The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield : a quantitative synthesis

Albrecht, Matthias and Kleijn, David and Williams, Neal M. and Tschumi, Matthias and Blaauw, Brett R. and Bommarco, Riccardo and Campbell, Alistair J. and Dainese, Matteo and Drummond, Francis A. and Entling, Martin H. and Ganser, Dominik and Arjen de Groot, G. and Goulson, Dave and Grab, Heather and Hamilton, Hannah and Herzog, Felix and Isaacs, Rufus and Jacot, Katja and Jeanneret, Philippe and Jonsson, Mattias and Knop, Eva and Kremen, Claire and Landis, Douglas A. and Loeb, Gregory M. and Marini, Lorenzo and McKerchar, Megan and Morandin, Lora and Pfister, Sonja C. and Potts, Simon G. and Rundlöf, Maj and Sardiñas, Hillary and Sciligo, Amber and Thies, Carsten and Tscharntke, Teja and Venturini, Eric and Veromann, Eve and Vollhardt, Ines M.G. and Wäckers, Felix and Ward, Kimiora and Wilby, Andrew and Woltz, Megan and Wratten, Steve and Sutter, Louis (2020) The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield : a quantitative synthesis. Ecology Letters, 23 (10). pp. 1488-1498. ISSN 1461-023X

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Abstract

Floral plantings are promoted to foster ecological intensification of agriculture through provisioning of ecosystem services. However, a comprehensive assessment of the effectiveness of different floral plantings, their characteristics and consequences for crop yield is lacking. Here we quantified the impacts of flower strips and hedgerows on pest control (18 studies) and pollination services (17 studies) in adjacent crops in North America, Europe and New Zealand. Flower strips, but not hedgerows, enhanced pest control services in adjacent fields by 16% on average. However, effects on crop pollination and yield were more variable. Our synthesis identifies several important drivers of variability in effectiveness of plantings: pollination services declined exponentially with distance from plantings, and perennial and older flower strips with higher flowering plant diversity enhanced pollination more effectively. These findings provide promising pathways to optimise floral plantings to more effectively contribute to ecosystem service delivery and ecological intensification of agriculture in the future.