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Type: Artigo de Periódico
Title: Mutualism Exploitation: Predatory Drosophilid Larvae Sugar-trap Ants And Jeopardize Facultative Ant-plant Mutualism
Author: Vidal
MC; Sendoya
SF; Oliveira
Abstract: An open question in the evolutionary ecology of ant-plant facultative mutualism is how other members of the associated community can affect the interaction to a point where reciprocal benefits are disrupted. While visiting Qualea grandiflora shrubs to collect sugary-rewards at extrafloral nectaries, tropical savanna ants deter herbivores and reduce leaf damage. Here we show that larvae of the fly Rhinoleucophenga myrmecophaga, which develop on extrafloral nectaries, lure potentially mutualistic, nectar-feeding ants and prey on them. Foraging ants spend less time on fly-infested foliage. Field experiments showed that predation (or the threat of predation) on ants by fly larvae produces cascading effects through three trophic levels, resulting in fewer protective ants on leaves, increased numbers of chewing herbivores, and greater leaf damage. These results reveal an undocumented mode of mutualism exploitation by an opportunistic predator at a plant-provided food source, jeopardizing ant-derived protection services to the plant. Our study documents a rather unusual case of predation of adult ants by a dipteran species and demonstrates a top-down trophic cascade within a generalized ant-plant mutualism.
Subject: Ants
Extrafloral Nectaries
Indirect Effects
Insect Herbivory
Multitrophic Interaction
Mutualism Disruption
Top-down Effects
Trophic Cascade
Tropical Savanna
Citation: Ecology. WILEY-BLACKWELL, n. 97, n. 7, p. 1650 - 1657.
Rights: aberto
Identifier DOI: 10.1002/ecy.1441
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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