Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters
A large spatial scale study of the diatom species inhabiting waters from the subantarctic (Argentine shelf) to antarctic was made for the first time in order to understand the relationships between these two regions with regard to the fluctuations in diatom abundances in relation with environmental...
Main Authors: | , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2011
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.818059 https://doi.org/10.1594/PANGAEA.818059 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818059 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818059 2023-05-15T13:42:11+02:00 Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters Olguín, Héctor F Alder, Viviana A MEDIAN LATITUDE: -59.603931 * MEDIAN LONGITUDE: -46.825023 * SOUTH-BOUND LATITUDE: -71.823830 * WEST-BOUND LONGITUDE: -63.660000 * NORTH-BOUND LATITUDE: -41.040000 * EAST-BOUND LONGITUDE: -13.718000 * DATE/TIME START: 2002-01-31T00:00:00 * DATE/TIME END: 2002-03-04T00:00:00 2011-08-15 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.818059 https://doi.org/10.1594/PANGAEA.818059 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.818059 https://doi.org/10.1594/PANGAEA.818059 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Olguín, Héctor F; Alder, Viviana A (2011): Species composition and biogeography of diatoms in antarctic and subantarctic (Argentine shelf) waters (37–76°S). Deep Sea Research Part II: Topical Studies in Oceanography, 58(1-2), 139-152, https://doi.org/10.1016/j.dsr2.2010.09.031 International Polar Year (2007-2008) IPY Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.818059 https://doi.org/10.1016/j.dsr2.2010.09.031 2023-01-20T07:33:06Z A large spatial scale study of the diatom species inhabiting waters from the subantarctic (Argentine shelf) to antarctic was made for the first time in order to understand the relationships between these two regions with regard to the fluctuations in diatom abundances in relation with environmental features, their floristic associations and the effect of the Polar Front as a biogeographic barrier. Species-specific diatom abundance, nutrient and chlorophyll-a concentration were assessed from 64 subsurface oceanographic stations carried out during the austral summer 2002, a period characterized by an anomalous sea-ice coverage corresponding to a ''warm year". Significant relationships of both diatom density and biomass with chlorophyll-a (positive) and water temperature (negative) were found for the study area as a whole. Within the Subantarctic region, diatom density and biomass values were more uniform and significantly (in average: 35 and 11 times) lower than those of the Antarctic region, and did not correlate with chlorophyll-a. In antarctic waters, instead, biomass was directly related with chlorophyll-a, thus confirming the important contribution of diatoms to the Antarctic phytoplanktonic stock. A total of 167 taxa were recorded for the entire study area, with Chaetoceros and Thalassiosira being the best represented genera. Species richness was maximum in subantarctic waters (46; Argentine shelf) and minimum in the Antarctic region (21; Antarctic Peninsula), and showed a significant decrease with latitude. Floristic associations were examined both qualitatively (Jaccard Index) and quantitatively (correlation) by cluster analyses and results allowed differentiating a similar number of associations (12 vs. 13, respectively) and two main groups of stations. In the Drake Passage, the former revealed that the main floristic change was found at the Polar Front, while the latter reflected the Southern ACC Front as a main boundary, and yielded a higher number of isolated sites, most of them located next to ... Dataset Antarc* Antarctic Antarctic Peninsula antartic* Drake Passage International Polar Year IPY Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Antarctic Peninsula Austral Drake Passage Argentine ENVELOPE(-63.660000,-13.718000,-41.040000,-71.823830) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Olguín, Héctor F Alder, Viviana A Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
A large spatial scale study of the diatom species inhabiting waters from the subantarctic (Argentine shelf) to antarctic was made for the first time in order to understand the relationships between these two regions with regard to the fluctuations in diatom abundances in relation with environmental features, their floristic associations and the effect of the Polar Front as a biogeographic barrier. Species-specific diatom abundance, nutrient and chlorophyll-a concentration were assessed from 64 subsurface oceanographic stations carried out during the austral summer 2002, a period characterized by an anomalous sea-ice coverage corresponding to a ''warm year". Significant relationships of both diatom density and biomass with chlorophyll-a (positive) and water temperature (negative) were found for the study area as a whole. Within the Subantarctic region, diatom density and biomass values were more uniform and significantly (in average: 35 and 11 times) lower than those of the Antarctic region, and did not correlate with chlorophyll-a. In antarctic waters, instead, biomass was directly related with chlorophyll-a, thus confirming the important contribution of diatoms to the Antarctic phytoplanktonic stock. A total of 167 taxa were recorded for the entire study area, with Chaetoceros and Thalassiosira being the best represented genera. Species richness was maximum in subantarctic waters (46; Argentine shelf) and minimum in the Antarctic region (21; Antarctic Peninsula), and showed a significant decrease with latitude. Floristic associations were examined both qualitatively (Jaccard Index) and quantitatively (correlation) by cluster analyses and results allowed differentiating a similar number of associations (12 vs. 13, respectively) and two main groups of stations. In the Drake Passage, the former revealed that the main floristic change was found at the Polar Front, while the latter reflected the Southern ACC Front as a main boundary, and yielded a higher number of isolated sites, most of them located next to ... |
format |
Dataset |
author |
Olguín, Héctor F Alder, Viviana A |
author_facet |
Olguín, Héctor F Alder, Viviana A |
author_sort |
Olguín, Héctor F |
title |
Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
title_short |
Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
title_full |
Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
title_fullStr |
Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
title_full_unstemmed |
Abiotic characteristics and diatom abundance and biomass in different sectors of the Argentinien Shelf and antartic waters |
title_sort |
abiotic characteristics and diatom abundance and biomass in different sectors of the argentinien shelf and antartic waters |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.818059 https://doi.org/10.1594/PANGAEA.818059 |
op_coverage |
MEDIAN LATITUDE: -59.603931 * MEDIAN LONGITUDE: -46.825023 * SOUTH-BOUND LATITUDE: -71.823830 * WEST-BOUND LONGITUDE: -63.660000 * NORTH-BOUND LATITUDE: -41.040000 * EAST-BOUND LONGITUDE: -13.718000 * DATE/TIME START: 2002-01-31T00:00:00 * DATE/TIME END: 2002-03-04T00:00:00 |
long_lat |
ENVELOPE(-63.660000,-13.718000,-41.040000,-71.823830) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral Drake Passage Argentine |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral Drake Passage Argentine |
genre |
Antarc* Antarctic Antarctic Peninsula antartic* Drake Passage International Polar Year IPY Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula antartic* Drake Passage International Polar Year IPY Sea ice |
op_source |
Supplement to: Olguín, Héctor F; Alder, Viviana A (2011): Species composition and biogeography of diatoms in antarctic and subantarctic (Argentine shelf) waters (37–76°S). Deep Sea Research Part II: Topical Studies in Oceanography, 58(1-2), 139-152, https://doi.org/10.1016/j.dsr2.2010.09.031 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.818059 https://doi.org/10.1594/PANGAEA.818059 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.818059 https://doi.org/10.1016/j.dsr2.2010.09.031 |
_version_ |
1766164529943674880 |