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Free Content Polychaete Distribution and Abundance in Intertidal Flats of Paranaguá Bay (SE Brazil)

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The effects of plant zonation on polychaete distribution and abundance were studied along an environmental gradient in intertidal flats of Paranaguá Bay (SE Brazil). Two polychaete stocks with marked preference for specific haline regimes were recognized with a low degree of spatial overlap in species distribution. Species richness and abundance were lower in the mesohaline sector, characterized by fine sediments and high organic carbon content, than in the high-energy euhaline sector, dominated by moderately sorted fine sands low in organic carbon content. Faunal differences were primarily defined by salinity and environmental energy gradients and only secondarily by the ability of polychaetes to discriminate among unvegetated, salt marsh or mangrove swamp habitats.

Document Type: Research Article

Publication date: March 1, 1997

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