Artículo

Resumen:

Foaram amostrados besouros carpófilos no dossel de 4 fragmentos florestais no Sudeste do Brasil. Em cada fragmento foram selecionados 2 pontos, distantes entre si pelo menos 50 m, os quais foram amostrados em 2 dias consecutivos. Utilizaram-se armadilhas com isca de banana fermentada que permaneceram no campo por 24 h, dispostas em 4 níveis de altura no dossel (1.5 m, 4.5 m, 7.5 m e 10.5 m), visando determinar a distribuição vertical no dossel quanto à riqueza, a abundância relativa e a composição de espécies. Foram coletados 1236 coleópteros (86 espécies pertencentes a 19 famílias). As famílias mais diversas foram Nitidulidae (26.4% das espécies), Staphylinidae (20.7%) e Cerambycidae (9.2%). Os níveis de altura superiores apresentaram maior riqueza e abundância relativa de espécies. O nível inferior de altura (1.5 m) apresentou menor riqueza de espécies que os demais. A maior concentração das espécies e indivíduos nos níveis de altura superiores da floresta é discutida em relação ao microclima e à distribuição de recursos alimentares. A distribuição das espécies entre os fragmentos foi heterogênea, possivelmente respondendo ao efeito de suas diferentes áreas, formas e graus de preservação.

Abstract:

Fragmentation is one of the most important issues for conservation challenges. Habitat fragmentation results in the interruption of many biological processes that are essential for keeping the structure and functioning of natural ecosystems. The maintenance of habitat structure and its consequences in diversity is highly connected to spatial heterogeneity. There are many studies about spatial heterogeneity of habitats concerning horizontal effects; however, a new focus is given to vertical resource distribution, considering that half of the world’s biological diversity must be sheltered in the canopy. This study was conducted in 4 Atlantic forest fragments near the town of Lavras, State of Minas Gerais, Brazil, and its main objective was to analyze the diversity and vertical distribution of carpophylous beetles (Insecta: Coleoptera) inside and between forest patches. At each forest fragment, beetles were sampled in 2 consecutive days, at 2 distinct points at least 50 m apart. Traps were baited with fermented banana and exposed for 24 h in 4 different strata of the canopy (1.5 m, 4.5 m, 7.5 m and 10.5 m high). A total of 1236 beetles were sampled (86 species from 19 families). The most diverse families were Nitidulidae (26.4% of the species), Staphylinidae (20.7%) and Cerambycidae (9.2%). We observed a significant difference in the vertical distribution of composition of species and structure of the analyzed communities, with the upper stratum presenting a higher species richness and relative abundance. Explanations for the distribution observed are discussed regarding the availability of food resources and microhabitat characteristics. Species distribution among fragments was not homogeneous, being probably the result of the differences present in areas, shapes and conservation levels of the sampled fragments.

Registro:

Título:Estratificação vertical de coleópteros carpófilos (Insecta: Coleoptera) em fragmentos florestais do sul do Estado de Minas Gerais, Brasil
Título alt:Vertical stratification of carpophilous beetles (Insecta: Coleoptera) in forest fragments in the Southeastern of Brazil
Autor:Gonçalves, Teresa T.; Louzada, Julio N. C.
Fecha:2005-06
Título revista:Ecología Austral
Editor:Asociación Argentina de Ecología
Handle: http://hdl.handle.net/20.500.12110/ecologiaaustral_v015_n01_p101
Ciudad:Buenos Aires
Idioma:Portugués
Palabras clave:BIODIVERSIDADE; DOSSEL; FRAGMENTAÇÃO FLORESTAL; ESTRUTURA DE COMUNIDADE; ECOLOGIA DE INSETOS
Keywords:BIODIVERSITY; CANOPY; FOREST FRAGMENTATION; COMMUNITY STRUCTURE; INSECT ECOLOGY
Año:2005
Volumen:015
Número:01
Título revista abreviado:Ecología Austral (en línea)
ISSN:1667-782X
Formato:PDF
PDF:https://bibliotecadigital.exactas.uba.ar/download/ecologiaaustral/ecologiaaustral_v015_n01_p101.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v015_n01_p101

Citas:

---------- APA ----------
Gonçalves, Teresa T. & Louzada, Julio N. C. (2005) . Vertical stratification of carpophilous beetles (Insecta: Coleoptera) in forest fragments in the Southeastern of Brazil. Ecología Austral, 015 (01) .
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v015_n01_p101 [ ]
---------- CHICAGO ----------
Gonçalves, Teresa T., Louzada, Julio N. C. "Vertical stratification of carpophilous beetles (Insecta: Coleoptera) in forest fragments in the Southeastern of Brazil" . Ecología Austral 015, no. 01 (2005) .
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v015_n01_p101 [ ]
---------- MLA ----------
Gonçalves, Teresa T., Louzada, Julio N. C. "Vertical stratification of carpophilous beetles (Insecta: Coleoptera) in forest fragments in the Southeastern of Brazil" . Ecología Austral, vol. 015, no. 01, 2005.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v015_n01_p101 [ ]
---------- VANCOUVER ----------
Gonçalves, Teresa T., Louzada, Julio N. C. Vertical stratification of carpophilous beetles (Insecta: Coleoptera) in forest fragments in the Southeastern of Brazil. Ecología Austral (en línea). 2005;015(01).
Available from: https://bibliotecadigital.exactas.uba.ar/collection/ecologiaaustral/document/ecologiaaustral_v015_n01_p101 [ ]