Great Britain
Reconstructions of historical primary production, and of the algal groups and habitats that contribute to it, are fundamental in studies of climate and environmental change in both marine and freshwater environments. The aims of this study were to critically evaluate morphological and biogeochemical...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.589.6597 2023-05-15T13:55:08+02:00 Great Britain Elie Verleyen Dominic A. Hodgson Peter R. Leavitt Koen Sabbe Wim Vyverman The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.589.6597 http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.589.6597 http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf text ftciteseerx 2016-01-08T13:25:12Z Reconstructions of historical primary production, and of the algal groups and habitats that contribute to it, are fundamental in studies of climate and environmental change in both marine and freshwater environments. The aims of this study were to critically evaluate morphological and biogeochemical markers of diatom production by direct comparison of diatom marker pigments with absolute diatom biovolume and to partition diatom production between the main habitats (plankton, sea ice, and benthos). Sediments in two cores from the Larsemann Hills, Antarctica, spanning the last 10,000 yr, were analyzed for siliceous microfossils by microscopy and for fossil pigments by high-performance liquid chromatography. Diatom pigments (diadinoxanthin, diatoxanthin, fucoxanthin) were highly correlated (r2 5 0.557 and 0.358, p, 0.0001) with diatom biovolume in the marine intervals of both cores, but only weakly correlated in the lacustrine sections (r2 5 0.102, p 5 0.111; r2 5 0.223, p 5 0.001, after correction for temporal autocorrelation), possibly because of frustule dissolution and selective degradation of diadinoxanthin and diatoxanthin. In contrast, fucoxanthin was better preserved. By combining both microfossil and pigment proxies, we obtained a first estimate of diatom production in specific habitats (benthic and planktonic). Benthic diatom production was greatest in the lacustrine core sections, when benthic microbial mats dominated the flora, whereas diatoms were associated mainly with the water column and sea ice during the marine intervals. The combination Text Antarc* Antarctica Sea ice Unknown Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) |
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ftciteseerx |
language |
English |
description |
Reconstructions of historical primary production, and of the algal groups and habitats that contribute to it, are fundamental in studies of climate and environmental change in both marine and freshwater environments. The aims of this study were to critically evaluate morphological and biogeochemical markers of diatom production by direct comparison of diatom marker pigments with absolute diatom biovolume and to partition diatom production between the main habitats (plankton, sea ice, and benthos). Sediments in two cores from the Larsemann Hills, Antarctica, spanning the last 10,000 yr, were analyzed for siliceous microfossils by microscopy and for fossil pigments by high-performance liquid chromatography. Diatom pigments (diadinoxanthin, diatoxanthin, fucoxanthin) were highly correlated (r2 5 0.557 and 0.358, p, 0.0001) with diatom biovolume in the marine intervals of both cores, but only weakly correlated in the lacustrine sections (r2 5 0.102, p 5 0.111; r2 5 0.223, p 5 0.001, after correction for temporal autocorrelation), possibly because of frustule dissolution and selective degradation of diadinoxanthin and diatoxanthin. In contrast, fucoxanthin was better preserved. By combining both microfossil and pigment proxies, we obtained a first estimate of diatom production in specific habitats (benthic and planktonic). Benthic diatom production was greatest in the lacustrine core sections, when benthic microbial mats dominated the flora, whereas diatoms were associated mainly with the water column and sea ice during the marine intervals. The combination |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Elie Verleyen Dominic A. Hodgson Peter R. Leavitt Koen Sabbe Wim Vyverman |
spellingShingle |
Elie Verleyen Dominic A. Hodgson Peter R. Leavitt Koen Sabbe Wim Vyverman Great Britain |
author_facet |
Elie Verleyen Dominic A. Hodgson Peter R. Leavitt Koen Sabbe Wim Vyverman |
author_sort |
Elie Verleyen |
title |
Great Britain |
title_short |
Great Britain |
title_full |
Great Britain |
title_fullStr |
Great Britain |
title_full_unstemmed |
Great Britain |
title_sort |
great britain |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.589.6597 http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
Larsemann Hills |
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Larsemann Hills |
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Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_source |
http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.589.6597 http://www.aslo.org/lo/toc/vol_49/issue_5/1528.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766261402867073024 |