Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución.
The assessment of biodiversity is important to understand the ecological patterns of species distribution as well as the functioning of ecosystems, and to manage the use of marine resources and conservation. The aim of this thesis was to compile and analyze available historical information on hydroids, polychaetes, decapod crustaceans and echinoderms in the South Western Atlantic Ocean, between 34° and 56° S, in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution assemblages and to test the validity of the current zoogeographic scheme established for the study area. Multivariate analysis was used to analyze the faunal composition through latitudinal and bathymetric gradients as well as for identifying different associations of benthic invertebrates. The species richness recorded was high for all groups and in all cases a certain number of species was considered of doubtful validity, consequence of the spatial-temporal discontinuity of their records. The species richness in echinoderms and polychaetes increases significantly towards higher latitudes, which could be related with the high diversity of these groups in the Antarctic Region. This correlation was not significant for hydroids, however, areas where the richness reached high values that could be related to the presence of suitable substrates for their successful settlement were identified. Decapod crustaceans did not exhibit any pattern in relation to latitude. Though, a pattern of decline in species richness at high latitudes has been cited for this group. 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 results also indicate that the Argentinean Province includes San Jorge Gulf (45° – 47° S).
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Format: | Thesis/Dissertation biblioteca |
Language: | Spanish / Castilian |
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Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales
2014
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Subjects: | Zoobentos, Diversidad de especies, Biodiversidad, Provincias faunísticas, Biogeografía, Composición de la comunidad, Distribución geográfica, Listas de especies, Hydrozoa, Polychaeta, Decapoda, Echinodermata, ASFA15::Y::Zoobenthos, ASFA15::S::Species diversity, ASFA15::B::Biodiversity, ASFA15::F::Faunal provinces, ASFA15::B::Biogeography, ASFA15::C::Community composition, ASFA15::G::Geographical distribution, ASFA15::C::Check lists, |
Online Access: | http://hdl.handle.net/1834/6803 |
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Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists |
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Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists Souto, V. Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
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The assessment of biodiversity is important to understand the ecological patterns of species distribution as well as the functioning of ecosystems, and to manage the use of marine resources and conservation. The aim of this thesis was to compile and analyze available historical information on hydroids, polychaetes, decapod crustaceans and echinoderms in the South Western Atlantic Ocean, between 34° and 56° S, in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution assemblages and to test the validity of the current zoogeographic scheme established for the study area. Multivariate analysis was used to analyze the faunal composition through latitudinal and bathymetric gradients as well as for identifying different associations of benthic invertebrates. The species richness recorded was high for all groups and in all cases a certain number of species was considered of doubtful validity, consequence of the spatial-temporal discontinuity of their records. The species richness in echinoderms and polychaetes increases significantly towards higher latitudes, which could be related with the high diversity of these groups in the Antarctic Region. This correlation was not significant for hydroids, however, areas where the richness reached high values that could be related to the presence of suitable substrates for their successful settlement were identified. Decapod crustaceans did not exhibit any pattern in relation to latitude. Though, a pattern of decline in species richness at high latitudes has been cited for this group. 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 results also indicate that the Argentinean Province includes San Jorge Gulf (45° – 47° S). |
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Thesis/Dissertation |
topic_facet |
Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists |
author |
Souto, V. |
author_facet |
Souto, V. |
author_sort |
Souto, V. |
title |
Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
title_short |
Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
title_full |
Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
title_fullStr |
Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
title_full_unstemmed |
Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
title_sort |
invertebrados bentónicos en el mar argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. |
publisher |
Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales |
