Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil
The spatial distribution of benthic macrofauna on the beaches of Tramandaí, Jardim do Éden and Harmonia, was investigated over five consecutive days in April, 2003. The distribution pattern was also analyzed along with environmental parameters. Three transects were set on each beach, 50 m apart, wit...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2006-09-01
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| Series: | Brazilian Journal of Oceanography |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592006000200004 |
| _version_ | 1818118810580811776 |
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| author | Frederico Monteiro Neves Carlos Emílio Bemvenuti |
| author_facet | Frederico Monteiro Neves Carlos Emílio Bemvenuti |
| author_sort | Frederico Monteiro Neves |
| collection | DOAJ |
| description | The spatial distribution of benthic macrofauna on the beaches of Tramandaí, Jardim do Éden and Harmonia, was investigated over five consecutive days in April, 2003. The distribution pattern was also analyzed along with environmental parameters. Three transects were set on each beach, 50 m apart, with four sample stations set along each transect. On every station, three samples of benthic macrofauna were taken daily, with a core sampler with 20 cm diameter. In the midlittoral zone, the polychaete Euzonus furciferus and the isopod Excirolana armata dominated. In the swash zone, tidal migrators, Emerita brasiliensis,Donax hanlevanus and Mesodesma mactroides, were the most abundant species and, on some days, the polychaete Scolelepis gaucha. In the lower zones of the beaches, D. hanleyanus,M. mactroides and the amphipod Puelche orensani dominated. This zonation pattern was found for all three studied beaches, based on the average density of each species, over the five days period. Horizontal variation in the fauna was not found, either inter or intra the studied beaches, possibly due to little variability in slope and homogeneity of sediment grain size presented in the three beaches.<br>A distribuição espacial da macrofauna bentônica nas praias de Tramandaí, Jardim do Éden e Harmonia foi investigadadurante cinco dias consecutivos no mês de abril de 2003. Foi analisado também o padrão de distribuição da fauna em relação aos parâmetros ambientais. Foram demarcadas três transversais distantes 50 m uma da outra em cada praia e em cada transversal foram inseridas 4 estações, nas quais foram tomadas diariamente 3 amostras da macrofauna bentônica com um corer de 20 cm de diâmetro. No mesolitoral dominaram o poliqueta Euzonus furciferus e o isópode Excirolana armata. Na zona de varrido, os migradores mareaisEmerita brasiliensis,Donax hanleyanus e Mesodesma mactroides foram os mais abundantes. Nas zonas inferiores das praias, dominaram D. hanleyanus,M. mactroides e o anfípode Puelche orensanzi. Este padrão de zonação foi encontrado para as três praias com base na média da densidade de cada espécie nos cinco dias estudados. Não foi encontrada variação na distribuição horizontal da fauna dentro e entre praias, provavelmente, devido a pouca variabilidade da declividade e a homogeneidade do tamanho do grão de sedimento que apresentaram as três praias. |
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| issn | 1679-8759 1982-436X |
| language | English |
| last_indexed | 2024-12-11T05:00:13Z |
| publishDate | 2006-09-01 |
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| series | Brazilian Journal of Oceanography |
| spelling | doaj.art-4fddc749f7814523aed0c8cf070ce3232022-12-22T01:20:10ZengUniversidade de São PauloBrazilian Journal of Oceanography1679-87591982-436X2006-09-01542-313514510.1590/S1679-87592006000200004Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern BrazilFrederico Monteiro NevesCarlos Emílio BemvenutiThe spatial distribution of benthic macrofauna on the beaches of Tramandaí, Jardim do Éden and Harmonia, was investigated over five consecutive days in April, 2003. The distribution pattern was also analyzed along with environmental parameters. Three transects were set on each beach, 50 m apart, with four sample stations set along each transect. On every station, three samples of benthic macrofauna were taken daily, with a core sampler with 20 cm diameter. In the midlittoral zone, the polychaete Euzonus furciferus and the isopod Excirolana armata dominated. In the swash zone, tidal migrators, Emerita brasiliensis,Donax hanlevanus and Mesodesma mactroides, were the most abundant species and, on some days, the polychaete Scolelepis gaucha. In the lower zones of the beaches, D. hanleyanus,M. mactroides and the amphipod Puelche orensani dominated. This zonation pattern was found for all three studied beaches, based on the average density of each species, over the five days period. Horizontal variation in the fauna was not found, either inter or intra the studied beaches, possibly due to little variability in slope and homogeneity of sediment grain size presented in the three beaches.<br>A distribuição espacial da macrofauna bentônica nas praias de Tramandaí, Jardim do Éden e Harmonia foi investigadadurante cinco dias consecutivos no mês de abril de 2003. Foi analisado também o padrão de distribuição da fauna em relação aos parâmetros ambientais. Foram demarcadas três transversais distantes 50 m uma da outra em cada praia e em cada transversal foram inseridas 4 estações, nas quais foram tomadas diariamente 3 amostras da macrofauna bentônica com um corer de 20 cm de diâmetro. No mesolitoral dominaram o poliqueta Euzonus furciferus e o isópode Excirolana armata. Na zona de varrido, os migradores mareaisEmerita brasiliensis,Donax hanleyanus e Mesodesma mactroides foram os mais abundantes. Nas zonas inferiores das praias, dominaram D. hanleyanus,M. mactroides e o anfípode Puelche orensanzi. Este padrão de zonação foi encontrado para as três praias com base na média da densidade de cada espécie nos cinco dias estudados. Não foi encontrada variação na distribuição horizontal da fauna dentro e entre praias, provavelmente, devido a pouca variabilidade da declividade e a homogeneidade do tamanho do grão de sedimento que apresentaram as três praias.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592006000200004macrofauna bentônicadistribuição espacial e temporalpraias arenosaslitoral do Rio Grande do Sulbenthic macrofaunaspatial and temporal distributionsandy beachesRio Grande do Sul littoral |
| spellingShingle | Frederico Monteiro Neves Carlos Emílio Bemvenuti Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil Brazilian Journal of Oceanography macrofauna bentônica distribuição espacial e temporal praias arenosas litoral do Rio Grande do Sul benthic macrofauna spatial and temporal distribution sandy beaches Rio Grande do Sul littoral |
| title | Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil |
| title_full | Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil |
| title_fullStr | Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil |
| title_full_unstemmed | Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil |
| title_short | Spatial distribution of macrobenthic fauna on three sandy beaches from northern Rio Grande do Sul, southern Brazil |
| title_sort | spatial distribution of macrobenthic fauna on three sandy beaches from northern rio grande do sul southern brazil |
| topic | macrofauna bentônica distribuição espacial e temporal praias arenosas litoral do Rio Grande do Sul benthic macrofauna spatial and temporal distribution sandy beaches Rio Grande do Sul littoral |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592006000200004 |
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