pollination services is poor. In a manipulative experiment replicated at 23 sites across an Ethiopian agricultural landscape, we found poor pollination services and severe pollen limitation in a common oil crop. With supplementary pollination, the yield increased on average by 91%. Despite the heterogeneous agricultural matrix, we found a low bee abundance, which may explain poor pollination services. The variation in pollen limitation was unrelated to surrounding forest cover, local bee richness and bee abundance. While practices that commonly increase pollinators (restricted pesticide use, flower strips) are an integral part of the landscape, these elements are apparently insufficient. Management to increase pollination services is therefore in need of urgent investigation.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Brassica napus, Forest cover, Landscape composition, Pollination services, Sub-saharan africa, Yield gaps
in
Proceedings of the Royal Society B: Biological Sciences
volume
283
issue
1838
publisher
Royal Society
external identifiers
  • scopus:84989171968
  • wos:000386195400009
ISSN
0962-8452
DOI
10.1098/rspb.2016.1472
language
English
LU publication?
yes
id
34e50d6a-e29f-4029-bc82-cfb70a77951d
date added to LUP
2016-11-17 07:40:08
date last changed
2017-09-18 11:30:36
@article{34e50d6a-e29f-4029-bc82-cfb70a77951d,
  abstract     = {<p>The expansion of pollinator-dependent crops, especially in the developing world, together with reports of worldwide pollinator declines, raises concern of possible yield gaps. Farmers directly reliant on pollination services for food supply often live in regions where our knowledge of pollination services is poor. In a manipulative experiment replicated at 23 sites across an Ethiopian agricultural landscape, we found poor pollination services and severe pollen limitation in a common oil crop. With supplementary pollination, the yield increased on average by 91%. Despite the heterogeneous agricultural matrix, we found a low bee abundance, which may explain poor pollination services. The variation in pollen limitation was unrelated to surrounding forest cover, local bee richness and bee abundance. While practices that commonly increase pollinators (restricted pesticide use, flower strips) are an integral part of the landscape, these elements are apparently insufficient. Management to increase pollination services is therefore in need of urgent investigation.</p>},
  articleno    = {20161472},
  author       = {Samnegård, Ulrika and Hambäck, Peter A. and Lemessa, Debissa and Nemomissa, Sileshi and Hylander, Kristoffer},
  issn         = {0962-8452},
  keyword      = {Brassica napus,Forest cover,Landscape composition,Pollination services,Sub-saharan africa,Yield gaps},
  language     = {eng},
  month        = {09},
  number       = {1838},
  publisher    = {Royal Society},
  series       = {Proceedings of the Royal Society B: Biological Sciences},
  title        = {A heterogeneous landscape does not guarantee high crop pollination},
  url          = {http://dx.doi.org/10.1098/rspb.2016.1472},
  volume       = {283},
  year         = {2016},
}