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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Benthic macroinvertebrates in the Paranapanema reservoir cascade (southeast Brazil)

Texto completo
Autor(es):
Jorcin, A. [1] ; Nogueira, M. G. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista UNESP, Inst Biociencias, Dept Zool, BR-18618000 Botucatu, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Brazilian Journal of Biology; v. 68, n. 4, p. 1013-1024, NOV 2008.
Citações Web of Science: 23
Resumo

In this study, the composition, specific richness and abundance of benthic macroinvertebrates (< 250 mu m) from sediments of eight reservoirs of the Paranapanema River (southeast Brazil), as well as from the main tributaries (Taquari, Pardo and Tibagi) and the month zone into the Parana River were analyzed. Nineteen points distributed along 700 km were sampled quarterly (8 campaigns) during a two-year period (2000 and 2001). The zoobenthos was characterized by a high species richness, (c.a. 100 taxa), with the predominance of Diptera Chironomidae (c.a. 50 taxa). There was a great spatial variation in the assemblage structure, mainly when compared the lacustrine zones of the reservoirs in relation to the fluvial stretches. The Oligochaeta Narapa bonettoi was dominant in sampling stations with sandy sediments and high water velocity, mainly in the Pardo River and in the upstream and downstream of the Paranapanema river mouth (Parana River). Branchiura sowerbyi, other numerically important Oligochaeta, was abundant in regions of the Upper and middle Paranapanema basin. The mollusk bivalve Corbicula fluminea was widely distributed, occurring in most stations and sampling periods. A certain increment in richness and abundance of taxa occurred in the middle Paranapanema. Lower depth, higher flow and increase in the trophic conditions seem to favor the benthic fauna development in this region. A seasonal variation pattern during the two years of study could not be detected, especially concerning the zoobenthos abundance. (AU)

Processo FAPESP: 00/01536-1 - Limnologia comparada de oito reservatórios em cascata no Rio Paranapanema (SP-PR) com ênfase nos padrões de organização das comunidades fito e zooplanctônicas e zoobentônicas
Beneficiário:Adriana Teresita Jorcin Delgado
Linha de fomento: Bolsas no Brasil - Apoio a Jovens Pesquisadores
Processo FAPESP: 99/09667-9 - Limnologia comparada de oito reservatórios em cascata no rio Paranapanema (SP-PR) com ênfase nos padrões de organização das comunidades fito e zooplanctônicas e zoobentônicas
Beneficiário:Marcos Gomes Nogueira
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores