Áreas de intensa agropecuária podem apresentar comunidades de anuros representativas?
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Data
2011-08-29
Autores
Ramos, Jade
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Universidade Federal de Goiás
Resumo
The attributes that make amphibians good environmental indicators are
permeable skin, shell-less eggs and life cycle with two phases in most of the species,
one terrestrial (adult) and other aquatic (tadpoles). Moreover, they are important
components of many ecological communities, either by eating a multitude of insects or
serving as prey for other animals. Currently many species have suffered population
declines or have become extinct. The hypotheses tested were: (a) water bodies in the
southwest region of Goiás do not show species richness similar to other regions of the
Cerrado biome; (b) the structural integrity (measured by environmental integrity index)
of the water body interferes with richness and abundance of the anuran species found;
(c) water bodies located in preserved areas show higher species richness, abundance of
individuals and β diversity than anthropized water bodies (located in pasture, soy and
sugar-cane fields). Field observations were conducted between 2009 and 2010 in six
municipalities in southwest Goiás: Aporé, Jataí, Mineiros, Portelândia, Rio Verde and
Serranópolis. Forty-three water bodies were sampled, being ten of them found in sugar
cane crops, twelve in pasture, twelve in soybean crops and nine in areas of natural
vegetation. We recorded 34 species of frogs. Considering all water bodies sampled in
southwest Goiás, both collector’s curves made with the occurrences of tadpoles and
adults tended to stabilize. The richness estimated for adults was 39.89 ± 5.06 and 35.82
± 7.62 for tadpoles. The most abundant species in adult stage were Dendropsophus
cruzi, D. minutus and Hypsiboas albopunctatus, respectively, while in larval stage the
most abundant were Hypsiboas albopunctatus, Physalaemus cuvieri and Scinax
fuscovarius. Overall, for both adults and tadpoles, we found no correlations between
richness and abundance of species and environmental integrity index for any of the four
types of water bodies. The only exception was when species abundance (adult phase)
was related to the environmental integrity index of all water bodies. The species
composition (adult and larval stage) did not differ among the types of water bodies. All
hypotheses tested were rejected. Although the southwest Goiás is impacted by
agriculture, the anuran species richness is similar to other areas of Cerrado.
Descrição
Palavras-chave
Anurofauna, Riqueza de espécies, Agropecuária, Cerrado, Anurofauna, Species richness, Agriculture, Cerrado
Citação
RAMOS, J. Áreas de intensa agropecuária podem apresentar comunidades de anuros representativas? 2011. 68 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2011.