Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S)
The aim of this study was to compile and analyse available historical information on echinoderms in the southwestern Atlantic Ocean in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution of echinoderm assemblages and to test the validity of t...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2014-06-01
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| Series: | Scientia Marina |
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| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1520 |
| _version_ | 1818940596651294720 |
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| author | Valeria Souto Mariana Escolar Gabriel Genzano Claudia Bremec |
| author_facet | Valeria Souto Mariana Escolar Gabriel Genzano Claudia Bremec |
| author_sort | Valeria Souto |
| collection | DOAJ |
| description | The aim of this study was to compile and analyse available historical information on echinoderms in the southwestern Atlantic Ocean in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution of echinoderm assemblages and to test the validity of the current zoogeographic scheme for this group. This study was conducted on the Argentinean continental shelf, southwestern Atlantic Ocean (34-56°S). An intensive research on geo-referenced data was carried out to make a knowledge synthesis on echinoderm species and thus create a historical database. Multivariate analysis was used to analyse the faunal composition through latitudinal and bathymetric gradients as well as echinoderm associations. The results confirmed the existence of two faunal associations that correspond to the traditional zoogeographic scheme established for the Argentine Sea: the Argentinean and Magellan Provinces. The Argentinean Province had 46 widely distributed species. Of the 86 species recorded in the Magellan Province, a high percentage (25%) were also found in Antarctic waters, suggesting a strong connection between the echinoderm fauna of this province and the Antarctic Region. The species richness between 34 and 56°S in the Atlantic Ocean showed a significant increase in reference to latitude, with the highest values being recorded between 46 and 56°S. In view of the high percentage of shared species with Antarctica, considered a hot-spot region in terms of echinoderm diversity, the pattern of distribution of species richness observed in our study area could correspond to a dispersion of this species from Antarctic to sub-Antarctic regions. |
| first_indexed | 2024-12-20T06:42:10Z |
| format | Article |
| id | doaj.art-cc29fd45045e456891681024e782e49c |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-20T06:42:10Z |
| publishDate | 2014-06-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-cc29fd45045e456891681024e782e49c2022-12-21T19:49:49ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342014-06-0178226928010.3989/scimar.03882.26B1494Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S)Valeria Souto0Mariana Escolar1Gabriel Genzano2Claudia Bremec3Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP) - Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Investigaciones Marinas y Costeras (CONICET-UNMdP) - Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)The aim of this study was to compile and analyse available historical information on echinoderms in the southwestern Atlantic Ocean in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution of echinoderm assemblages and to test the validity of the current zoogeographic scheme for this group. This study was conducted on the Argentinean continental shelf, southwestern Atlantic Ocean (34-56°S). An intensive research on geo-referenced data was carried out to make a knowledge synthesis on echinoderm species and thus create a historical database. Multivariate analysis was used to analyse the faunal composition through latitudinal and bathymetric gradients as well as echinoderm associations. The results confirmed the existence of two faunal associations that correspond to the traditional zoogeographic scheme established for the Argentine Sea: the Argentinean and Magellan Provinces. The Argentinean Province had 46 widely distributed species. Of the 86 species recorded in the Magellan Province, a high percentage (25%) were also found in Antarctic waters, suggesting a strong connection between the echinoderm fauna of this province and the Antarctic Region. The species richness between 34 and 56°S in the Atlantic Ocean showed a significant increase in reference to latitude, with the highest values being recorded between 46 and 56°S. In view of the high percentage of shared species with Antarctica, considered a hot-spot region in terms of echinoderm diversity, the pattern of distribution of species richness observed in our study area could correspond to a dispersion of this species from Antarctic to sub-Antarctic regions.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1520biodiversitybiogeographydistribution patternsechinodermspecies richnesssouthwestern atlantic |
| spellingShingle | Valeria Souto Mariana Escolar Gabriel Genzano Claudia Bremec Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) Scientia Marina biodiversity biogeography distribution patterns echinoderm species richness southwestern atlantic |
| title | Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) |
| title_full | Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) |
| title_fullStr | Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) |
| title_full_unstemmed | Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) |
| title_short | Species richness and distribution patterns of echinoderms in the southwestern Atlantic Ocean (34-56°S) |
| title_sort | species richness and distribution patterns of echinoderms in the southwestern atlantic ocean 34 56°s |
| topic | biodiversity biogeography distribution patterns echinoderm species richness southwestern atlantic |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1520 |
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