Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period
The aim of this study was to evaluate the distribution and density of Anomalocardia brasiliana along a 22 km stretch of beaches in the western region of Rio Grande do Norte during and after periods of unusual rainfall related to the La Niña phenomenon. Four samples were taken every six months betwee...
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Universidade Federal de Santa Catarina
2013-03-01
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Online Access: | http://www.biotemas.ufsc.br/volumes/pdf/volume261/109a122.pdf |
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doaj-3843bef69d254c0dac385154183a1a392020-11-24T22:19:19ZengUniversidade Federal de Santa CatarinaBiotemas0103-16432013-03-01261109122Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall periodTalita Pinheiro BelémRodrigo Sávio Teixeira de MouraGustavo Gonzaga Henry-SilvaThe aim of this study was to evaluate the distribution and density of Anomalocardia brasiliana along a 22 km stretch of beaches in the western region of Rio Grande do Norte during and after periods of unusual rainfall related to the La Niña phenomenon. Four samples were taken every six months between April 2009 and October 2010, where imaginary lines were made perpendicular to the beach, along a spatial gradient of distance from the estuary, to collect organisms, sediments and temperature and salinity water data. There were no significant differences in A. brasiliana density between the different seasons, and the average density was 218 ind/m² in April 2009, 198 ind/m² in October 2009, 233 ind/m² in April 2010 and 200 ind/m² in October 2010. A. brasiliana showed a well-defined pattern of distribution, with its occurrence restricted mainly to the Apodi/Mossoró River estuary, where the organic matter content of the sediment was higher. Thus, this species has low resilience, since it could not regain the density it displayed prior to March 2008, before the heavy rains caused by the La Niña phenomenon.http://www.biotemas.ufsc.br/volumes/pdf/volume261/109a122.pdfEstuaryLa NiñaOrganic matterShellfishSpatial distribution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Talita Pinheiro Belém Rodrigo Sávio Teixeira de Moura Gustavo Gonzaga Henry-Silva |
spellingShingle |
Talita Pinheiro Belém Rodrigo Sávio Teixeira de Moura Gustavo Gonzaga Henry-Silva Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period Biotemas Estuary La Niña Organic matter Shellfish Spatial distribution |
author_facet |
Talita Pinheiro Belém Rodrigo Sávio Teixeira de Moura Gustavo Gonzaga Henry-Silva |
author_sort |
Talita Pinheiro Belém |
title |
Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period |
title_short |
Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period |
title_full |
Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period |
title_fullStr |
Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period |
title_full_unstemmed |
Distribution and density of the bivalve Anomalocardia brasiliana in Rio Grande do Norte beaches during an atypical rainfall period |
title_sort |
distribution and density of the bivalve anomalocardia brasiliana in rio grande do norte beaches during an atypical rainfall period |
publisher |
Universidade Federal de Santa Catarina |
series |
Biotemas |
issn |
0103-1643 |
publishDate |
2013-03-01 |
description |
The aim of this study was to evaluate the distribution and density of Anomalocardia brasiliana along a 22 km stretch of beaches in the western region of Rio Grande do Norte during and after periods of unusual rainfall related to the La Niña phenomenon. Four samples were taken every six months between April 2009 and October 2010, where imaginary lines were made perpendicular to the beach, along a spatial gradient of distance from the estuary, to collect organisms, sediments and temperature and salinity water data. There were no significant differences in A. brasiliana density between the different seasons, and the average density was 218 ind/m² in April 2009, 198 ind/m² in October 2009, 233 ind/m² in April 2010 and 200 ind/m² in October 2010. A. brasiliana showed a well-defined pattern of distribution, with its occurrence restricted mainly to the Apodi/Mossoró River estuary, where the organic matter content of the sediment was higher. Thus, this species has low resilience, since it could not regain the density it displayed prior to March 2008, before the heavy rains caused by the La Niña phenomenon. |
topic |
Estuary La Niña Organic matter Shellfish Spatial distribution |
url |
http://www.biotemas.ufsc.br/volumes/pdf/volume261/109a122.pdf |
work_keys_str_mv |
AT talitapinheirobelem distributionanddensityofthebivalveanomalocardiabrasilianainriograndedonortebeachesduringanatypicalrainfallperiod AT rodrigosavioteixeirademoura distributionanddensityofthebivalveanomalocardiabrasilianainriograndedonortebeachesduringanatypicalrainfallperiod AT gustavogonzagahenrysilva distributionanddensityofthebivalveanomalocardiabrasilianainriograndedonortebeachesduringanatypicalrainfallperiod |
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