Niche differentiation in rainforest ant communities across three continents

Michael E. Grevé, Mickal Houadria, Alan N. Andersen, Florian Menzel

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    A central prediction of niche theory is that biotic communities are structured by niche differentiation arising from competition. To date, there have been numerous studies of niche differentiation in local ant communities, but little attention has been given to the macroecology of niche differentiation, including the extent to which particular biomes show distinctive patterns of niche structure across their global ranges. We investigated patterns of niche differentiation and competition in ant communities in tropical rainforests, using different baits reflecting the natural food spectrum. We examined the extent of temporal and dietary niche differentiation and spatial segregation of ant communities at five rainforest sites in the neotropics, paleotropics, and tropical Australia. Despite high niche overlap, we found significant dietary and temporal niche differentiation in every site. However, there was no spatial segregation among foraging ants at the community level, despite strong competition for preferred food resources. Although sucrose, melezitose, and dead insects attracted most ants, some species preferentially foraged on seeds, living insects, or bird feces. Moreover, most sites harbored more diurnal than nocturnal species. Overall niche differentiation was strongest in the least diverse site, possibly due to its lower number of rare species. Both temporal and dietary differentiation thus had strong effects on the ant assemblages, but their relative importance varied markedly among sites. Our analyses show that patterns of niche differentiation in ant communities are highly idiosyncratic even within a biome, such that a mechanistic understanding of the drivers of niche structure in ant communities remains elusive.

    Original languageEnglish
    Pages (from-to)8601-8615
    Number of pages15
    JournalEcology and Evolution
    Volume9
    Issue number15
    Early online date17 Jul 2019
    DOIs
    Publication statusPublished - Aug 2019

    Fingerprint

    continents
    rainforest
    rain forests
    ant
    niche
    Formicidae
    niches
    insects
    food
    biome
    feces
    continent
    birds
    macroecology
    insect
    sucrose
    melezitose
    niche overlap
    biocenosis
    bait

    Cite this

    Grevé, M. E., Houadria, M., Andersen, A. N., & Menzel, F. (2019). Niche differentiation in rainforest ant communities across three continents. Ecology and Evolution, 9(15), 8601-8615. https://doi.org/10.1002/ece3.5394
    Grevé, Michael E. ; Houadria, Mickal ; Andersen, Alan N. ; Menzel, Florian. / Niche differentiation in rainforest ant communities across three continents. In: Ecology and Evolution. 2019 ; Vol. 9, No. 15. pp. 8601-8615.
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    abstract = "A central prediction of niche theory is that biotic communities are structured by niche differentiation arising from competition. To date, there have been numerous studies of niche differentiation in local ant communities, but little attention has been given to the macroecology of niche differentiation, including the extent to which particular biomes show distinctive patterns of niche structure across their global ranges. We investigated patterns of niche differentiation and competition in ant communities in tropical rainforests, using different baits reflecting the natural food spectrum. We examined the extent of temporal and dietary niche differentiation and spatial segregation of ant communities at five rainforest sites in the neotropics, paleotropics, and tropical Australia. Despite high niche overlap, we found significant dietary and temporal niche differentiation in every site. However, there was no spatial segregation among foraging ants at the community level, despite strong competition for preferred food resources. Although sucrose, melezitose, and dead insects attracted most ants, some species preferentially foraged on seeds, living insects, or bird feces. Moreover, most sites harbored more diurnal than nocturnal species. Overall niche differentiation was strongest in the least diverse site, possibly due to its lower number of rare species. Both temporal and dietary differentiation thus had strong effects on the ant assemblages, but their relative importance varied markedly among sites. Our analyses show that patterns of niche differentiation in ant communities are highly idiosyncratic even within a biome, such that a mechanistic understanding of the drivers of niche structure in ant communities remains elusive.",
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    Grevé, ME, Houadria, M, Andersen, AN & Menzel, F 2019, 'Niche differentiation in rainforest ant communities across three continents', Ecology and Evolution, vol. 9, no. 15, pp. 8601-8615. https://doi.org/10.1002/ece3.5394

    Niche differentiation in rainforest ant communities across three continents. / Grevé, Michael E.; Houadria, Mickal; Andersen, Alan N.; Menzel, Florian.

    In: Ecology and Evolution, Vol. 9, No. 15, 08.2019, p. 8601-8615.

    Research output: Contribution to journalArticleResearchpeer-review

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