Mamíferos de médio e grande porte em pequenos remanecentes florestais da mata atlântica com influências antropogênicas no norte do Paraná

Bruna Karla Rossaneis
2014 Semina : Ciências Biológicas e da Saúde  
Os objetivos deste trabalho foram: conhecer a comunidade de mamíferos de médio e grande porte em quatro pequenos remanescentes (fragmentos) florestais; colher dados sobre a riqueza, diversidade, equabilidade, dominância e similaridade dos animais nos ambientes estudados; verificar possibilidades de manutenção dessas populações existentes; analisar os diferentes tipos de armadilhas usados na coleta. Foram realizadas oito coletas mensais, duas em cada fragmento, entre os meses de Julho de 2008 a
more » ... de Julho de 2008 a Junho de 2009, e utilizadas três metodologias para identificação: pegadas em parcelas de areia, busca direta por vestígios e avistamentos em transecção linear. Foram registradas 14 espécies, no total. A baixa diversidade é refletida na dominância de espécies como Cebus nigritus, Procyon cancrivorus, Cerdocyons thous e Cuniculus paca e também pela abundância pouco uniforme observada nos valores Abstract The objectives of this study were to know the community of medium and large-sized mammals in four small forest remnants; collect data on the richness, diversity, equability, dominance and similarity of the animals in the environments studied; verify possibilities of maintenance of these existing populations; analyze the different types of traps used in the collection. Eight monthly collections were carried out, two in each fragment, between the months of July 2008 to June 2009, and three methodologies were used for identification: tracks in sand plots, direct search for remains and sightings in linear transect. Fourteen species were recorded in total. Low diversity is reflected in the dominance of species such as Cebus nigritus, Procyon cancrivorous, Cerdocyons thous and Cuniculus paca and also by the uneven abundance observed in the values of equability, where the least uniformity was found in area A (0.73) which coincides with the most dominance (0.29). It is possible to infer that a biotic homogenization of mammals is occurring, where richness declines and fewer opportunistic species resist in altered environments. The medium and large-sized mammals that are more specialist in habitat, diet or higher trophic level are sensitive to fragmentation, and replaced by generalist species, better adapted to human disturbance. As for the methodologies, the sand plots had the highest number of records (65%) and species (71%), being the most efficient one. Therefore, although small and not the ideal environment for some species, the forest remnants studied are additional areas for conservation of some opportunistic species, becoming important due to the continued loss of natural habitats and the small size of most conservation units found in Brazil.
doi:10.5433/1679-0367.2014v35n1p15 fatcat:m2tcnochxnb33o5tmy7rjzepci