Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil

Temporal variability of the macrofauna density and its relationship with water and sediments characteristics were studied through monthly sampling at an estuarine embayment of the Patos Lagoon, Brazil from January to December 2001. Both, water and sediments characteristics showed distinct seasonal p...

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Autores principales:	Rosa,Leonardo C, Bemvenuti,Carlos E
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2006
Materias:	Benthos shallow water estuary southwest Atlantic Ocean
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100003
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spelling	oai:scielo:S0718-195720060001000032006-11-23Temporal variability of the estuarine macrofauna of the Patos Lagoon, BrazilRosa,Leonardo CBemvenuti,Carlos E Benthos shallow water estuary southwest Atlantic Ocean Temporal variability of the macrofauna density and its relationship with water and sediments characteristics were studied through monthly sampling at an estuarine embayment of the Patos Lagoon, Brazil from January to December 2001. Both, water and sediments characteristics showed distinct seasonal patterns. High salinity and water temperature values were registered in summer months. Increase of fine fractions in the sediments occurred in cold months. A total of 38,827 individuals represented by 18 species were collected during the study period. The bivalve Erodona mactroides, the tanaid Kalliapseudes schübartii, the polychaetes Heteromastus similis and Nephtys fluviatilis, and the gastropod Heleobia australis were the dominant organisms, accounting for more than 90% of total macrofauna. The macrofauna also showed a seasonal pattern, with the highest density found in summer (January = 62,205 ind. m-2) and the lowest one in winter (July = 9,410 ind. m-2). This pattern results from the species reproductive process, which was strongly correlated to the increase of water temperature at the end of spring. The low macrofauna densities in winter are related to a high predation during summer along with the absence of effective recruitment in cold months. Furthermore, sedimentary proprieties changes due to natural climatic disturbances could also be important factors controlling the estuarine macrofauna of the Patos Lagoon by increasing mortality ratesinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.41 n.1 20062006-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100003en10.4067/S0718-19572006000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Benthos shallow water estuary southwest Atlantic Ocean
spellingShingle	Benthos shallow water estuary southwest Atlantic Ocean Rosa,Leonardo C Bemvenuti,Carlos E Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
description	Temporal variability of the macrofauna density and its relationship with water and sediments characteristics were studied through monthly sampling at an estuarine embayment of the Patos Lagoon, Brazil from January to December 2001. Both, water and sediments characteristics showed distinct seasonal patterns. High salinity and water temperature values were registered in summer months. Increase of fine fractions in the sediments occurred in cold months. A total of 38,827 individuals represented by 18 species were collected during the study period. The bivalve Erodona mactroides, the tanaid Kalliapseudes schübartii, the polychaetes Heteromastus similis and Nephtys fluviatilis, and the gastropod Heleobia australis were the dominant organisms, accounting for more than 90% of total macrofauna. The macrofauna also showed a seasonal pattern, with the highest density found in summer (January = 62,205 ind. m-2) and the lowest one in winter (July = 9,410 ind. m-2). This pattern results from the species reproductive process, which was strongly correlated to the increase of water temperature at the end of spring. The low macrofauna densities in winter are related to a high predation during summer along with the absence of effective recruitment in cold months. Furthermore, sedimentary proprieties changes due to natural climatic disturbances could also be important factors controlling the estuarine macrofauna of the Patos Lagoon by increasing mortality rates
author	Rosa,Leonardo C Bemvenuti,Carlos E
author_facet	Rosa,Leonardo C Bemvenuti,Carlos E
author_sort	Rosa,Leonardo C
title	Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
title_short	Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
title_full	Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
title_fullStr	Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
title_full_unstemmed	Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil
title_sort	temporal variability of the estuarine macrofauna of the patos lagoon, brazil
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100003
work_keys_str_mv	AT rosaleonardoc temporalvariabilityoftheestuarinemacrofaunaofthepatoslagoonbrazil AT bemvenuticarlose temporalvariabilityoftheestuarinemacrofaunaofthepatoslagoonbrazil
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Temporal variability of the estuarine macrofauna of the Patos Lagoon, Brazil

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