Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific
The subarctic Pacific is one of the major high-nitrate, low-chlorophyll (HNLC) regions where marine productivity is greatly limited by the supply of iron (Fe) in the region. There is a distinct seasonal difference in the chlorophyll concentrations of the east and west sides of the subarctic Pacific...
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crfrontiers:10.3389/fmars.2021.735826 2024-04-21T08:12:24+00:00 Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific Zhang, Hao-Ran Wang, Yuntao Xiu, Peng Qi, Yiquan Chai, Fei 2021 http://dx.doi.org/10.3389/fmars.2021.735826 https://www.frontiersin.org/articles/10.3389/fmars.2021.735826/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 8 ISSN 2296-7745 Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography journal-article 2021 crfrontiers https://doi.org/10.3389/fmars.2021.735826 2024-03-26T08:34:46Z The subarctic Pacific is one of the major high-nitrate, low-chlorophyll (HNLC) regions where marine productivity is greatly limited by the supply of iron (Fe) in the region. There is a distinct seasonal difference in the chlorophyll concentrations of the east and west sides of the subarctic Pacific because of the differences in their driving mechanisms. In the western subarctic Pacific, two chlorophyll concentration peaks occur: the peak in spring and early summer is dominated by diatoms, while the peak in late summer and autumn is dominated by small phytoplankton. In the eastern subarctic Pacific, a single chlorophyll concentration peak occurs in late summer, while small phytoplankton dominate throughout the year. In this study, two one-dimensional (1D) physical–biological models with Fe cycles were applied to Ocean Station K2 (Stn. K2) in the western subarctic Pacific and Ocean Station Papa (Stn. Papa) in the eastern subarctic Pacific. These models were used to study the role of Fe limitation in regulating the seasonal differences in phytoplankton populations by reproducing the seasonal variability in ocean properties in each region. The results were reasonably comparable with observational data, i.e., cruise and Biogeochemical-Argo data, showing that the difference in bioavailable Fe (BFe) between Stn. K2 and Stn. Papa played a dominant role in controlling the respective seasonal variabilities of diatom and small phytoplankton growth. At Stn. Papa, there was less BFe, and the Fe limitation of diatom growth was two times as strong as that at Stn. K2; however, the difference in the Fe limitation of small phytoplankton growth between these two regions was relatively small. At Stn. K2, the decrease in BFe during summer reduced the growth rate of diatoms, which led to a rapid reduction in diatom biomass. Simultaneously, the decrease in BFe had little impact on small phytoplankton growth, which helped maintain the relatively high small phytoplankton biomass until autumn. The experiments that stimulated a further ... Article in Journal/Newspaper Subarctic Frontiers (Publisher) Frontiers in Marine Science 8 |
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Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
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Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography Zhang, Hao-Ran Wang, Yuntao Xiu, Peng Qi, Yiquan Chai, Fei Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
topic_facet |
Ocean Engineering Water Science and Technology Aquatic Science Global and Planetary Change Oceanography |
description |
The subarctic Pacific is one of the major high-nitrate, low-chlorophyll (HNLC) regions where marine productivity is greatly limited by the supply of iron (Fe) in the region. There is a distinct seasonal difference in the chlorophyll concentrations of the east and west sides of the subarctic Pacific because of the differences in their driving mechanisms. In the western subarctic Pacific, two chlorophyll concentration peaks occur: the peak in spring and early summer is dominated by diatoms, while the peak in late summer and autumn is dominated by small phytoplankton. In the eastern subarctic Pacific, a single chlorophyll concentration peak occurs in late summer, while small phytoplankton dominate throughout the year. In this study, two one-dimensional (1D) physical–biological models with Fe cycles were applied to Ocean Station K2 (Stn. K2) in the western subarctic Pacific and Ocean Station Papa (Stn. Papa) in the eastern subarctic Pacific. These models were used to study the role of Fe limitation in regulating the seasonal differences in phytoplankton populations by reproducing the seasonal variability in ocean properties in each region. The results were reasonably comparable with observational data, i.e., cruise and Biogeochemical-Argo data, showing that the difference in bioavailable Fe (BFe) between Stn. K2 and Stn. Papa played a dominant role in controlling the respective seasonal variabilities of diatom and small phytoplankton growth. At Stn. Papa, there was less BFe, and the Fe limitation of diatom growth was two times as strong as that at Stn. K2; however, the difference in the Fe limitation of small phytoplankton growth between these two regions was relatively small. At Stn. K2, the decrease in BFe during summer reduced the growth rate of diatoms, which led to a rapid reduction in diatom biomass. Simultaneously, the decrease in BFe had little impact on small phytoplankton growth, which helped maintain the relatively high small phytoplankton biomass until autumn. The experiments that stimulated a further ... |
format |
Article in Journal/Newspaper |
author |
Zhang, Hao-Ran Wang, Yuntao Xiu, Peng Qi, Yiquan Chai, Fei |
author_facet |
Zhang, Hao-Ran Wang, Yuntao Xiu, Peng Qi, Yiquan Chai, Fei |
author_sort |
Zhang, Hao-Ran |
title |
Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
title_short |
Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
title_full |
Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
title_fullStr |
Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
title_full_unstemmed |
Roles of Iron Limitation in Phytoplankton Dynamics in the Western and Eastern Subarctic Pacific |
title_sort |
roles of iron limitation in phytoplankton dynamics in the western and eastern subarctic pacific |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fmars.2021.735826 https://www.frontiersin.org/articles/10.3389/fmars.2021.735826/full |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Frontiers in Marine Science volume 8 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2021.735826 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1796932445335977984 |