Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis
Polar systems are undersampled due to the difficulty of sampling remote and challenging environments; however, these systems are critical components of global biogeochemical cycles. Measurements on primary productivity in specific areas can quantify the input of organic matter to food webs and so ar...
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ftdoajarticles:oai:doaj.org/article:89f1b58125f540119bdb721291ff03ab 2023-05-15T13:53:32+02:00 Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis W. O. Smith Jr. 2022-06-01T00:00:00Z https://doi.org/10.5194/essd-14-2737-2022 https://doaj.org/article/89f1b58125f540119bdb721291ff03ab EN eng Copernicus Publications https://essd.copernicus.org/articles/14/2737/2022/essd-14-2737-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-2737-2022 1866-3508 1866-3516 https://doaj.org/article/89f1b58125f540119bdb721291ff03ab Earth System Science Data, Vol 14, Pp 2737-2747 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/essd-14-2737-2022 2022-12-30T23:15:14Z Polar systems are undersampled due to the difficulty of sampling remote and challenging environments; however, these systems are critical components of global biogeochemical cycles. Measurements on primary productivity in specific areas can quantify the input of organic matter to food webs and so are of critical ecological importance as well. However, long-term measurements using the same methodology are available only for a few polar systems. Primary productivity measurements using 14 C-uptake incubations from the Ross Sea, Antarctica, are synthesized, along with chlorophyll concentrations at the same depths and locations. A total of 19 independent cruises were completed and 449 stations occupied where measurements of primary productivity (each with seven depths) were completed. The incubations used the same basic simulated in situ methodology for all. Integrated water column productivity for all stations averaged 1.10 ± 1.20 g C m −2 d −1 , and the maximum was 13.1 g C m −2 d −1 . Annual productivity calculated from the means throughout the growing season equalled 146 g C m −2 yr −1 . The mean chlorophyll concentration in the euphotic zone (the 1 % irradiance level) was 2.85 ± 2.68 mg m −3 (maximum observed concentration was 19.1 mg m −3 ). Maximum photosynthetic rates above the 30 % isolume (normalized to chlorophyll) averaged 0.98 ± 0.71 mg C (mg chl) −1 h −1 , similar to the maximum rate found in photosynthesis–irradiance measurements. Productivity measurements are consistent with the temporal patterns of biomass found previously, with biomass and productivity peaking in late December; mixed layers were at a minimum at this time as well. Estimates of plankton composition also suggest that pre-January productivity was largely driven by the haptophyte Phaeocystis antarctica and summer productivity by diatoms. The data set ( https://doi.org/10.26008/1912/bco-dmo.863815.2 , Smith, 2021) will be useful for a comparison to other Antarctic regions and provide a basis for refined bio-optical models of regional ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Directory of Open Access Journals: DOAJ Articles Antarctic Ross Sea Earth System Science Data 14 6 2737 2747 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 W. O. Smith Jr. Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Polar systems are undersampled due to the difficulty of sampling remote and challenging environments; however, these systems are critical components of global biogeochemical cycles. Measurements on primary productivity in specific areas can quantify the input of organic matter to food webs and so are of critical ecological importance as well. However, long-term measurements using the same methodology are available only for a few polar systems. Primary productivity measurements using 14 C-uptake incubations from the Ross Sea, Antarctica, are synthesized, along with chlorophyll concentrations at the same depths and locations. A total of 19 independent cruises were completed and 449 stations occupied where measurements of primary productivity (each with seven depths) were completed. The incubations used the same basic simulated in situ methodology for all. Integrated water column productivity for all stations averaged 1.10 ± 1.20 g C m −2 d −1 , and the maximum was 13.1 g C m −2 d −1 . Annual productivity calculated from the means throughout the growing season equalled 146 g C m −2 yr −1 . The mean chlorophyll concentration in the euphotic zone (the 1 % irradiance level) was 2.85 ± 2.68 mg m −3 (maximum observed concentration was 19.1 mg m −3 ). Maximum photosynthetic rates above the 30 % isolume (normalized to chlorophyll) averaged 0.98 ± 0.71 mg C (mg chl) −1 h −1 , similar to the maximum rate found in photosynthesis–irradiance measurements. Productivity measurements are consistent with the temporal patterns of biomass found previously, with biomass and productivity peaking in late December; mixed layers were at a minimum at this time as well. Estimates of plankton composition also suggest that pre-January productivity was largely driven by the haptophyte Phaeocystis antarctica and summer productivity by diatoms. The data set ( https://doi.org/10.26008/1912/bco-dmo.863815.2 , Smith, 2021) will be useful for a comparison to other Antarctic regions and provide a basis for refined bio-optical models of regional ... |
format |
Article in Journal/Newspaper |
author |
W. O. Smith Jr. |
author_facet |
W. O. Smith Jr. |
author_sort |
W. O. Smith Jr. |
title |
Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
title_short |
Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
title_full |
Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
title_fullStr |
Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
title_full_unstemmed |
Primary productivity measurements in the Ross Sea, Antarctica: a regional synthesis |
title_sort |
primary productivity measurements in the ross sea, antarctica: a regional synthesis |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/essd-14-2737-2022 https://doaj.org/article/89f1b58125f540119bdb721291ff03ab |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_source |
Earth System Science Data, Vol 14, Pp 2737-2747 (2022) |
op_relation |
https://essd.copernicus.org/articles/14/2737/2022/essd-14-2737-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-2737-2022 1866-3508 1866-3516 https://doaj.org/article/89f1b58125f540119bdb721291ff03ab |
op_doi |
https://doi.org/10.5194/essd-14-2737-2022 |
container_title |
Earth System Science Data |
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14 |
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6 |
container_start_page |
2737 |
op_container_end_page |
2747 |
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1766258702416871424 |