Assembleia de besouros escarabeíneos em um gradiente ambiental de floresta atlântica no Sul de Santa Catarina

• Autor(a) principal: Da Silva, Bryan Goulart
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/17003
• topic: Heterogeneidade de habitat Fragmentação Rola-Bost

The Atlantic Forest is one of the richest but most threatened biomes, especially due to habitat fragmentation and modification that affects their heterogeneity and, consequently, species richness and abundance. Scarab beetles (Coleoptera: Scarabaeinae) constitute a group considered bioindicator for having species susceptible to environmental changes. The present study evaluated how changes in habitat heterogeneity alter the composition and structure of assemblages of scarab beetles along an environmental gradient in southern Santa Catarina, Brazil. The study was conducted in six sample sites, were habitat structure was evaluated in order to define the disturbance levels of each site, creating an environmental gradient, being categorized as: preserved, intermediate and disturbed levels. For the collections, 18 baited fall traps (human feces and fish carcass) were used, arranged intercalated each sampling site. Three collections per site were performed between October 2018 and March 2019. Were collected total of 4,219 individuals distributed in eight genera and 22 species. Dichotomius sericeus (Harold, 1867) was the most abundant species at all levels of environmental disturbance. The results showed a 27.3% reduction in the richness of the scarab assemblages in the disturbed environment when compared to the preserved one. The presence of Dichotomius assifer (Eschscholtz, 1822) and Canthidium aff. trinodosum Boheman, 1858, were associated with preserved environments. The preserved and disturbed level environments were the ones that presented the biggest difference in the composition of the assembly. The intermediate level presented similarity in its composition with the other disturbance levels. With this study it was possible to describe the composition of the scarab beetle assemblage along a gradient of environmental disturbance, in the south of Santa Catarina, Brazil.