Primary production in the Chukchi Sea with potential effects of freshwater content
The in situ primary production rates and various environmental variables were investigated in the Chukchi Sea during the RUSALCA expedition, which was conducted in 2012, to identify the current status of primary production. A 13 C– 15 N dual-tracer technique was used to measure the daily primary pro...
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ftdoajarticles:oai:doaj.org/article:3951c453756d47cf8dd3fcc22b964b11 2023-05-15T15:54:28+02:00 Primary production in the Chukchi Sea with potential effects of freshwater content M. S. Yun T. E. Whitledge D. Stockwell S. H. Son J. H. Lee J. W. Park D. B. Lee J. Park S. H. Lee 2016-02-01T00:00:00Z https://doi.org/10.5194/bg-13-737-2016 https://doaj.org/article/3951c453756d47cf8dd3fcc22b964b11 EN eng Copernicus Publications http://www.biogeosciences.net/13/737/2016/bg-13-737-2016.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-13-737-2016 https://doaj.org/article/3951c453756d47cf8dd3fcc22b964b11 Biogeosciences, Vol 13, Iss 3, Pp 737-749 (2016) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2016 ftdoajarticles https://doi.org/10.5194/bg-13-737-2016 2022-12-30T22:06:14Z The in situ primary production rates and various environmental variables were investigated in the Chukchi Sea during the RUSALCA expedition, which was conducted in 2012, to identify the current status of primary production. A 13 C– 15 N dual-tracer technique was used to measure the daily primary production rates, which ranged from 0.02 to 1.61 g C m −2 d −1 (mean ±SD = 0.42 ± 0.52 g C m −2 d −1 ). The primary production rates showed large regional differences, with the southern region (0.66 ± 0.62 g C m −2 d −1 ) producing approximately 5 times as much as the northern region (0.14 ± 0.10 g C m −2 d −1 ), which was primarily due to the differences in phytoplankton biomasses induced by regional nutrient conditions. The primary production rates in the Chukchi Sea were averaged using data acquired during the three different RUSALCA expeditions (2004, 2009, and 2012) as 0.33 g C m −2 d −1 (SD = 0.40 g C m −2 d −1 ), which was significantly lower than previously reported rates. In addition to strong seasonal and interannual variations in primary production, recent decreases in the concentrations of major inorganic nutrients and chlorophyll a could be among the reasons for the recent low primary production in the Chukchi Sea because the primary production is mainly affected by nutrient concentration and phytoplankton biomass. The nutrient inventory and primary production appear to be largely influenced by the freshwater content (FWC) variability in the region due to the significant relationships between FWC, nitrate inventory ( r = 0.54, p < 0.05), and primary production rates ( r = 0.56, p < 0.05). Moreover, we found highly significant relationships between the nutrient inventory and the primary production rates ( r = 0.75, p < 0.001). In conclusion, the primary production in the Chukchi Sea is primarily controlled by nutrient availability, which is strongly related to the FWC variability. Our results imply that the predicted increase in freshwater accumulation might cause a decrease in primary production by ... Article in Journal/Newspaper Chukchi Chukchi Sea RUSALCA Directory of Open Access Journals: DOAJ Articles Chukchi Sea Biogeosciences 13 3 737 749 |
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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 M. S. Yun T. E. Whitledge D. Stockwell S. H. Son J. H. Lee J. W. Park D. B. Lee J. Park S. H. Lee Primary production in the Chukchi Sea with potential effects of freshwater content |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The in situ primary production rates and various environmental variables were investigated in the Chukchi Sea during the RUSALCA expedition, which was conducted in 2012, to identify the current status of primary production. A 13 C– 15 N dual-tracer technique was used to measure the daily primary production rates, which ranged from 0.02 to 1.61 g C m −2 d −1 (mean ±SD = 0.42 ± 0.52 g C m −2 d −1 ). The primary production rates showed large regional differences, with the southern region (0.66 ± 0.62 g C m −2 d −1 ) producing approximately 5 times as much as the northern region (0.14 ± 0.10 g C m −2 d −1 ), which was primarily due to the differences in phytoplankton biomasses induced by regional nutrient conditions. The primary production rates in the Chukchi Sea were averaged using data acquired during the three different RUSALCA expeditions (2004, 2009, and 2012) as 0.33 g C m −2 d −1 (SD = 0.40 g C m −2 d −1 ), which was significantly lower than previously reported rates. In addition to strong seasonal and interannual variations in primary production, recent decreases in the concentrations of major inorganic nutrients and chlorophyll a could be among the reasons for the recent low primary production in the Chukchi Sea because the primary production is mainly affected by nutrient concentration and phytoplankton biomass. The nutrient inventory and primary production appear to be largely influenced by the freshwater content (FWC) variability in the region due to the significant relationships between FWC, nitrate inventory ( r = 0.54, p < 0.05), and primary production rates ( r = 0.56, p < 0.05). Moreover, we found highly significant relationships between the nutrient inventory and the primary production rates ( r = 0.75, p < 0.001). In conclusion, the primary production in the Chukchi Sea is primarily controlled by nutrient availability, which is strongly related to the FWC variability. Our results imply that the predicted increase in freshwater accumulation might cause a decrease in primary production by ... |
format |
Article in Journal/Newspaper |
author |
M. S. Yun T. E. Whitledge D. Stockwell S. H. Son J. H. Lee J. W. Park D. B. Lee J. Park S. H. Lee |
author_facet |
M. S. Yun T. E. Whitledge D. Stockwell S. H. Son J. H. Lee J. W. Park D. B. Lee J. Park S. H. Lee |
author_sort |
M. S. Yun |
title |
Primary production in the Chukchi Sea with potential effects of freshwater content |
title_short |
Primary production in the Chukchi Sea with potential effects of freshwater content |
title_full |
Primary production in the Chukchi Sea with potential effects of freshwater content |
title_fullStr |
Primary production in the Chukchi Sea with potential effects of freshwater content |
title_full_unstemmed |
Primary production in the Chukchi Sea with potential effects of freshwater content |
title_sort |
primary production in the chukchi sea with potential effects of freshwater content |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/bg-13-737-2016 https://doaj.org/article/3951c453756d47cf8dd3fcc22b964b11 |
geographic |
Chukchi Sea |
geographic_facet |
Chukchi Sea |
genre |
Chukchi Chukchi Sea RUSALCA |
genre_facet |
Chukchi Chukchi Sea RUSALCA |
op_source |
Biogeosciences, Vol 13, Iss 3, Pp 737-749 (2016) |
op_relation |
http://www.biogeosciences.net/13/737/2016/bg-13-737-2016.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-13-737-2016 https://doaj.org/article/3951c453756d47cf8dd3fcc22b964b11 |
op_doi |
https://doi.org/10.5194/bg-13-737-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
3 |
container_start_page |
737 |
op_container_end_page |
749 |
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1766389666916859904 |