Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S)
In this study, we analyse spatial patterns of macrobenthic communities of the Río de la Plata system, and assess the species turnover or beta diversity and its relationship with environmental gradients. Macrobenthic samples and physico-chemical parameters were collected from 20 sampling sites along a transect of 560 km, including the freshwater (FW), estuarine (ES)and marine (MA)sectors. Three main assemblages corresponding to the above mentioned sectors were defined with multivariate analysis (cluster, MDS). In total 134 taxa were recorded, 81 in MA, 33 in FW and 38 in ES, represented mainly by polychaete, mollusc and crustacean species. Depth, salinity and clay showed the strongest correlation with the observed faunal patterns (pw=0.62; BIO-ENV analysis). Beta diversity varied between dominant taxonomic groups and was positively correlated with changes in salinity. The high variability in the composition of assemblages was reflected in beta diversity, reaching its highest values at the boundaries between the defined sectors. This study suggests that beta diversity represents a useful tool to define ecological boundaries for benthic communities in the Río de la Plata.
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Format: | Journal Contribution biblioteca |
Language: | English |
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2007
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Subjects: | Estuaries, Macrobenthos, Brackishwater environment, Assemblages, |
Online Access: | http://hdl.handle.net/1834/1571 |
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dig-aquadocs-1834-15712021-05-19T06:22:57Z Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) Giberto, D.A. Bremec, C. Cortelezzi, A. Rodrigues Capitulo, A. Brazeiro, A. Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries In this study, we analyse spatial patterns of macrobenthic communities of the Río de la Plata system, and assess the species turnover or beta diversity and its relationship with environmental gradients. Macrobenthic samples and physico-chemical parameters were collected from 20 sampling sites along a transect of 560 km, including the freshwater (FW), estuarine (ES)and marine (MA)sectors. Three main assemblages corresponding to the above mentioned sectors were defined with multivariate analysis (cluster, MDS). In total 134 taxa were recorded, 81 in MA, 33 in FW and 38 in ES, represented mainly by polychaete, mollusc and crustacean species. Depth, salinity and clay showed the strongest correlation with the observed faunal patterns (pw=0.62; BIO-ENV analysis). Beta diversity varied between dominant taxonomic groups and was positively correlated with changes in salinity. The high variability in the composition of assemblages was reflected in beta diversity, reaching its highest values at the boundaries between the defined sectors. This study suggests that beta diversity represents a useful tool to define ecological boundaries for benthic communities in the Río de la Plata. Published macrobentos, estuarios, asociaciones, ambientes salobres 2007-07-14T15:29:08Z 2007-07-14T15:29:08Z 2007 Journal Contribution Journal of the Marine Biological Association of the United Kingdom, 87(2). p. 377-381 0025-3154 http://hdl.handle.net/1834/1571 en http://www.journals.cambridge.org Publisher permission 315273 bytes application/pdf Argentina, Buenos Aires, Uruguay, Río de la Plata |
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Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries |
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Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries Giberto, D.A. Bremec, C. Cortelezzi, A. Rodrigues Capitulo, A. Brazeiro, A. Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
description |
In this study, we analyse spatial patterns of macrobenthic communities of the Río de la Plata system, and assess the species turnover or beta diversity and its relationship with environmental gradients. Macrobenthic samples and physico-chemical parameters were collected from 20 sampling sites along a transect of 560 km, including the freshwater (FW), estuarine (ES)and marine (MA)sectors. Three main assemblages corresponding to the above mentioned sectors were defined with multivariate analysis (cluster, MDS). In total 134 taxa were recorded, 81 in MA, 33 in FW and 38 in ES, represented mainly by polychaete, mollusc and crustacean species. Depth, salinity and clay showed the strongest correlation with the observed faunal patterns (pw=0.62; BIO-ENV analysis). Beta diversity varied between dominant taxonomic groups and was positively correlated with changes in salinity. The high variability in the composition of assemblages was reflected in beta diversity, reaching its highest values at the boundaries between the defined sectors. This study suggests that beta diversity represents a useful tool to define ecological boundaries for benthic communities in the Río de la Plata. |
format |
Journal Contribution |
topic_facet |
Estuaries Macrobenthos Brackishwater environment Macrobenthos Assemblages Brackishwater environment Estuaries |
author |
Giberto, D.A. Bremec, C. Cortelezzi, A. Rodrigues Capitulo, A. Brazeiro, A. |
author_facet |
Giberto, D.A. Bremec, C. Cortelezzi, A. Rodrigues Capitulo, A. Brazeiro, A. |
author_sort |
Giberto, D.A. |
title |
Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
title_short |
Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
title_full |
Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
title_fullStr |
Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
title_full_unstemmed |
Ecological boundaries in estuaries: macrobenthic ß-diversity in the Rio de la Plata system (34-36°S) |
title_sort |
ecological boundaries in estuaries: macrobenthic ß-diversity in the rio de la plata system (34-36°s) |
publishDate |
2007 |
url |
http://hdl.handle.net/1834/1571 |
work_keys_str_mv |
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1756075383398072320 |