Stephane A.P. Derocles
Climate-warming alters the structure of farmland tri-trophic ecological networks and reduces crop yield
Derocles, Stephane A.P.; Lunt, David H.; Berthe, Sophie C.F.; Nichols, Paul C.; Moss, Ellen D.; Evans, Darren M.
Authors
Dr Dave Lunt D.H.Lunt@hull.ac.uk
Senior lecturer
Sophie C.F. Berthe
Paul C. Nichols
Ellen D. Moss
Darren M. Evans
Abstract
It is unclear how sustained increases in temperature and changes in precipitation, as a result of climate change, will affect crops and their interactions with agricultural weeds, insect pests and predators, due to the difficulties in quantifying changes in such complex relationships. We simulated the combined effects of increasing temperature (by an average of 1.4°C over a growing season) and applying additional rainwater (10% of the monthly mean added weekly, 40% total) using a replicated, randomized block experiment within a wheat crop. We examined how this affected the structure of 24 quantitative replicate plant–aphid–parasitoid networks constructed using DNA-based methods. Simulated climate warming affected species richness, significantly altered consumer–resource asymmetries and reduced network complexity. Increased temperature induced an aphid outbreak, but the parasitism rates of aphids by parasitoid wasps remained unchanged. It also drove changes in the crop, altering in particular the phenology of the wheat as well as its quality (i.e., fewer, lighter seeds). We discuss the importance of considering the wider impacts of climate change on interacting species across trophic levels in agroecosystems.
Citation
Derocles, S. A., Lunt, D. H., Berthe, S. C., Nichols, P. C., Moss, E. D., & Evans, D. M. (2018). Climate-warming alters the structure of farmland tri-trophic ecological networks and reduces crop yield. Molecular ecology, 27(23), 4931-4946. https://doi.org/10.1111/mec.14903
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 3, 2018 |
Online Publication Date | Oct 22, 2018 |
Publication Date | 2018-12 |
Deposit Date | Apr 1, 2022 |
Publicly Available Date | Apr 21, 2022 |
Journal | Molecular Ecology |
Print ISSN | 0962-1083 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 27 |
Issue | 23 |
Pages | 4931-4946 |
DOI | https://doi.org/10.1111/mec.14903 |
Keywords | DNA barcoding; Ecosystem services; Food security; Food webs; Global warming; Natural pest control |
Public URL | https://hull-repository.worktribe.com/output/1134704 |
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Copyright Statement
©2018 The authors. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder
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