Priority areas for anuran conservation using biogeographical data: a comparison of greedy, rarity, and simulated annealing algorithms to define reserve networks in cerrado
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Data
2005-05-31
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Instituto Internacional de Ecologia
Resumo
Spatial patterns in biodiversity variation at a regional scale are rarely taken into account when a
natural reserve is to be established, despite many available methods for determining them. In this
paper, we used dimensions of occurrence of 105 species of Anura (Amphibia) in the cerrado region
of central Brazil to create a regional system of potential areas that preserves all regional diversity,
using three different algorithms to establish reserve networks: “greedy”, rarity, and simulated
annealing algorithms. These generated networks based on complementarity with 10, 12, and 8 regions,
respectively, widely distributed in the biome, and encompassing various Brazilian states. Although
the purpose of these algorithms is to find a small number of regions for which all species are
represented at least once, the results showed that 67.6%, 76.2%, and 69.5% of the species were
represented in two or more regions in the three networks. Simulated annealing produced the smallest
network, but it left out three species (one endemic). On the other hand, while the greedy algorithm
produce a smaller solution, the rarity-based algorithm ensured that more species were represented
more than once, which can be advantageous because it takes into consideration the high levels of
habitat loss in the cerrado. Although usually coarse, these macro-scale approaches can provide overall
guidelines for conservation and are useful in determining the focus for more local and effective
conservation efforts, which is especially important when dealing with a taxonomic group such as
anurans, for which quick and drastic population declines have been reported throughout the world.
Descrição
Palavras-chave
Anurans, Cerrado, Complementarity, Reserve network, Reserve selection, Greedy algorithm, Rarity, richness
Citação
DINIZ FILHO, J. A. F.; BINI, L. M.; BASTOS, R. P.; VIEIRA, C. M.; VIEIRA, L. C. G. Priority areas for anuran conservation using biogeographical data: a comparison of greedy, rarity and simulated annealing algorithms to define reserve networks in cerrado. Brazilian Journal of Biology, São Carlos, v. 65, n.2, p. 251-261, May 2005.