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Native bees buffer the negative impact of climate warming on honey bee pollination of watermelon crops

Authors

  • Romina Rader,

    Corresponding author
    • Department of Entomology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
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  • James Reilly,

    1. Department of Entomology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
    2. Department of Ecology, Evolution and Natural Resources, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
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  • Ignasi Bartomeus,

    1. Department of Entomology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
    Current affiliation:
    1. Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
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  • Rachael Winfree

    1. Department of Entomology, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
    2. Department of Ecology, Evolution and Natural Resources, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
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Correspondence: Romina Rader, Department of Physical Geography and Quaternary Geology, Stockholm University, Stockholm, SE 10691, Sweden, tel. +46 707558530, fax +46 8164671, e-mail: RominaRader@gmail.com

Abstract

If climate change affects pollinator-dependent crop production, this will have important implications for global food security because insect pollinators contribute to production for 75% of the leading global food crops. We investigate whether climate warming could result in indirect impacts upon crop pollination services via an overlooked mechanism, namely temperature-induced shifts in the diurnal activity patterns of pollinators. Using a large data set on bee pollination of watermelon crops, we predict how pollination services might change under various climate change scenarios. Our results show that under the most extreme IPCC scenario (A1F1), pollination services by managed honey bees are expected to decline by 14.5%, whereas pollination services provided by most native, wild taxa are predicted to increase, resulting in an estimated aggregate change in pollination services of +4.5% by 2099. We demonstrate the importance of native biodiversity in buffering the impacts of climate change, because crop pollination services would decline more steeply without the native, wild pollinators. More generally, our study provides an important example of how biodiversity can stabilize ecosystem services against environmental change.

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