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Authors

  • Paulo Roberto Pagliosa Sociedade Fritz Müller de Ciências Naturais Caixa Postal 1644, 80.011-970 Curitiba – PR

Abstract

Intertidal to subtidal distribution of benthic macrofauna in an estuarine beach of Babitonga Bay, southern Brazil. This paper reports on the spatial variation of a macrofaunal community along the intertidalsubtidal
gradient of an estuarine beach located at the mouth of Babitonga Bay, in Southern Brazil. The fauna and sediment were sampled at 0, 5, 10, and 20 m depths in three transects. Differences in benthic assemblages
among the depths were found to be significant and related to the major local processes of sediment changes. The analysis of taxa composition showed an impoverished community subject to wave action and erosio naccretion dynamics at landward stations (0 and 5 m depths). Seaward macrofauna (10 and 20 m depths) inhabiting sediments with higher organic content and poorly-sorted sands were more diverse and numerically dominated by ophiuroids and by cirratulid (Tharyx sp.) and maldanid (Clymenella brasiliensis) polychaetes. A breakdown in the zonation patterns of environment and community was detected where sediments produced by a creek outlet enabled increasing stability and higher densities of the soft bottom anthozoa Edwardsia sp. and the polychaete Lumbrineris atlantica. Additionally, the sediments with an excessive amount of fine particles were densely colonized (mean of 22,400 individuals.m-2) by C. brasiliensis. The local sediment characteristics were related to maldanid sediment-reworking. The macrofaunal species compositions along the sandy beaches
at the mouths of the southern Brazilian estuarine systems were compared.

Author Biography

Paulo Roberto Pagliosa, Sociedade Fritz Müller de Ciências Naturais Caixa Postal 1644, 80.011-970 Curitiba – PR

Paulo Roberto Pagliosa Alves  Possui graduação em Ciências Biológicas pela Universidade Federal do Paraná (1993), mestrado em Zoologia pela Universidade Federal do Paraná (1997) e doutorado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (2004). Atualmente é Professor Adjunto da Universidade Federal de Santa Catarina. Tem experiência na área de Ecologia de comunidades, atuando principalmente nos seguintes temas: macroinvertebrados aquáticos, macrofauna bêntica, limnologia, oceanografia e ambientes de transição. Certificado pelo autor em 05/10/11

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Published

2006-01-01

Issue

Vol. 19 No. 1 (2006)

Section

Artigos

License

Copyright (c) 2006 Paulo Roberto Pagliosa

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