Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study
The West Antarctic Peninsula (WAP) exhibits strong spatial and temporal oceanographic variability, resulting in highly heterogeneous biological productivity. Calcifying organisms that live in the waters off the WAP respond to temporal and spatial variations in ocean temperature and chemistry. These...
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ftdoajarticles:oai:doaj.org/article:30627e7279a84f5682f83722f1865166 2023-05-15T14:03:49+02:00 Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study A. Mikis K. R. Hendry J. Pike D. N. Schmidt K. M. Edgar V. Peck F. J. C. Peeters M. J. Leng M. P. Meredith C. L. Todd S. Stammerjohn H. Ducklow 2019-08-01T00:00:00Z https://doi.org/10.5194/bg-16-3267-2019 https://doaj.org/article/30627e7279a84f5682f83722f1865166 EN eng Copernicus Publications https://www.biogeosciences.net/16/3267/2019/bg-16-3267-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-3267-2019 1726-4170 1726-4189 https://doaj.org/article/30627e7279a84f5682f83722f1865166 Biogeosciences, Vol 16, Pp 3267-3282 (2019) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/bg-16-3267-2019 2022-12-31T12:29:19Z The West Antarctic Peninsula (WAP) exhibits strong spatial and temporal oceanographic variability, resulting in highly heterogeneous biological productivity. Calcifying organisms that live in the waters off the WAP respond to temporal and spatial variations in ocean temperature and chemistry. These marine calcifiers are potentially threatened by regional climate change with waters already naturally close to carbonate undersaturation. Future projections of carbonate production in the Southern Ocean are challenging due to the lack of historical data collection and complex, decadal climate variability. Here we present a 6-year-long record of the shell fluxes, morphology and stable isotope variability of the polar planktic foraminifera Neogloboquadrina pachyderma (sensu stricto) from near Palmer Station, Antarctica. This species is fundamental to Southern Ocean planktic carbonate production as it is one of the very few planktic foraminifer species adapted to the marine polar environments. We use these new data to obtain insights into its ecology and to derive a robust assessment of the response of this polar species to environmental change. Morphology and stable isotope composition reveal the presence of different growth stages within this tightly defined species. Inter- and intra-annual variability of foraminiferal flux and size is evident and driven by a combination of environmental forcing parameters, most importantly food availability, temperature and sea ice duration and extent. Foraminiferal growth occurs throughout the austral year and is influenced by environmental change, a large portion of which is driven by the Southern Annular Mode and El Niño–Southern Oscillation. A distinct seasonal production is observed, with the highest shell fluxes during the warmest and most productive months of the year. The sensitivity of calcifying foraminifera to environmental variability in this region, from weeks to decades, has implications both for their response to future climatic change and for their use as palaeoclimate ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Neogloboquadrina pachyderma Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Antarctic Peninsula Austral Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Biogeosciences 16 16 3267 3282 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 A. Mikis K. R. Hendry J. Pike D. N. Schmidt K. M. Edgar V. Peck F. J. C. Peeters M. J. Leng M. P. Meredith C. L. Todd S. Stammerjohn H. Ducklow Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The West Antarctic Peninsula (WAP) exhibits strong spatial and temporal oceanographic variability, resulting in highly heterogeneous biological productivity. Calcifying organisms that live in the waters off the WAP respond to temporal and spatial variations in ocean temperature and chemistry. These marine calcifiers are potentially threatened by regional climate change with waters already naturally close to carbonate undersaturation. Future projections of carbonate production in the Southern Ocean are challenging due to the lack of historical data collection and complex, decadal climate variability. Here we present a 6-year-long record of the shell fluxes, morphology and stable isotope variability of the polar planktic foraminifera Neogloboquadrina pachyderma (sensu stricto) from near Palmer Station, Antarctica. This species is fundamental to Southern Ocean planktic carbonate production as it is one of the very few planktic foraminifer species adapted to the marine polar environments. We use these new data to obtain insights into its ecology and to derive a robust assessment of the response of this polar species to environmental change. Morphology and stable isotope composition reveal the presence of different growth stages within this tightly defined species. Inter- and intra-annual variability of foraminiferal flux and size is evident and driven by a combination of environmental forcing parameters, most importantly food availability, temperature and sea ice duration and extent. Foraminiferal growth occurs throughout the austral year and is influenced by environmental change, a large portion of which is driven by the Southern Annular Mode and El Niño–Southern Oscillation. A distinct seasonal production is observed, with the highest shell fluxes during the warmest and most productive months of the year. The sensitivity of calcifying foraminifera to environmental variability in this region, from weeks to decades, has implications both for their response to future climatic change and for their use as palaeoclimate ... |
format |
Article in Journal/Newspaper |
author |
A. Mikis K. R. Hendry J. Pike D. N. Schmidt K. M. Edgar V. Peck F. J. C. Peeters M. J. Leng M. P. Meredith C. L. Todd S. Stammerjohn H. Ducklow |
author_facet |
A. Mikis K. R. Hendry J. Pike D. N. Schmidt K. M. Edgar V. Peck F. J. C. Peeters M. J. Leng M. P. Meredith C. L. Todd S. Stammerjohn H. Ducklow |
author_sort |
A. Mikis |
title |
Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
title_short |
Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
title_full |
Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
title_fullStr |
Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
title_full_unstemmed |
Temporal variability in foraminiferal morphology and geochemistry at the West Antarctic Peninsula: a sediment trap study |
title_sort |
temporal variability in foraminiferal morphology and geochemistry at the west antarctic peninsula: a sediment trap study |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/bg-16-3267-2019 https://doaj.org/article/30627e7279a84f5682f83722f1865166 |
long_lat |
ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) |
geographic |
Antarctic Southern Ocean Antarctic Peninsula Austral Palmer Station Palmer-Station |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula Austral Palmer Station Palmer-Station |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Neogloboquadrina pachyderma Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Neogloboquadrina pachyderma Sea ice Southern Ocean |
op_source |
Biogeosciences, Vol 16, Pp 3267-3282 (2019) |
op_relation |
https://www.biogeosciences.net/16/3267/2019/bg-16-3267-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-3267-2019 1726-4170 1726-4189 https://doaj.org/article/30627e7279a84f5682f83722f1865166 |
op_doi |
https://doi.org/10.5194/bg-16-3267-2019 |
container_title |
Biogeosciences |
container_volume |
16 |
container_issue |
16 |
container_start_page |
3267 |
op_container_end_page |
3282 |
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1766274672999006208 |