Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water
The Amundsen Sea continental shelf (ACS) water ecosystem is expected to undergo changes since the increasing melt rate of glaciers and decreasing sea ice extent by global warming would lead to the mitigation of iron and light limitation. We investigated how diatoms and Phaeocystis, two dominant taxa...
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ftzenodo:oai:zenodo.org:3997882 2023-06-06T11:43:17+02:00 Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water Kwon, Young Shin La, Hyoung Sul La Jung, Jinyoung Lee, Sang Kim, Tae-Wan Kang, Hyoun-woo Lee, SangHoon 2021-04-21 https://zenodo.org/record/3997882 https://doi.org/10.5061/dryad.9kd51c5dz unknown https://zenodo.org/communities/dryad https://zenodo.org/record/3997882 https://doi.org/10.5061/dryad.9kd51c5dz oai:zenodo.org:3997882 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other dataset 2021 ftzenodo https://doi.org/10.5061/dryad.9kd51c5dz 2023-04-13T23:02:01Z The Amundsen Sea continental shelf (ACS) water ecosystem is expected to undergo changes since the increasing melt rate of glaciers and decreasing sea ice extent by global warming would lead to the mitigation of iron and light limitation. We investigated how diatoms and Phaeocystis, two dominant taxa, and primary production in the ACS water would respond to variations in iron and light availabilities by using a 1-D pelagic ecosystem model. In the model, we added sea ice effects that reduce light penetration and optimized model parameters for diatoms and Phaeocystis. The results from our model showed good agreement with 20-year observations of Chl-a as well as the biomass proportion of diatoms and Phaeocystis and nutrient distributions during the growing season. Our model experimental results suggest that the current moderate iron and high light conditions favor the growth of Phaeocystis over diatoms. Moreover, as iron increases, the organic carbon exudation by phytoplankton increases more rapidly than net primary production (NPP), leading to a decline in phytoplankton biomass. On the other hand, irradiance plays a role in controlling NPP in terms of photoinhibition which is reduced by increasing iron. Increases in both iron and irradiance lead to an advance in the timing of the bloom peak (surface Chl-a maximum) due to increases in phytoplankton carbon loss and photoinhibition. Our results imply that the dominance of Phaeocystis can continue and that the carbon uptake capacity of the ACS in the summer seasons might increase given that iron availability will increase with future climate change. Funding provided by: Korea Polar Research InstituteCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100004230Award Number: PE21110,PE20160,PE20140Funding provided by: National Research Foundation of KoreaCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100003725Award Number: NRF‐2018H1A2A1060886 Dataset Amundsen Sea Sea ice Zenodo Amundsen Sea |
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The Amundsen Sea continental shelf (ACS) water ecosystem is expected to undergo changes since the increasing melt rate of glaciers and decreasing sea ice extent by global warming would lead to the mitigation of iron and light limitation. We investigated how diatoms and Phaeocystis, two dominant taxa, and primary production in the ACS water would respond to variations in iron and light availabilities by using a 1-D pelagic ecosystem model. In the model, we added sea ice effects that reduce light penetration and optimized model parameters for diatoms and Phaeocystis. The results from our model showed good agreement with 20-year observations of Chl-a as well as the biomass proportion of diatoms and Phaeocystis and nutrient distributions during the growing season. Our model experimental results suggest that the current moderate iron and high light conditions favor the growth of Phaeocystis over diatoms. Moreover, as iron increases, the organic carbon exudation by phytoplankton increases more rapidly than net primary production (NPP), leading to a decline in phytoplankton biomass. On the other hand, irradiance plays a role in controlling NPP in terms of photoinhibition which is reduced by increasing iron. Increases in both iron and irradiance lead to an advance in the timing of the bloom peak (surface Chl-a maximum) due to increases in phytoplankton carbon loss and photoinhibition. Our results imply that the dominance of Phaeocystis can continue and that the carbon uptake capacity of the ACS in the summer seasons might increase given that iron availability will increase with future climate change. Funding provided by: Korea Polar Research InstituteCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100004230Award Number: PE21110,PE20160,PE20140Funding provided by: National Research Foundation of KoreaCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100003725Award Number: NRF‐2018H1A2A1060886 |
format |
Dataset |
author |
Kwon, Young Shin La, Hyoung Sul La Jung, Jinyoung Lee, Sang Kim, Tae-Wan Kang, Hyoun-woo Lee, SangHoon |
spellingShingle |
Kwon, Young Shin La, Hyoung Sul La Jung, Jinyoung Lee, Sang Kim, Tae-Wan Kang, Hyoun-woo Lee, SangHoon Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
author_facet |
Kwon, Young Shin La, Hyoung Sul La Jung, Jinyoung Lee, Sang Kim, Tae-Wan Kang, Hyoun-woo Lee, SangHoon |
author_sort |
Kwon, Young Shin |
title |
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
title_short |
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
title_full |
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
title_fullStr |
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
title_full_unstemmed |
Exploring the roles of iron and irradiance in dynamics of diatoms and Phaeocystis in the Amundsen Sea continental shelf water |
title_sort |
exploring the roles of iron and irradiance in dynamics of diatoms and phaeocystis in the amundsen sea continental shelf water |
publishDate |
2021 |
url |
https://zenodo.org/record/3997882 https://doi.org/10.5061/dryad.9kd51c5dz |
geographic |
Amundsen Sea |
geographic_facet |
Amundsen Sea |
genre |
Amundsen Sea Sea ice |
genre_facet |
Amundsen Sea Sea ice |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/3997882 https://doi.org/10.5061/dryad.9kd51c5dz oai:zenodo.org:3997882 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.9kd51c5dz |
_version_ |
1767954025172434944 |