Estrutura e composição da comunidade de tricladidos em áreas com alto grau de impacto antrópico do sul do Brasil

Abstract

Land planarians are bioindicators of the degree of anthropization and preservation of their habitats and areas of high general biodiversity. Some species which occur in Rio Grande do Sul could be used as bioindicators of preserved or altered areas, but the studies have been restricted to legally protected areas showing relatively large fragments of native forest. This paper aims at analysing the structure and composition of land planarian community in areas of secondary forests and grassland of the Universidade do Vale do Rio dos Sinos Campus - UNISINOS, in São Leopoldo, RS along an annual cycle. Four areas of secondary forest and four grassland areas were selected, where 12 samplings were carried out. For each area two 100m-long transects had their boundaries set, where ten points along each transect were randomly chosen. At each point a 4m² plot was used, with a 10-minute sampling effort. 78 specimens were recorded, which belong to nine species of two Terricola families (Geoplanidae e Rhynchodemidae). Only