publishDate |
2014 |
url |
http://hdl.handle.net/1834/6803 |
work_keys_str_mv |
AT soutov invertebradosbentonicosenelmarargentinoestadoactualdeconocimientoriquezaespecificaypatronesdedistribucion AT soutov benthicinvertebratesintheargentineseacurrentstateofknowledgespeciesrichnessanddistributionpatterns |
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1756075487632818176 |
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dig-aquadocs-1834-68032021-05-19T06:25:03Z Invertebrados bentónicos en el Mar Argentino: estado actual de conocimiento, riqueza específica y patrones de distribución. Benthic invertebrates in the Argentine Sea: current state of knowledge, species richness and distribution patterns. Souto, V. Zoobentos Diversidad de especies Biodiversidad Provincias faunísticas Biogeografía Composición de la comunidad Distribución geográfica Listas de especies Hydrozoa Polychaeta Decapoda Echinodermata ASFA15::Y::Zoobenthos ASFA15::S::Species diversity ASFA15::B::Biodiversity ASFA15::F::Faunal provinces ASFA15::B::Biogeography ASFA15::C::Community composition ASFA15::G::Geographical distribution ASFA15::C::Check lists The assessment of biodiversity is important to understand the ecological patterns of species distribution as well as the functioning of ecosystems, and to manage the use of marine resources and conservation. The aim of this thesis was to compile and analyze available historical information on hydroids, polychaetes, decapod crustaceans and echinoderms in the South Western Atlantic Ocean, between 34° and 56° S, in order to make a synthesis of present taxonomical knowledge, to identify patterns of geographical distribution assemblages and to test the validity of the current zoogeographic scheme established for the study area. Multivariate analysis was used to analyze the faunal composition through latitudinal and bathymetric gradients as well as for identifying different associations of benthic invertebrates. The species richness recorded was high for all groups and in all cases a certain number of species was considered of doubtful validity, consequence of the spatial-temporal discontinuity of their records. The species richness in echinoderms and polychaetes increases significantly towards higher latitudes, which could be related with the high diversity of these groups in the Antarctic Region. This correlation was not significant for hydroids, however, areas where the richness reached high values that could be related to the presence of suitable substrates for their successful settlement were identified. Decapod crustaceans did not exhibit any pattern in relation to latitude. Though, a pattern of decline in species richness at high latitudes has been cited for this group. 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 results also indicate that the Argentinean Province includes San Jorge Gulf (45° – 47° S). La evaluación de biodiversidad es importante para la comprensión de los patrones ecológicos de distribución de especies, para comprender el funcionamiento de los ecosistemas y para la gestión sobre el uso de los recursos y conservación. El objetivo de esta tesis fue recopilar y analizar la información histórica sobre riqueza específica de hidrozoos, poliquetos, crustáceos decápodos y equinodermos en el Atlántico Sudoccidental entre los 34° y 56° S a fin de sintetizar el estado de conocimiento actual, identificar patrones de distribución y poner a prueba la validez del esquema zoogeográfico establecido para el área de estudio. Se utilizaron análisis multivariados para analizar cambios en la riqueza y composición específica a través de gradientes latitudinales y batimétricos, así como también para reconocer y diferenciar las asociaciones existentes. La riqueza de especies registrada fue elevada para todos los grupos y en todos los casos un cierto número de especies fueron consideradas de validez o registro dudoso, producto de la discontinuidad espacio-temporal de sus registros. La riqueza en equinodermos y poliquetos se incrementa significativamente hacia latitudes mayores, lo cual podría estar relacionando con la alta diversidad de dichos grupos en la Región Antártica. Para los hidroides dicha correlación no fue significativa. Sin embargo, se identificaron áreas donde la riqueza presenta picos importantes que parecerían estar relacionados con la presencia de fondos y sustratos adecuados para su exitoso asentamiento. Los crustáceos decápodos no exhibieron ningún tipo de patrón en relación a la latitud. No obstante, otros autores han citado para este grupo un patrón de disminución en la riqueza de especies hacia latitudes altas. Se confirmó con los cuatro grupos estudiados, el esquema biogeográfico establecido para el área de estudio, distinguiendo dos conjuntos faunísticos bien diferenciados: Provincia Magallánica y Provincia Argentina. Los resultados indican que la Provincia Argentina incluiría al Golfo San Jorge (45° – 47° S). PhD Tesis (doctorado). Realizada en el INIDEP (Instituto Nacional de Investigación y Desarrollo Pesquero - Mar del Plata, Argentina) 2015-05-22T12:24:54Z 2015-05-22T12:24:54Z 2014 Thesis/Dissertation http://hdl.handle.net/1834/6803 es 231pp. Atlántico Sudoccidental Argentina Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales |