Spatial and temporal analysis of α, β and γ diversities of bats in a fragmented landscape

  • Moreno C
  • Halffter G
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We test a strategy for analyzing species richness in a landscape. This strategy is based on the joint analysis of (local), (turnover) and (landscape) diversities. We assessed the spatial and temporal relations among , and diversity of bats (Phyllostomidae and Mormoopidae) in a tropical landscape. In a spatial dimension, diversity depends on the diversity of the most species-rich community. The value of spatial diversity between habitats was very low. A high diversity was found in a cornfield, which may be attributed to the reduced extent of the field (compared with a more extensive field) that allows the arrival of individuals from nearby rich communities. In a temporal dimension, within habitat cumulative richness over sampling period may be considerably different from the average richness. These differences are attributed to temporal turnover during short time intervals. Therefore, cumulative richness may be viewed as the temporal equivalent of within-habitat diversity, which results of both average and temporal turnover. We discuss, which value must be taken as an estimate of habitat species richness, the average or the cumulative , and the implications that this decision can have in the evaluation of biodiversity.

Author-supplied keywords

  • Biodiversity
  • Landmosaic
  • Neotropical bats
  • Temporal turnover

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  • Claudia E. Moreno

  • Gonzalo Halffter

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