Modelos de nicho ecológico, registros fósseis e o pressuposto de equilíbrio das distribuições das espécies com o clima
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2014-04-23
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Universidade Federal de Goiás
Resumo
Understand how species are spatially distributed has been exhaustively discussed in ecology
over the last decades. Recently, frameworks based on Ecological Niche Models (ENM) have
emerged to avoid problems related to the lack of species geographical information, once it
identify which environmental suitable conditions of geographic space enable the persistence
of species. Recently this approach has become a significant component in Systematic
Conservation Planning, helping managers to select better areas to create reserves. Several
factors limit the fundamental niche of species and poor geographical information about
species distribution may lead to be an underestimation of suitable conditions that one specie
occur,, revealing an non-equilibrium with climate. Thus, using good fossil records to
construct ecological niche models can be a better way to evaluate and improve ENM
predictions and it allows us to estimate other suitable conditions not seen before. Thereby, our
aim was to investigate if ENMs built for Mauritia flexuosa, and Tapirus terrestris improve
with the addition of fossil information. So, different ENMs were built using, first, current
records and, second, using different proportions of fossil data. The results showed that species
closer to equilibrium with climate (M. flexuosa) had an improvement in model’s performance
with the addition of fossil records, while species with higher non-equilibrium (T. terrestris)
decreased the model’s performance.
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GUIMARÃES, T. M. O. Modelos de nicho ecológico, registros fósseis e o pressuposto de equilíbrio das distribuições das espécies com o clima. 2014. 33 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2014.