A herpetofauna no cerrado: composição de espécies, sazonalidade e similaridade
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2019-09-28
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Universidade Federal de Goiás
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Chapter 1
The aim of this work was: 1 - to verify the possible differences in the composition of the herpetofauna and anurofauna in two sites with different phytophysiognomys, riparian forest and cerrado stricto sensu (a kind of Brazilian savanna); 2 - to analyze the temporal and spatial distributions of reptiles and amphibians inhabitants of these habitats.
Field work was carried out between September 1997 and September 1998, at the "Estação Florestal de Experimentação-EFLEX", Silvânia County, Goiás State. The assemblage sampled through the technique of "pitfall traps and drift fences", is composed by nine species of amphibians and fourteen species of reptiles. The forest environment is more abundant and richness in amphibian's species and have more diversity of reptiles (H'). The " savannah " is more abundant and richness in species of reptiles and more diversity for anurofauna. The Morisita index used for determination of the similarity among the habitats shows that there is a great similarity among the habitats when the anurofauna is analyzed. When the reptiles were analyzed the Morisita index points out that there was no great similarity among the two habitats. The temporal distribution of the amphibians was concentrated on the wet period, while the temporal distribution of the reptiles was shown more flexible along the year. The influence of regional factors seems to be larger than the influence of local factors .There were positive correlations: among medium temperature and occurrence of amphibians in the two habitats; between the medium temperature and the
diversity index H' verified for amphibians in the savannah; and among the
medium temperature and the occurrence of reptiles in the savannah. No significant correlations were detected among the number of individuals and the rainfall, and among the diversity index (H') and the rainfall.
Chapter 2
In relation to the aphibiofauna of the Cerrado, only very recently some studies were conducted. At the same time, the Cerrado has been being an objective of great occupation rates, wich reinforces the need of new studies. The present work has the goal to sumarize the relative data of species abbundance for 27 Brazilian localities and to compare the aphibiofauna of the Cerrado with other morfoclimatics domains (Amazônia, Caatinga and Atlantic forest). For the faunistic comparison, Coefficient of Biogeographic Resemblance (CBR) was used, grouping species in common and groups of species in common among the 27 plots. The grouping method applied was the medium distance, UPGMA. It was observed that as the localities are farther apart from each other, the anfibiofaunas tend to be more heterogeneous. In a general way, the diversity of species in the Cerrado localities is smaller when compared with others of Amazônia and of the Atlantic forest. Though, the diversity of the Cerrado is bigger when compared the other non forest environments (lhano and chaco). The anfibiofauna found in the Cerrado is more similar to that of Caatinga than to those of the other morfoclimatics domains. (Atlantic forest and Amazônia).
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MOTTA, J. A. O. A herpetofauna no cerrado: composição de espécies, sazonalidade e similaridade. 2019. 112 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Goiás, Goiânia, 1999.