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More pests but less treatments: ambivalent effect of landscape complexity on Conservation Biological Control

Patrizia Zamberletti, Khadija Sabir, Thomas Opitz, Olivier Bonnefon, Edith Gabriel, Julien Papaïx
doi: https://doi.org/10.1101/2021.03.19.436155
Patrizia Zamberletti
1INRAE-BioSP, 228 route de l’aérodrome, Domaine St Paul, Site Agroparc, CS 40509, 84914 Avignon, cedex 9
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  • For correspondence: patrizia.zamberletti@inrae.fr
Khadija Sabir
2Institute of Horticultural Production Systems, Leibniz University Hannover, Hannover Germany
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Thomas Opitz
1INRAE-BioSP, 228 route de l’aérodrome, Domaine St Paul, Site Agroparc, CS 40509, 84914 Avignon, cedex 9
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Olivier Bonnefon
1INRAE-BioSP, 228 route de l’aérodrome, Domaine St Paul, Site Agroparc, CS 40509, 84914 Avignon, cedex 9
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Edith Gabriel
1INRAE-BioSP, 228 route de l’aérodrome, Domaine St Paul, Site Agroparc, CS 40509, 84914 Avignon, cedex 9
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Julien Papaïx
1INRAE-BioSP, 228 route de l’aérodrome, Domaine St Paul, Site Agroparc, CS 40509, 84914 Avignon, cedex 9
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Abstract

In agricultural landscapes, the amount and organization of crops and semi-natural habitats (SNH) have the potential to promote a bundle of ecosystem services due to their influence on ecological community at multiple spatio-temporal scales. SNH are relatively undisturbed and are often source of complementary resources and refuges, supporting more diverse and abundant natural pest enemies. However, the nexus of SNH proportion and organization with pest suppression is not trivial. It is thus crucial to understand how the behavior of pest and auxiliary species, the underlying landscape structure, and their interaction may influence conservation biological control (CBC). Here, we develop a generative stochastic landscape model to simulate realistic agricultural landscape compositions and configurations of fields and linear elements. Generated landscapes are used as spatial support over which we simulate a spatially explicit predator-prey dynamic model. We find that SNH boost predator population, but predator movement from hedges to fields is fundamental for an efficient pest regulation by auxiliaries and to decrease pesticide treatments. Moreover landscape elements may lead to different effects on pest reduction depending on the considered scale. Integration of species behaviors and traits with landscape structure at multiple scales are needed to provide useful insights for CBC.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted March 20, 2021.
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More pests but less treatments: ambivalent effect of landscape complexity on Conservation Biological Control
Patrizia Zamberletti, Khadija Sabir, Thomas Opitz, Olivier Bonnefon, Edith Gabriel, Julien Papaïx
bioRxiv 2021.03.19.436155; doi: https://doi.org/10.1101/2021.03.19.436155
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More pests but less treatments: ambivalent effect of landscape complexity on Conservation Biological Control
Patrizia Zamberletti, Khadija Sabir, Thomas Opitz, Olivier Bonnefon, Edith Gabriel, Julien Papaïx
bioRxiv 2021.03.19.436155; doi: https://doi.org/10.1101/2021.03.19.436155

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