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Multiple Impacts of Leaf‐Cutting Ants and Their Novel Ecological Role in Human‐Modified Neotropical Forests
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Multiple Impacts of Leaf‐Cutting Ants and Their Novel Ecological Role in Human‐Modified Neotropical Forests
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Journal Article
Multiple Impacts of Leaf‐Cutting Ants and Their Novel Ecological Role in Human‐Modified Neotropical Forests
2014
Overview
Herbivory has been identified as a potent evolutionary force, but its ecological impacts have been frequently underestimated. Leaf‐cutting ants represent one of the most important herbivores of the Neotropics and offer an interesting opportunity to address the role played by herbivorous insects through a perspective that embraces population‐ to ecosystem‐level effects. Here we: (1) qualitatively summarize the multiple ways leaf‐cutting ants interact with food plants and their habitats and elucidate the ultimate outcome of such interactions at multiple organization levels; (2) update our understanding of leaf‐cutting ant‐promoted disturbance regimes; and (3) examine potential ecological roles by leaf‐cutting ants within the context of human‐modified landscapes to guide future research agendas. First, we find that leaf‐cutting ants show that some herbivorous insects are able to generate ecologically important disturbance regimes via non‐trophic activities. Second, impacts of leaf‐cutting ants can be observed at multiple spatio‐temporal scales and levels of biological organization. Third, ecosystem‐level effects from leaf‐cutting ants are ecosystem engineering capable not only of altering the abundance of other organisms, but also the successional trajectory of vegetation. Finally, effects of leaf‐cutting ants are context‐dependent, species‐specific, and synergistically modulated by anthropogenic interferences. Future research should examine how leaf‐cutting ants respond to deforestation and influence remaining vegetation in human‐modified landscapes. By promoting either heterogeneity or homogeneity, leaf‐cutting ants operate not only as agricultural pests but also as ecological key players.
