Klapwijk, Maartje
- Department of Ecology, Swedish University of Agricultural Sciences
Abstract
Conservation biological control depends on the presence of regulatory factors in the natural environment to prevent large fluctuations in herbivore density, and the related feeding activity. Mixed forests, in contrast to monocultures, are thought to support stronger top-down control. In this chapter, we explore the relative impact of bottom-up (resource driven) versus top-down (predation driven) control in diverse and pure forest stands and the potential population dynamical consequences arising in this tri-trophic system. When considering a specialist herbivore and a specialist predator, we find that reducing tree diversity, thus increasing host tree density, leads to a shift from pure bottom-up control to involving top-down effects. We also find that the effect of top-down control depends on the relative efficiency of herbivore and predator in converting their respective resources to offspring, potentially leading to either persistence of both the predator and herbivore or herbivore extinction. We conclude that the effects of diversification, through reduced host tree density, on the dynamics of a tri-trophic system will strongly depend on traits of the herbivore and the predator(s) relative to each other.
Published in
Title: Biological Control of Insect Pests in Plantation Forests
Publisher: Springer Nature
SLU Authors
Laroche, Fabien
- Department of Ecology, Swedish University of Agricultural Sciences
- National Research Institute for Agriculture, Food and Environment (INRAE)
- Department of Ecology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Ecology
Publication identifier
- DOI: https://doi.org/10.1007/978-3-031-76495-0_6
- ISBN: 9783031764943
- eISBN: 9783031764950
Permanent link to this page (URI)
https://res.slu.se/id/publ/142902