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A heterogeneous landscape does not guarantee high crop pollination
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences. Lund University, Sweden.
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
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Number of Authors: 5
2016 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 283, no 1838, 20161472Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2016. Vol. 283, no 1838, 20161472
Keyword [en]
Brassica napus, forest cover, landscape composition, pollination services, sub-Saharan Africa, yield gaps
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-137535DOI: 10.1098/rspb.2016.1472ISI: 000386195400009OAI: oai:DiVA.org:su-137535DiVA: diva2:1066046
Available from: 2017-01-17 Created: 2017-01-09 Last updated: 2017-01-17Bibliographically approved

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Samnegård, UlrikaHambäck, Peter A.Hylander, Kristoffer
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