Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer
International audience The present paper describes latitudinal and vertical changes in the composition, abundance and diversity of copepods in the Indian sector of the Antarctic Ocean, during the end of austral summer along a transect on 66 degrees 30'E between 43 and 62 degrees S, within three...
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ftsorbonneuniv:oai:HAL:hal-03479828v1 2024-06-23T07:47:11+00:00 Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer Errhif, A Razouls, C Mayzaud, P Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 1997 https://hal.science/hal-03479828 https://doi.org/10.1007/s003000050136 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s003000050136 hal-03479828 https://hal.science/hal-03479828 doi:10.1007/s003000050136 ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-03479828 Polar Biology, 1997, 17 (5), pp.418-430. ⟨10.1007/s003000050136⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1997 ftsorbonneuniv https://doi.org/10.1007/s003000050136 2024-05-30T23:46:44Z International audience The present paper describes latitudinal and vertical changes in the composition, abundance and diversity of copepods in the Indian sector of the Antarctic Ocean, during the end of austral summer along a transect on 66 degrees 30'E between 43 and 62 degrees S, within three layers (600-0, 200-0, 100-0 m). Highest copepod densities were noted in the central part of the transect, between the Antarctic Divergence and the Antarctic Convergence, with a maximum in the Antarctic Divergence zone, particularly in the upper levels of the water column. A total number of 80 copepod species were identified over the entire survey area. The south end and the central part of the transect comprised a small number of species. North of the Antarctic Convergence, this number increased markedly with the progressive disappearence of those species characteristic of Antarctic waters and their replacement by temperate and subtropical species. Generally, small copepods, particularly Oithona similis, Oithona frigida and Ctenocalanus citer, dominated in numbers in both Antarctic and sub-Antarctic areas. The contribution of large species to total copepod numbers was much lower, with Calanus simillimus in the central part of the transect, Pleuromamma borealis in the subtropical zone and Calanus propinquus in the southern part. Correspondence analysis showed a marked latitudinal gradient in population structure with four groups of samples and species corresponding to four latitudinal zones. Community structure (species richness, relative dominance index, evenness, Shannon species diversity index) and species abundance patterns (as rank-frequency diagrams) suggested that the maturity and species richness increased gradually from south to north. A low diversity index and evenness were observed in the area of the Antarctic Divergence, whereas the convergence zone showed high diversity and evenness. Conversely, the frontal zone showed high diversity and evenness. Distribution appeared unrelated to chlorophyll concentrations ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Polar Biology Copepods HAL Sorbonne Université Antarctic The Antarctic Austral Indian Antarctic Ocean Polar Biology 17 5 418 430 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Errhif, A Razouls, C Mayzaud, P Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The present paper describes latitudinal and vertical changes in the composition, abundance and diversity of copepods in the Indian sector of the Antarctic Ocean, during the end of austral summer along a transect on 66 degrees 30'E between 43 and 62 degrees S, within three layers (600-0, 200-0, 100-0 m). Highest copepod densities were noted in the central part of the transect, between the Antarctic Divergence and the Antarctic Convergence, with a maximum in the Antarctic Divergence zone, particularly in the upper levels of the water column. A total number of 80 copepod species were identified over the entire survey area. The south end and the central part of the transect comprised a small number of species. North of the Antarctic Convergence, this number increased markedly with the progressive disappearence of those species characteristic of Antarctic waters and their replacement by temperate and subtropical species. Generally, small copepods, particularly Oithona similis, Oithona frigida and Ctenocalanus citer, dominated in numbers in both Antarctic and sub-Antarctic areas. The contribution of large species to total copepod numbers was much lower, with Calanus simillimus in the central part of the transect, Pleuromamma borealis in the subtropical zone and Calanus propinquus in the southern part. Correspondence analysis showed a marked latitudinal gradient in population structure with four groups of samples and species corresponding to four latitudinal zones. Community structure (species richness, relative dominance index, evenness, Shannon species diversity index) and species abundance patterns (as rank-frequency diagrams) suggested that the maturity and species richness increased gradually from south to north. A low diversity index and evenness were observed in the area of the Antarctic Divergence, whereas the convergence zone showed high diversity and evenness. Conversely, the frontal zone showed high diversity and evenness. Distribution appeared unrelated to chlorophyll concentrations ... |
author2 |
Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Errhif, A Razouls, C Mayzaud, P |
author_facet |
Errhif, A Razouls, C Mayzaud, P |
author_sort |
Errhif, A |
title |
Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
title_short |
Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
title_full |
Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
title_fullStr |
Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
title_full_unstemmed |
Composition and community structure of pelagic copepods in the Indian sector of the Antarctic Ocean during the end of the austral summer |
title_sort |
composition and community structure of pelagic copepods in the indian sector of the antarctic ocean during the end of the austral summer |
publisher |
HAL CCSD |
publishDate |
1997 |
url |
https://hal.science/hal-03479828 https://doi.org/10.1007/s003000050136 |
geographic |
Antarctic The Antarctic Austral Indian Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Austral Indian Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean Polar Biology Copepods |
genre_facet |
Antarc* Antarctic Antarctic Ocean Polar Biology Copepods |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-03479828 Polar Biology, 1997, 17 (5), pp.418-430. ⟨10.1007/s003000050136⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s003000050136 hal-03479828 https://hal.science/hal-03479828 doi:10.1007/s003000050136 |
op_doi |
https://doi.org/10.1007/s003000050136 |
container_title |
Polar Biology |
container_volume |
17 |
container_issue |
5 |
container_start_page |
418 |
op_container_end_page |
430 |
_version_ |
1802651270718160896 |