$Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific$
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Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific

Abstract Iron (Fe) is well known as a limiting factor to control primary productivity especially in high-nutrient and low chlorophyll area such as the subarctic Pacific. The solubility of Fe is believed to be controlled by its complexation with natural organic ligands, while the distribution of orga...

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Autores principales:	Yoshiko Kondo, Rise Bamba, Hajime Obata, Jun Nishioka, Shigenobu Takeda
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/95ed7869e4e04bf49a11c6cf2e6ea1f7
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id	oai:doaj.org-article:95ed7869e4e04bf49a11c6cf2e6ea1f7
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spelling	oai:doaj.org-article:95ed7869e4e04bf49a11c6cf2e6ea1f72021-12-02T13:51:16ZDistinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific10.1038/s41598-021-81536-62045-2322https://doaj.org/article/95ed7869e4e04bf49a11c6cf2e6ea1f72021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81536-6https://doaj.org/toc/2045-2322Abstract Iron (Fe) is well known as a limiting factor to control primary productivity especially in high-nutrient and low chlorophyll area such as the subarctic Pacific. The solubility of Fe is believed to be controlled by its complexation with natural organic ligands, while the distribution of organic ligands is poorly understood. Here, we report that dissolved (< 0.2 µm) organic ligands were unevenly distributed between the western and eastern stations in the subarctic Pacific. The concentration of dissolved organic ligands around the lower part of subarctic Pacific intermediate water was higher in the western station, suggesting that Fe complexation with these organic ligands supports a lateral transport within the water mass. However, a more detailed size-fractionated treatment indicated no significant difference in the soluble (< 1000 kDa) ligands’ distribution between the western and eastern stations. These results suggest that organic and inorganic colloid formations are potentially essential for Fe transport mechanisms in the subarctic Pacific.Yoshiko KondoRise BambaHajime ObataJun NishiokaShigenobu TakedaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yoshiko Kondo Rise Bamba Hajime Obata Jun Nishioka Shigenobu Takeda Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
description	Abstract Iron (Fe) is well known as a limiting factor to control primary productivity especially in high-nutrient and low chlorophyll area such as the subarctic Pacific. The solubility of Fe is believed to be controlled by its complexation with natural organic ligands, while the distribution of organic ligands is poorly understood. Here, we report that dissolved (< 0.2 µm) organic ligands were unevenly distributed between the western and eastern stations in the subarctic Pacific. The concentration of dissolved organic ligands around the lower part of subarctic Pacific intermediate water was higher in the western station, suggesting that Fe complexation with these organic ligands supports a lateral transport within the water mass. However, a more detailed size-fractionated treatment indicated no significant difference in the soluble (< 1000 kDa) ligands’ distribution between the western and eastern stations. These results suggest that organic and inorganic colloid formations are potentially essential for Fe transport mechanisms in the subarctic Pacific.
format	article
author	Yoshiko Kondo Rise Bamba Hajime Obata Jun Nishioka Shigenobu Takeda
author_facet	Yoshiko Kondo Rise Bamba Hajime Obata Jun Nishioka Shigenobu Takeda
author_sort	Yoshiko Kondo
title	Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
title_short	Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
title_full	Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
title_fullStr	Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
title_full_unstemmed	Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific
title_sort	distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic pacific
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/95ed7869e4e04bf49a11c6cf2e6ea1f7
work_keys_str_mv	AT yoshikokondo distinctprofilesofsizefractionatedironbindingligandsbetweentheeasternandwesternsubarcticpacific AT risebamba distinctprofilesofsizefractionatedironbindingligandsbetweentheeasternandwesternsubarcticpacific AT hajimeobata distinctprofilesofsizefractionatedironbindingligandsbetweentheeasternandwesternsubarcticpacific AT junnishioka distinctprofilesofsizefractionatedironbindingligandsbetweentheeasternandwesternsubarcticpacific AT shigenobutakeda distinctprofilesofsizefractionatedironbindingligandsbetweentheeasternandwesternsubarcticpacific
_version_	1718392394860199936

Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific

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