Spatial distribution of Polychaeta in a soft-bottom community at Saco do Céu

Ana Cláudia dos Santos Brasil; Gonçalves da Silva e Sérgio Henrique

Referência Bibliográfica:
DOS SANTOS BRASIL, Ana Cláudia; GONÇALVES DA SILVA, Sérgio Henrique. Spatial distribution of Polychaeta in a soft-bottom community at Saco do Céu, Ilha Grande, Rio de Janeiro, Brazil. Boletim de Ciências Marinhas, University of Miami, v. 67, n. 1, p.103-112, jul. 2000.

Local: Rio de Janeiro
Ano: 2000
Instituição: University of Miami Volume: 67 Páginas: 103-112

Resumo:
Polychaete worms represent an important group in soft bottom communities and their spatial structure is always closely related to grain size and other factors such as organic content. The main purpose of this study was to determine the spatial distribution of polychaetes in the bottom of a small and shallow bay (Saco do Céu), at Ilha Grande Island, Rio de Janeiro, Brazil. Thirty-nine stations were sampled over the bay at two different times of the year (January and July 1992). The Mantel test was used to compare sediment and biological matrices for January and July. The bottom of the studied area formed a mosaic which varied from fine to very coarse sand. The most abundant species were: Glycinde multidens, Sigambra grubii, Paraprionospio pinnata, Mediomastus californiensis, Armandia agilis in fine sand and Magelona papillicornis, Goniadides carolinae, Eunice vittata in coarse sand. The cluster analysis and the Canonical Correspondence Analysis (CCA) indicated the existence of different groups associated to the two types of sediment. Community composition did not vary between the two periods of the year sampled (summer and winter), thus suggests that the spatial distribution of polychaetes at Saco do Céu may be determined by grain-size characteristics and by organic matter conntent.

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