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Diversidade de Scarabaeinae (ColeÃptera: Scarabaeidae) na Caatinga do Parque Nacional do Catimbau, BuÃque - PE
Carolina Nunes Liberal
DATA DE PUBLICAÇÃO
This study aimed to ascertain the Scarabaeinae fauna from Parque Nacional do Catimbau, BuÃque - PE, and assess the response of their communities, in open and closed environments, to the variation pluviometric. The Scarabaeinae (Coleoptera: Scarabaeidae) are considered useful as biological indicators and have been used to investigate the effects of disturbances in various environments. Used, for the most part feces as food for larvae and adults and substrate for oviposition. The Caatinga occupies, basically, the Northeast region from Brazil. It shows decidual vegetation, tree or shrub, and hot semi-arid climate. It is relatively rich in species, but considered the Brazilian natural region least protected. We selected three areas of open environment and three more areas with dense vegetation. The monthly collections were in the period May 2006 to April 2007 (except February 2007), using 36 pitfall traps, baited with human feces, exposed for 48 h. They were taken in abundance, richness, diversity and evenness of the communities of Scarabaeinae, using ANOVA two-way test for comparison between these measures and environments stations. We used the estimators Chao 1, Chao 2, Jacknife 1 and Jacknife 2. It was used the Spearman correlation coefficient to establish relations between the abundance and richness of Scarabaeinae with rainfall. It was used the Jaccard index of similarity between the environments and between the months. 1097 individuals were collected from 13 species, six genera and four tribes. The most abundant species were Dichotomius geminatus, Ateuchus aff. carbonarius, Dichotomius aff. laevicollis and Dichotomius semisquamosus. Dichotomius aff. laevicollis was only found in a closed environment. There was no significant difference in relation to the environment, in abundance, diversity and evenness of Scarabaeinae. But there was a difference in richness between the environments. Significant difference was found in abundance, richness and diversity between seasons. The values of richness estimated ranged from 18.45 to 31 and the curves not reached the asymptotes. With the start of the rainy season there was an increase in richness and abundance of Scarabaeinae. The values of correlation were high and significant. According to the results it can be inferred that in restrictive environments, such as Caatinga, the seasonal variation strongly influences the communities of Scarabaeinae