Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition
[1] Measurements of d13C, d15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from three sediment cores in the Southern Ocean, one each from the Atlantic, Indian, and Pacific sectors. The site in the Scotia Sea (Atlantic sector) differed considerab...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.635.7731 2023-05-15T13:38:43+02:00 Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition H. Jacot Des R. Yam A. Shemesh The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.7731 http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.7731 http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf text ftciteseerx 2016-01-08T15:41:42Z [1] Measurements of d13C, d15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from three sediment cores in the Southern Ocean, one each from the Atlantic, Indian, and Pacific sectors. The site in the Scotia Sea (Atlantic sector) differed considerably from the other two sites by having markedly lower d13C, more variable d15N and C/N ratios, and a sedimentary diatom assemblage that was never dominated by Fragilariopsis kerguelensis. Although environmental parameters certainly have a strong impact on the isotope ratios, d13C is also correlated to the proportion of F. kerguelensis in the three cores investigated here (r2 = 0.8). Extreme values of d13C, d15N, and C/N at the Last Glacial Maximum were also related to the abundance of winter stages of Eucampia antarctica. These results suggest that diatom specific isotope records should be interpreted in conjunction with information on the species composition of the samples. Text Antarc* Antarctica Scotia Sea Southern Ocean Unknown Indian Pacific Scotia Sea Southern Ocean |
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Open Polar |
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Unknown |
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ftciteseerx |
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English |
description |
[1] Measurements of d13C, d15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from three sediment cores in the Southern Ocean, one each from the Atlantic, Indian, and Pacific sectors. The site in the Scotia Sea (Atlantic sector) differed considerably from the other two sites by having markedly lower d13C, more variable d15N and C/N ratios, and a sedimentary diatom assemblage that was never dominated by Fragilariopsis kerguelensis. Although environmental parameters certainly have a strong impact on the isotope ratios, d13C is also correlated to the proportion of F. kerguelensis in the three cores investigated here (r2 = 0.8). Extreme values of d13C, d15N, and C/N at the Last Glacial Maximum were also related to the abundance of winter stages of Eucampia antarctica. These results suggest that diatom specific isotope records should be interpreted in conjunction with information on the species composition of the samples. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
H. Jacot Des R. Yam A. Shemesh |
spellingShingle |
H. Jacot Des R. Yam A. Shemesh Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
author_facet |
H. Jacot Des R. Yam A. Shemesh |
author_sort |
H. Jacot Des |
title |
Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
title_short |
Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
title_full |
Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
title_fullStr |
Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
title_full_unstemmed |
Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition |
title_sort |
diatom d13c, d15n, and c/n since the last glacial maximum in the southern ocean: potential impact of species composition |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.7731 http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf |
geographic |
Indian Pacific Scotia Sea Southern Ocean |
geographic_facet |
Indian Pacific Scotia Sea Southern Ocean |
genre |
Antarc* Antarctica Scotia Sea Southern Ocean |
genre_facet |
Antarc* Antarctica Scotia Sea Southern Ocean |
op_source |
http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.7731 http://hal.univ-brest.fr/docs/00/46/71/38/PDF/Jacot_Des_Combes_08.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766110339516071936 |