Skip to Main content Skip to Navigation
Journal articles

Multi‐scale mosaics in top‐down pest control by ants from natural coffee forests to plantations

Abstract : While top-down control plays an important role in shaping both natural and agricultural food webs, we lack insights into how top-down control effects vary across spatial scales. We used a multi-scale survey of top-down control of coffee pests and diseases by arboreal ants to examine if colony location creates a small-scale mosaic in top-down control around trees and if the strength of that control varies between sites at the landscape scale. We investigated pest and disease levels on coffee shrubs at different distances from shade trees with and without a Crematogaster spp. ant colony in 59 sites along a coffee management intensity gradient in southwestern Ethiopia. Within sites, ants significantly suppressed herbivory and coffee leaf rust at distances less than 10 m from nesting trees. Top-down control varied between sites, with stronger top-down control of free-feeding herbivory near ant colonies at sites with lower management intensity and stronger top-down control of a skeletonizer at sites with higher canopy cover. We conclude that the strength of top-down control by ants is highly heterogeneous across spatial scales, as a consequence of the biology of the predator at the small scale and herbivore density or changes in herbivore-ant interactions at the landscape scale.
Document type :
Journal articles
Complete list of metadata

https://hal-isara.archives-ouvertes.fr/hal-03713328
Contributor : Oriane Debiez Connect in order to contact the contributor
Submitted on : Monday, July 4, 2022 - 3:37:37 PM
Last modification on : Tuesday, July 5, 2022 - 3:53:39 AM

File

Ecology2021.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Moritz Stüber, Ayco J M Tack, Beyene Zewdie, Esayas Mendesil, Tamiru Shimales, et al.. Multi‐scale mosaics in top‐down pest control by ants from natural coffee forests to plantations. Ecology, Ecological Society of America, 2021, 102 (7), pp.e03376. ⟨10.1002/ecy.3376⟩. ⟨hal-03713328⟩

Share

Metrics

Record views

1081

Files downloads

5932