A conservação da diversidade de anuros no cerrado brasileiro
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Data
2014-07-28
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Universidade Federal de Goiás
Resumo
Land use activities have been frequently transforming broad native areas into pastures or
plantations. This process turned out to be a global problem and is known as one major
responsible for declinesin various taxonomical groups. Frogs are one of the most threated
groups among vertebrates, from which species with aquatic larvae are more susceptible.
Such populations follow metacommunity dynamics and can be structured in function of
combined processes, such as patch dynamics, species ordination dynamics, mass effect
and neutral dynamics. Nevertheless, the lack of knowledge with respect to anuran species
occupation and richness patterns in local and regional scale poses as a threat to their
conservation. The aim of my work is to provide relevant information to the conservation of
anurans in the Brazilian Cerrado. I investigated regional and local scale patterns and
identified factors related to richness and occupation of anuran species that breed in Cerrado
ponds. For that, I have collected data in the state of Goiás, which is the only Brazilian state
totally inserted in the Cerrado biome and that follows that same tendency of habitat loss as
the whole biome (due to agriculture expansion). In Chapter I present the first official list for
the whole state of Goiás, with the objective to cover inventory gaps. In Chapter II, I explore
local and landscape factors that determine local and regional diversities of anurans. I also
assess the effects of area, heterogeneity, productivity and local and landscape habitat
complexity over alpha and beta diversities of anurans. In Chapter III, I approach one of the
most classic and controversial models for the conservation of the species, known as
"SLOSS" (single large or several small). This model should be considered especially when
the goal is to preserve as many frog species associated with ponds.Finally, in Chapter IV, I
built occupation models to assess the effects of amount of remaining habitats, isolation
between remnants as well as local characteristics on the occurrence of some species of
amphibians typical Brazilian Cerrado.
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LIMA, Luciana Signorelli Faria. A conservação da diversidade de anuros no cerrado brasileiro. 2014. 41 f. Tese (Doutorado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2012.