Does inundation risk affect leaf-cutting ant distribution? A study along a topographic gradient of a Costa Rican tropical wet forest

Does inundation risk affect leaf-cutting ant distribution? A study along a topographic gradient of a Costa Rican tropical wet forest

Successional state of forest and availability of pioneer plants are recognized factors affecting densities of leaf-cutting ants. However little is known about how abiotic factors can shape nest distributions. We investigated the effect of topography, soil, forest successional state and inundation ri...

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Veröffentlicht in:Journal of Tropical Ecology. - Cambridge University Press, 1985. - 30(2014), 1, Seite 89-92
1. Verfasser: Sendoya, Sebastian F. (VerfasserIn)
Weitere Verfasser: Silva, Paulo S. D., Farji-Brener, Alejandro G.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Journal of Tropical Ecology
Schlagworte:Behavioral sciences Biological sciences Physical sciences Applied sciences
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520 |a Successional state of forest and availability of pioneer plants are recognized factors affecting densities of leaf-cutting ants. However little is known about how abiotic factors can shape nest distributions. We investigated the effect of topography, soil, forest successional state and inundation risk on nest density and size of Atta cephalotes colonies along streams in a tropical wet forest in Costa Rica. In each forest type, we surveyed 12 sites, each site comprising five transects (10 × 100 m) varying in topography and proximity to streambeds. We found no difference regarding nest size or density between forest types or soil consociation. Nest density varied with topographic environment, with significantly higher nest density on slope tops (farther from streambeds) and without colonies in valley bottoms (closer to streambeds). Nests found in areas affected by the last great inundation before our study were scarcer and smaller than nests in non-flooded areas. We showed that inundation events favour an accumulation of Atta colonies towards higher sites, where they are also allowed to become larger and may survive longer. Inundation risk may be a strong force shaping the distribution of leaf-cutting ant nests in tropical floodplain forests, even concealing the relevance of successional state of forest. 
540 |a © Cambridge University Press 2014 
650 4 |a Behavioral sciences  |x Ethology  |x Animal behavior  |x Habitat selection  |x Animal nesting 
650 4 |a Biological sciences  |x Agriculture  |x Agricultural sciences  |x Agronomy  |x Soil science  |x Soils  |x Forest soils 
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650 4 |a Physical sciences  |x Earth sciences  |x Hydrology  |x Floods 
650 4 |a Biological sciences  |x Biology  |x Zoology  |x Entomology  |x Insect biology  |x Insect nests 
650 4 |a Biological sciences  |x Ecology  |x Population ecology  |x Synecology  |x Biocenosis  |x Plant communities  |x Forests  |x Old growth forests 
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650 4 |a Biological sciences  |x Biology  |x Zoology  |x Animals  |x Invertebrates  |x Arthropods  |x Insects  |x Ants  |x Leaf cutting ants 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant ecology  |x Forest ecology 
650 4 |a Applied sciences  |x Engineering  |x Civil engineering  |x Geotechnical engineering  |x Soil properties  |x Soil physical properties  |x Soil density  |x SHORT COMMUNICATION 
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700 1 |a Silva, Paulo S. D.  |e verfasserin  |4 aut 
700 1 |a Farji-Brener, Alejandro G.  |e verfasserin  |4 aut 
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