Opportunities to reduce pollination deficits and address production shortfalls in an important insect pollinated crop

Michael P.D. Garratt, G. A. de Groot, Matthias Albrecht, Jordi Bosch, Tom D. Breeze, Michelle T. Fountain, Alex. M. Klein, Megan McKerchar, M. Park, Robert J. Paxton, Simon G. Potts, Gesine Pufal, Romina Rader, Grace D. Senapathi, Georg K. S. Andersson, Olivia M. Bernauer, Eleanor J. Blitzer, Virginie Boreux, Alistair Campbell, Claire CarvellRita Földesi, Daniel García, Lucas A. Garibaldi, Peter A. Hambäck, Giorgi Kirkitadze, Aniko Kovács‐Hostyánszki, Kyle T. Martins, Marcos Miñarro, Rory O’Connor, Rita Radzeviciute, Laura Roquer‐Beni, Ulrika Samnegård, Lorraine Scott, Nicolas J. Vereecken, Felix Wäckers, Sean Webber, George Japoshvili, Aigul Zhusupbaeva

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Abstract

Pollinators face multiple pressures and there is evidence of populations in decline. As demand for insect-pollinated crops increases, crop production is threatened by shortfalls in pollination services. Understanding the extent of current yield deficits due to pollination and identifying opportunities to protect or improve crop yield and quality through pollination management is therefore of international importance. To explore the extent of ‘pollination deficits’, where maximum yield is not being achieved due to insufficient pollination, we use an extensive dataset on a globally important crop, apples. We quantified how these deficits vary between orchards and countries as well as compare ‘pollinator dependence’ across different apple varieties. We found evidence of pollination deficits and in some cases, risks of over-pollination were even apparent where fruit quality could be reduced by too much pollination. In almost all regions studied we found some orchards performing significantly better than others, in terms of avoiding a pollination deficit and crop yield shortfalls due to sub-optimal pollination. This represents an opportunity to improve production through better pollinator and crop management. Our findings also demonstrate that pollinator dependence varies considerably between apple varieties in terms of fruit number and fruit quality. We propose that assessments of pollination service and deficits in crops can be used to quantify supply and demand for pollinators and help target local management to address deficits although crop variety has a strong influence on the role of pollinators.
Original languageEnglish
Article numbere02445
JournalEcological Applications
Early online date27 Aug 2021
DOIs
Publication statusEarly online date - 27 Aug 2021

Keywords

  • Ecology

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