Effects of predatory ants on lower trophic levels across a gradient of coffee management complexity
dc.contributor.author | Philpott, Stacy M. | en_US |
dc.contributor.author | Perfecto, Ivette | en_US |
dc.contributor.author | Vandermeer, John H. | en_US |
dc.date.accessioned | 2010-06-01T18:16:03Z | |
dc.date.available | 2010-06-01T18:16:03Z | |
dc.date.issued | 2008-05 | en_US |
dc.identifier.citation | Philpott, S. M.; Perfecto, I.; Vandermeer, J. (2008). "Effects of predatory ants on lower trophic levels across a gradient of coffee management complexity." Journal of Animal Ecology 77(3): 505-511. <http://hdl.handle.net/2027.42/71478> | en_US |
dc.identifier.issn | 0021-8790 | en_US |
dc.identifier.issn | 1365-2656 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/71478 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=18248385&dopt=citation | en_US |
dc.description.abstract | 1. Ants are important predators in agricultural systems, and have complex and often strong effects on lower trophic levels. Agricultural intensification reduces habitat complexity, food web diversity and structure, and affects predator communities. Theory predicts that strong top-down cascades are less likely to occur as habitat and food web complexity decrease. 2. To examine relationships between habitat complexity and predator effects, we excluded ants from coffee plants in coffee agroecosystems varying in vegetation complexity. Specifically, we studied the effects of eliminating ants on arthropod assemblages, herbivory, damage by the coffee berry borer and coffee yields in four sites differing in management intensification. We also sampled ant assemblages in each management type to see whether changes in ant assemblages relate to any observed changes in top-down effects. 3. Removing ants did not change total arthropod densities, herbivory, coffee berry borer damage or coffee yields. Ants did affect densities of some arthropod orders, but did not affect densities of different feeding groups. The effects of ants on lower trophic levels did not change with coffee management intensity. 4. Diversity and activity of ants on experimental plants did not change with coffee intensification, but the ant species composition differed. 5. Although variation in habitat complexity may affect trophic cascades, manipulating predatory ants across a range of coffee agroecosystems varying in management intensity did not result in differing effects on arthropod assemblages, herbivory, coffee berry borer attack or coffee yields. Thus, there is no clear pattern that top-down effects of ants in coffee agroecosystems intensify or dampen with decreased habitat complexity. | en_US |
dc.format.extent | 131612 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2008 British Ecological Society | en_US |
dc.subject.other | Chiapas Mexico | en_US |
dc.subject.other | Coffee Agroecosystems | en_US |
dc.subject.other | Dominant Arboreal Ants | en_US |
dc.subject.other | Food Web Structure | en_US |
dc.subject.other | Intraguild Predation | en_US |
dc.title | Effects of predatory ants on lower trophic levels across a gradient of coffee management complexity | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Ecology and Evolutionary Biology, University of Michigan, 830 N. University Ave, Ann Arbor, MI 48109, USA; and | en_US |
dc.contributor.affiliationum | School of Natural Resources and the Environment, University of Michigan, 430 E. University, Ann Arbor, MI 48109, USA | en_US |
dc.identifier.pmid | 18248385 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/71478/1/j.1365-2656.2008.01358.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2656.2008.01358.x | en_US |
dc.identifier.source | Journal of Animal Ecology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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