Resumo
The environmental transformations constitute the principal cause of changes in biodiversity decrease. This make the comparative studies between natural and altered environments very important. This work compare the fauna of Scarabaeidae at the following areas: isolated forest fragment and pasture at the secondary stage of succession. Scarabs beetles were collected using four pitfall traps baited with cattle meat in each habitat, fortnightly from November 1998 to April 1999. It was collected a total of 3,113 individuals from 32 species in forest and 956 individuals from 27 species in pasture. The Sorensen index was used to calculate similarity, and Shannon index to calculate diversity. The qualitative similarity found was 0.64 and the quantitative similarity was 0.10. A relevant difference was found in the diversity of two localities, the value found in pasture was 1.75 and in forest was 2.44; these values were significantly different by T test (p<0.001). Our results suggest that the changes in forest area for pasture area caused losses concerning biodiversity of Scarabaeidae and the respective functions of these organisms in the ecosystem.
Coleoptera; Scarabaeidae; scavengers; pitfall traps; forest fragment; pasture; decomposition
Coleoptera; Scarabaeidae; scavengers; pitfall traps; forest fragment; pasture; decomposition
Scarabaeidae (Coleoptera) do Parque Estadual Mata dos Godoy e de área de pastagem, no norte do Paraná, Brasil
Scarabaeidae (Coleoptera) from Mata dos Godoy State Park and pasture, at north of Paraná, Brazil
Ísis Meri MedriI; José LopesII
ICurso de Graduação em Ciências Biológicas, Laboratório de Entomologia, Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina. Caixa Postal 6001, Campus Universitário, 86051-990 Londrina, Paraná, Brasil
IIDepartamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina. Caixa Postal 6001, Campus Universitário, 86051-990 Londrina, Paraná, Brasil. E-mail: jea@uel.br
ABSTRACT
The environmental transformations constitute the principal cause of changes in biodiversity decrease. This make the comparative studies between natural and altered environments very important. This work compare the fauna of Scarabaeidae at the following areas: isolated forest fragment and pasture at the secondary stage of succession. Scarabs beetles were collected using four pitfall traps baited with cattle meat in each habitat, fortnightly from November 1998 to April 1999. It was collected a total of 3,113 individuals from 32 species in forest and 956 individuals from 27 species in pasture. The Sorensen index was used to calculate similarity, and Shannon index to calculate diversity. The qualitative similarity found was 0.64 and the quantitative similarity was 0.10. A relevant difference was found in the diversity of two localities, the value found in pasture was 1.75 and in forest was 2.44; these values were significantly different by T test (p<0.001). Our results suggest that the changes in forest area for pasture area caused losses concerning biodiversity of Scarabaeidae and the respective functions of these organisms in the ecosystem.
Key words: Coleoptera, Scarabaeidae, scavengers, pitfall traps, forest fragment, pasture, decomposition
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AGRADECIMENTOS. A Fernando Z. Vaz-de-Mello pela identificação da amostra das espécies de Scarabaeidae coletados; a José Marcelo Torezan pelo auxílio nos cálculos dos índices ecológicos e valiosas sugestões; a Waldir Medri, José Carlos Dalmas e José da Costa Soeiro pelos cálculos estatísticos; a Cláudio Müller pela revisão do artigo; e ao CNPq pela concessão de Bolsa de Iniciação Científica.
Recebido em 11.V.2000; aceito em 20.VI.2001.
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Datas de Publicação
-
Publicação nesta coleção
30 Abr 2009 -
Data do Fascículo
Jul 2001
Histórico
-
Recebido
11 Maio 2000 -
Aceito
20 Jun 2001
