Estrutura da comunidade de invertebrados bentônicos em dois cursos d'água do Rio Grande do Sul, Brasil



Título del documento: Estrutura da comunidade de invertebrados bentônicos em dois cursos d'água do Rio Grande do Sul, Brasil
Revista: Revista brasileira de zoologia
Base de datos: PERIÓDICA
Número de sistema: 000281098
ISSN: 0101-8175
Autores: 1

Instituciones: 1Universidade Federal do Rio Grande do Sul, Instituto de Biociencias, Porto Alegre, Rio Grande do Sul. Brasil
Año:
Periodo: Mar
Volumen: 20
Número: 1
Paginación: 115-125
País: Brasil
Idioma: Portugués
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés The benthic fauna has an important role in the trophic chain of limnic environments, serving as food for fishes and crustaceans. This work aimed to identify and compare, quantitative and qualitatively, the macrobenthic communities from two watercourses in Rio Grande do Sul State. Samplings were done with a Surber sampler, monthly, from September 1999 to August 2000, in one of the creeks forming Tainhas River(29º15'30,2"S, 50º13'12,5";W), around São Francisco de Paula city and in Mineiro Creek (29º30'0,2"S, 50º46'50"W), around Taquara city. At each sampling point, physical and chemical variables of the waters were registered. In the laboratory, the samples were sorted out and the animals identified and quantified. Dissolved oxigen, pH and stream speed were very similar for both environments, whilst conductivity had extreme values. Insects, crustaceans, acari and molluscs dominated in the samples. Abundance, richness and diversity indexes in Tainhas subsidiary had relatively higher average values than Mineiro Creek. Similarity matrix groupings between sampling units indicate three groups. Our research revealed important characteristics of the ecology and distribution of benthic invertebrates, information that can subsidise future environmental monitoring in the region of São Francisco de Paula and Taquara
Disciplinas: Biología
Palabras clave: Ecología,
Invertebrados,
Macroinvertebrados acuáticos,
Estructura de la comunidad,
Biodiversidad,
Lista de especies,
Dendrogramas,
Brasil
Keyword: Biology,
Ecology,
Invertebrates,
Aquatic macroinvertebrates,
Community structure,
Biodiversity,
Species checklist,
Dendrograms,
Brazil
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