Nós precisamos de mais espécies de tetrápodas?
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Data
2014-03-28
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Universidade Federal de Goiás
Resumo
We have been describing species for a long time and we have been asking about
how many of them are left on the Earth. Species are evolutionary lineages and the answer
to that question maybe is not in richness estimates, but in how much of the evolutionary
tree was already described. Here, we studied how richness and phylogenetic diversity
have been accumulated in Tetrapods and how those metrics differ from each other. We
also tested if there were biases for particular clades in species describing process, it would
mean non-random description along the phylogeny. We found Amphibia and Squamata
have ascendant curves for both metrics, Mammals are beginning its stabilization and
Birds are stabilizing for about 60 years. Nonetheless, phylogenetic diversity trends to
stabilize firstly than richness, due to the convex relationship between them. We also
founde that description has been at random about clades. Thus, more efforts are necessary
to improve our phylogenetic resolution of Amphibia, Squamata and Mammals. Once we
have an ample sample size in Birds and a random sample along phylogeny, we need to
resolve Darwinian and Wallacean shortfalls, taking into consideration the phylogenetic
relationship among species, the evolutionary model of their traits and where those species
occur. Understanding species as lineages permits us to stabilize early the number of
species and to infer which species could have been extinct before description, such as
what would be their impacts in conservation, community ecology and ecosystem
function.
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JARDIM, L. L. C. Z. Nós precisamos de mais espécies de tetrápodas? 2014. 27 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2014.