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Species richness, species range size and ecological specialisation among African primates: geographical patterns and conservation implications

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Abstract

The geographical distribution of species richness and species range size of African anthropoid primates (catarrhines) is investigated and related to patterns of habitat and dietary niche breadth. Catarrhine species richness is concentrated in the equatorial regions of central and west Africa; areas that are also characterised by low average species range sizes and increased ecological specificity. Species richness declines with increasing latitude north and south of the equator, while average species range size, habitat and dietary breadth increase. Relationships between species richness, species range size and niche breadth remain once latitudinal and longitudinal effects have been removed. Among areas of lowest species richness, however, there is increased variation in terms of average species range size and niche breadth, and two trends are identified. While most such areas are occupied by a few wide-ranging generalists, others are occupied by range-restricted specialist species. That conservation efforts increasingly focus on regions of high species richness may be appropriate if these regions are also characterised by species that are more restricted in both their range size and their ecological versatility, although special consideration may be required for some areas of low species richness.

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Authors and Affiliations

  1. Department of Zoology and Entomology, University of Natal, Pietermaritzburg, Private Bag X01, Scottsville, 3209, South Africa

    Harriet A.C. Eeley

  2. Department of Biological Anthropology, University of Cambridge, Downing Street, Cambridge, CB3 3DZ, UK

    Robert A. Foley

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  1. Harriet A.C. Eeley
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  2. Robert A. Foley
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Eeley, H.A., Foley, R.A. Species richness, species range size and ecological specialisation among African primates: geographical patterns and conservation implications. Biodiversity and Conservation 8, 1033–1056 (1999). https://doi.org/10.1023/A:1008831320469

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