Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments
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...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211184 |
id |
ftvliz:oai:oma.vliz.be:211184 |
---|---|
record_format |
openpolar |
spelling |
ftvliz:oai:oma.vliz.be:211184 2023-05-15T13:33:16+02:00 Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments Verleyen, E. Hodgson, D.A. Leavitt, P.R. Sabbe, K. Vyverman, W. 2004 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211184 en eng info:eu-repo/semantics/altIdentifier/wos/000224979900006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211184 info:eu-repo/semantics/restrictedAccess iLimnol.+Oceanogr.+495i+1528-1539 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2004 ftvliz 2022-05-01T13:34:05Z 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 (r 2 = 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 (r 2 = 0.102, p = 0.111; r 2 = 0.223, p = 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 of both proxies in marine and freshwater environments permits more accurate interpretation of pigment and diatom data in paleo- and neoecological research and the partitioning of diatom production between habitats. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
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 (r 2 = 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 (r 2 = 0.102, p = 0.111; r 2 = 0.223, p = 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 of both proxies in marine and freshwater environments permits more accurate interpretation of pigment and diatom data in paleo- and neoecological research and the partitioning of diatom production between habitats. |
format |
Article in Journal/Newspaper |
author |
Verleyen, E. Hodgson, D.A. Leavitt, P.R. Sabbe, K. Vyverman, W. |
spellingShingle |
Verleyen, E. Hodgson, D.A. Leavitt, P.R. Sabbe, K. Vyverman, W. Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
author_facet |
Verleyen, E. Hodgson, D.A. Leavitt, P.R. Sabbe, K. Vyverman, W. |
author_sort |
Verleyen, E. |
title |
Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
title_short |
Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
title_full |
Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
title_fullStr |
Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
title_full_unstemmed |
Quantifying habitat-specific diatom production: A critical assessment using morphological and biogeochemical markers in Antarctic marine and lake sediments |
title_sort |
quantifying habitat-specific diatom production: a critical assessment using morphological and biogeochemical markers in antarctic marine and lake sediments |
publishDate |
2004 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211184 |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
Antarctic Larsemann Hills |
geographic_facet |
Antarctic Larsemann Hills |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
iLimnol.+Oceanogr.+495i+1528-1539 |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000224979900006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211184 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766040609294909440 |