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Crop pests and predators exhibit inconsistent responses to surrounding landscape composition

Daniel S. Karp Rebecca Chaplin-Kramer Timothy D. Meehan Emily A. Martin Fabrice Declerck Heather Grab Claudio Gratton Lauren Hunt Ashley E. Larsen Alejandra Martínez-Salinas Megan E. O’rourke Adrien Rusch Katja Poveda Mattias Jonsson Jay A. Rosenheim Nancy A. Schellhorn Teja Tscharntke Stephen D. Wratten Wei Zhang Aaron L. Iverson Lynn S. Adler Matthias Albrecht Audrey Alignier Gina M. Angelella Muhammad Zubair Anjum Jacques Avelino Péter Batáry Johannes M. Baveco Felix J. J. A. Bianchi Klaus Birkhofer Eric W. Bohnenblust Riccardo Bommarco Michael J. Brewer Berta Caballero-López Yves Carrière Luísa G. Carvalheiro Luis Cayuela Mary Centrella Dominic Charles Henri Ariane Chabert 1 Alejandro C. Costamagna Aldo de la Mora Joop de Kraker Nicolas Desneux Eva Diehl Tim Diekötter Carsten F. Dormann James O. Eckberg Martin H. Entling Daniela Fiedler Pierre Franck F. J. Frank van Veen Thomas Frank Vesna Gagic Michael P. D. Garratt Awraris Getachew David J. Gonthier Peter B. Goodell Ignazio Graziosi Russell L. Groves Geoff M. Gurr Zachary Hajian-Forooshani George E. Heimpel John D. Herrmann Anders S. Huseth Diego J. Inclán Adam J. Ingrao Phirun Iv Katja Jacot Gregg A. Johnson Laura Jones Marina Kaiser Joe M. Kaser Tamar Keasar Tania N. Kim Miriam Kishinevsky Douglas A. Landis Blas Lavandero Claire Lavigne Anne Le Ralec 2 Debissa Lemessa Deborah K. Letourneau Heidi Liere Yanhui Lu Yael Lubin Tim Luttermoser Bea Maas Kevi Mace Filipe Madeira Viktoria Mader Anne Marie Cortesero 2 Lorenzo Marini Eliana Martinez Holly M. Martinson Philippe Menozzi Matthew G. E. Mitchell Tadashi Miyashita Gonzalo A. R. Molina Marco A. Molina-Montenegro Matthew E. O’neal Itai Opatovsky Sebaastian Ortiz-Martinez Michael Nash Annie Ouin 1 Damie Pak Daniel Paredes Soroush Parsa Hazel Parry Ricardo Perez-Alvarez David J. Perović Julie A. Peterson Sandrine Petit Stacy M. Philpott Manuel Plantegenest 2 Milan Plećaš Therese Pluess Xavier Pons Simon G. Potts Richard F. Pywell David W. Ragsdale Tatyana A. Rand Lucie Raymond 2 Benoît Ricci Chris Sargent Jean-Pierre Sarthou 1 Julia Saulais 2 Jessica Schäckermann Nick P. Schmidt Gudrun Schneider Christof Schüepp Frances S. Sivakoff Henrik G. Smith Kaitlin Stack Whitney Sonja Stutz Zsofia Szendrei Mayura B. Takada Hisatomo Taki Giovanni Tamburini Linda J. Thomson Yann Tricault Noelline Tsafack Matthias Tschumi Muriel Valantin-Morison Mai van Trinh Wopke van der Werf Kerri T. Vierling Ben P. Werling Jennifer B. Wickens Victoria J. Wickens Ben A. Woodcock Kris Wyckhuys Haijun Xiao Mika Yasuda Akira Yoshioka Yi Zou
Abstract : The idea that noncrop habitat enhances pest control and represents a win-win opportunity to conserve biodiversity and bolster yields has emerged as an agroecological paradigm. However, while noncrop habitat in landscapes surrounding farms sometimes benefits pest predators, natural enemy responses remain heterogeneous across studies and effects on pests are inconclusive. The observed heterogeneity in species responses to noncrop habitat may be biological in origin or could result from variation in how habitat and biocontrol are measured. Here, we use a pest-control database encompassing 132 studies and 6,759 sites worldwide to model natural enemy and pest abundances, predation rates, and crop damage as a function of landscape composition. Our results showed that although landscape composition explained significant variation within studies, pest and enemy abundances, predation rates, crop damage, and yields each exhibited different responses across studies, sometimes increasing and sometimes decreasing in landscapes with more noncrop habitat but overall showing no consistent trend. Thus, models that used landscape-composition variables to predict pest-control dynamics demonstrated little potential to explain variation across studies, though prediction did improve when comparing studies with similar crop and landscape features. Overall, our work shows that surrounding noncrop habitat does not consistently improve pest management, meaning habitat conservation may bolster production in some systems and depress yields in others. Future efforts to develop tools that inform farmers when habitat conservation truly represents a win-win would benefit from increased understanding of how landscape effects are modulated by local farm management and the biology of pests and their enemies.
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Daniel S. Karp, Rebecca Chaplin-Kramer, Timothy D. Meehan, Emily A. Martin, Fabrice Declerck, et al.. Crop pests and predators exhibit inconsistent responses to surrounding landscape composition. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2018, 115 (3), pp.1-8. ⟨10.1073/pnas.1800042115⟩. ⟨hal-02134898⟩

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