Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns?
9 pages, 4 figures, 4 tables Biochemical characteristics of seafloor sediment off Austasen in the southeastern Weddell Sea were assayed in samples recovered in the early autumn and late spring of 2000 and 2003, respectively. Sediment was separated in the grain-size fractions >200 μm and <200 μ...
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Online Access: | http://hdl.handle.net/10261/49094 https://doi.org/10.1007/s00300-011-0973-6 |
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ftcsic:oai:digital.csic.es:10261/49094 2024-02-11T09:56:23+01:00 Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? Isla, Enrique Gerdes, Dieter Rossi, Sergio Fiorillo, Ida Sañé, Elisabet Gili, Josep Maria Arntz, Wolf E. 2011-08 http://hdl.handle.net/10261/49094 https://doi.org/10.1007/s00300-011-0973-6 en eng Springer https://doi.org/10.1007/s00300-011-0973-6 Polar Biology 34(8): 1125-1133 (2011) 0722-4060 http://hdl.handle.net/10261/49094 doi:10.1007/s00300-011-0973-6 1432-2056 none Antarctica Lipids Sediment geochemistry Weddell Sea Continental shelf Proteins artículo http://purl.org/coar/resource_type/c_6501 2011 ftcsic https://doi.org/10.1007/s00300-011-0973-6 2024-01-16T09:37:32Z 9 pages, 4 figures, 4 tables Biochemical characteristics of seafloor sediment off Austasen in the southeastern Weddell Sea were assayed in samples recovered in the early autumn and late spring of 2000 and 2003, respectively. Sediment was separated in the grain-size fractions >200 μm and <200 μm to distinguish biochemical characteristics in the fraction available for benthic suspension feeders (<200 μm). In the bulk sediment, the lipid (LPD) and carbohydrate (CHO) contents were significantly different between seasons with higher LPD content in the early autumn and higher CHO content in the late spring. In the grain-size fractions <200 μm, the LPD and protein (PRT) contents were significantly higher in the early autumn meaning that in this season the fraction available for benthic suspension feeders presented higher nutritive value. The relatively higher CHO concentrations observed in each fraction in the late spring were attributed to refractory matter, whereas the higher PRT and LPD concentrations found during the early autumn were associated with planktonic material settled after the summer phytoplankton bloom. Our results suggest that there is seasonal variation in the composition of organic matter in the sediment, with better nutritive quality in the early autumn, especially in the grain-size fraction available for benthic suspension feeders. These variations also suggest that the benthic community exploits the fresh organic matter accumulated after the summer throughout the Antarctic dark months leaving the sediment almost exhaust of LPD and with higher CHO contents, presumably of refractory nature, at the onset of the seasonal phytoplankton bloom of the following year The authors wish to thank the Captain and crew of the RV “Polarstern” for their eYcient help during the Weld work. The present work was partially funded by the Spanish Ministry of Education and Science through the project FILANT (REN2003-04236). The original manuscript improved with the comments of C.R. Smith and one anonymous ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Polar Biology Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic The Antarctic Weddell Sea Weddell Polar Biology 34 8 1125 1133 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Antarctica Lipids Sediment geochemistry Weddell Sea Continental shelf Proteins |
spellingShingle |
Antarctica Lipids Sediment geochemistry Weddell Sea Continental shelf Proteins Isla, Enrique Gerdes, Dieter Rossi, Sergio Fiorillo, Ida Sañé, Elisabet Gili, Josep Maria Arntz, Wolf E. Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
topic_facet |
Antarctica Lipids Sediment geochemistry Weddell Sea Continental shelf Proteins |
description |
9 pages, 4 figures, 4 tables Biochemical characteristics of seafloor sediment off Austasen in the southeastern Weddell Sea were assayed in samples recovered in the early autumn and late spring of 2000 and 2003, respectively. Sediment was separated in the grain-size fractions >200 μm and <200 μm to distinguish biochemical characteristics in the fraction available for benthic suspension feeders (<200 μm). In the bulk sediment, the lipid (LPD) and carbohydrate (CHO) contents were significantly different between seasons with higher LPD content in the early autumn and higher CHO content in the late spring. In the grain-size fractions <200 μm, the LPD and protein (PRT) contents were significantly higher in the early autumn meaning that in this season the fraction available for benthic suspension feeders presented higher nutritive value. The relatively higher CHO concentrations observed in each fraction in the late spring were attributed to refractory matter, whereas the higher PRT and LPD concentrations found during the early autumn were associated with planktonic material settled after the summer phytoplankton bloom. Our results suggest that there is seasonal variation in the composition of organic matter in the sediment, with better nutritive quality in the early autumn, especially in the grain-size fraction available for benthic suspension feeders. These variations also suggest that the benthic community exploits the fresh organic matter accumulated after the summer throughout the Antarctic dark months leaving the sediment almost exhaust of LPD and with higher CHO contents, presumably of refractory nature, at the onset of the seasonal phytoplankton bloom of the following year The authors wish to thank the Captain and crew of the RV “Polarstern” for their eYcient help during the Weld work. The present work was partially funded by the Spanish Ministry of Education and Science through the project FILANT (REN2003-04236). The original manuscript improved with the comments of C.R. Smith and one anonymous ... |
format |
Article in Journal/Newspaper |
author |
Isla, Enrique Gerdes, Dieter Rossi, Sergio Fiorillo, Ida Sañé, Elisabet Gili, Josep Maria Arntz, Wolf E. |
author_facet |
Isla, Enrique Gerdes, Dieter Rossi, Sergio Fiorillo, Ida Sañé, Elisabet Gili, Josep Maria Arntz, Wolf E. |
author_sort |
Isla, Enrique |
title |
Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
title_short |
Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
title_full |
Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
title_fullStr |
Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
title_full_unstemmed |
Biochemical characteristics of surface sediments on the eastern Weddell Sea continental shelf, Antarctica: is there any evidence of seasonal patterns? |
title_sort |
biochemical characteristics of surface sediments on the eastern weddell sea continental shelf, antarctica: is there any evidence of seasonal patterns? |
publisher |
Springer |
publishDate |
2011 |
url |
http://hdl.handle.net/10261/49094 https://doi.org/10.1007/s00300-011-0973-6 |
geographic |
Antarctic The Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctica Polar Biology Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Polar Biology Weddell Sea |
op_relation |
https://doi.org/10.1007/s00300-011-0973-6 Polar Biology 34(8): 1125-1133 (2011) 0722-4060 http://hdl.handle.net/10261/49094 doi:10.1007/s00300-011-0973-6 1432-2056 |
op_rights |
none |
op_doi |
https://doi.org/10.1007/s00300-011-0973-6 |
container_title |
Polar Biology |
container_volume |
34 |
container_issue |
8 |
container_start_page |
1125 |
op_container_end_page |
1133 |
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1790602729131868160 |