Late Holocene centennial to millennial-scale variability in lower trophic level productivity off southern Hokkaido, Japan, and its response to dissolved iron-replete Coastal Oyashio dynamics

Kuwae, Michinobu; Tsugeki, Narumi; Finney, Bruce P.; Tani, Yukinori; Onodera, Jonaotaro; Kiyoto, Mako; Kusaka, Mitsukuni; Sagawa, Takuya; Nakamura, Yugo; Ohnishi, Hiroji; Kuroda, Hiroshi; Okuda, Noboru; Ohta, Tamihisa; Ikehara, Minoru; Irino, Tomohisa

Late Holocene centennial to millennial-scale variability in lower trophic level productivity off southern Hokkaido, Japan, and its response to dissolved iron-replete Coastal Oyashio dynamics

Kuwae, Michinobu; Tsugeki, Narumi; Finney, Bruce P. et al.

Quaternary Research, 2022, 107, 27-42

Permalink : https://hdl.handle.net/2115/86599

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アクセス権	open access
URI	https://hdl.handle.net/2115/86599
タイトル	Late Holocene centennial to millennial-scale variability in lower trophic level productivity off southern Hokkaido, Japan, and its response to dissolved iron-replete Coastal Oyashio dynamics
著者	Kuwae, Michinobu ; Tsugeki, Narumi ; Finney, Bruce P. ; Tani, Yukinori ; Onodera, Jonaotaro ; Kiyoto, Mako ; Kusaka, Mitsukuni ; Sagawa, Takuya ; Nakamura, Yugo ; Ohnishi, Hiroji ; Kuroda, Hiroshi ; Okuda, Noboru ; Ohta, Tamihisa ; Ikehara, Minoru ; Irino, Tomohisa
e-Rad_Researcher 70448380 著者名 Kuwae, Michinobu
e-Rad_Researcher 20423618 著者名 Tsugeki, Narumi
著者名 Finney, Bruce P.
e-Rad_Researcher 10285190 著者名 Tani, Yukinori
e-Rad_Researcher 50467859 著者名 Onodera, Jonaotaro
著者名 Kiyoto, Mako
著者名 Kusaka, Mitsukuni
著者名 Sagawa, Takuya
著者名 Nakamura, Yugo
著者名 Ohnishi, Hiroji
e-Rad_Researcher 30531107 著者名 Kuroda, Hiroshi
e-Rad_Researcher 30380281 著者名 Okuda, Noboru
著者名 Ohta, Tamihisa
e-Rad_Researcher 90335919 著者名 Ikehara, Minoru
e-Rad_Researcher 70332476 著者名 Irino, Tomohisa
言語	英語
キーワード	Marine productivity
	Phytoplankton
	Zooplankton
	Centennial- to millennial-scale changes
	Coastal Oyashio
	Dissolved iron
	Western North Pacific
	Late Holocene
発行日	2022-05
出版者	Cambridge University Press
収録物名	Quaternary Research
巻(号)	107
ページ	27-42
抄録	Little is known about the dynamics of marine food chains spanning primary to higher trophic levels on centennial and longer timescales, especially where the supply of dissolved iron limits primary productivity. To elucidate the long-term dynamics of biological productivity in the Coastal Oyashio (CO), which is a major pathway for transporting dissolved iron into the western North Pacific from winter to spring, we reconstructed the lower trophic level productivity over the last 3000 years in the CO. Our results demonstrate that the concentrations and mass accumulation rates of both Chl-a (chlorophyll a and its derivatives) and biogenic opal used as proxies of primary productivity, and steryl chlorin esters (SCEs) used as that of zooplankton productivity, show a millennial-scale increasing trend and centennial-scale variability beginning ca. AD 400. SCEs were positively correlated with Chl-a, indicating that changes in zooplankton productivity were induced by bottom-up control of primary productivity. The Chl-a and SCEs showed synchronous centennial-scale patterns with a relative abundance of sea-ice-associated diatom species transported by CO, and with a ventilation index in the Okhotsk Sea Intermediate Water. This synchronous pattern indicates that lower trophic-level productivity during the spring bloom responded to the intensity of iron-replete CO.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
権利情報	This article has been published in a revised form in Quaternary Research, https://doi.org/10.1017/qua.2021.71. This version is free to view and download for private research and study only. Not for re-distribution or re-use. © copyright holder.
PISSN	0033-5894
NCID	AA00368728
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1017/qua.2021.71