气候变化领域集成服务门户(CCPortal): Central Equatorial Pacific benthic foraminifera during the mid-Brunhes dissolution interval: Ballasting of particulate organic matter by biogenic silica and carbonate

CCPortal

DOI	10.1016/j.quascirev.2019.02.030
	Central Equatorial Pacific benthic foraminifera during the mid-Brunhes dissolution interval: Ballasting of particulate organic matter by biogenic silica and carbonate
	Takata H.; Kim H.J.; Asahi H.; Thomas E.; Yoo C.M.; Chi S.B.; Khim B.-K.
发表日期	2019
ISSN	0277-3791
起始页码	64
结束页码	79
卷号	210
英文摘要	We evaluated the response of Quaternary abyssal benthic foraminifera in cores PC5101 (2º00.86′N, 131º34.32′W) and PC5103 (6º00.10′N, 131º28.57′W) of the Central Equatorial Pacific Ocean to the environmental changes over the past ∼520 kyrs, focusing on the mid-Brunhes dissolution interval (∼533–191 ka). We used multi-dimensional scaling (MDS) to derive MDS axis 1, reflecting food supply from low (negative scores) to high (positive scores) amounts, and MDS axis 2, reflecting variability in the food supply. From ∼120 ka on, Epistominella exigua, an indicator of variable food supply, was more abundant in core PC5103 (∼6 o N) than in core PC5101 (∼2 o N), but this was reversed from ∼300 to 250 ka. In core PC5101, MDS axis 1 scores are negatively correlated to the biogenic opal mass accumulation rates (MAR) after 249.6 ka, i.e., lower food supply at higher opal-MAR. In contrast, MDS axis 1 scores are positively correlated to the CaCO 3 -MAR from 520.8 to 331.2 ka. Both carbonate and opal skeletons might ballast particulate organic matter (POM) to enhance food supply to the benthos, but our data indicate that carbonate is more efficient and that changes in dominant ballasting of POM by different biominerals thus may have significantly affected the biological pump. During the transitional period (∼327.5–257.1 ka), ballasting of POM changed from control by calcareous plankton to control by siliceous plankton, with a transient period during which the latitudinal pattern of the Intertropical Convergence Zone was opposite to its modern pattern, with the more variable food supply at ∼ 6 o N. © 2019 Elsevier Ltd
英文关键词	Benthic foraminifera; Biotic response; Equatorial Pacific; Paleoceanography; Quaternary
语种	英语
scopus关键词	Biogeochemistry; Biological materials; Calcite; Calcium carbonate; Carbonation; Dissolution; Organic compounds; Plankton; Silica; Benthic foraminifera; Biotic response; Equatorial Pacific; Paleoceanography; Quaternary; Food supply; benthic foraminifera; biological pump; dissolution; food supply; intertropical convergence zone; paleoceanography; particulate matter; particulate organic matter; Quaternary; silica; Pacific Ocean; Pacific Ocean (Equatorial); Epistominella exigua; Foraminifera
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151981
作者单位	Marine Research Institute, Pusan National University, Busan, 46241, South Korea; Deep-sea and Seabed Resources Research Division, Korea Institute of Ocean Science and Technology, Busan, 49111, South Korea; Center for Advanced Marine Core Research, Kochi University, Nankoku, 783-8502, Japan; Department of Geology and Geophysics, Yale University, New Haven, CT 06520, United States; Earth and Environmental Sciences, Wesleyan University, Middletown, CT 06459, United States; Department of Oceanography, Pusan National University, Busan, 46241, South Korea
推荐引用方式 GB/T 7714	Takata H.,Kim H.J.,Asahi H.,et al. Central Equatorial Pacific benthic foraminifera during the mid-Brunhes dissolution interval: Ballasting of particulate organic matter by biogenic silica and carbonate[J],2019,210.
APA	Takata H..,Kim H.J..,Asahi H..,Thomas E..,Yoo C.M..,...&Khim B.-K..(2019).Central Equatorial Pacific benthic foraminifera during the mid-Brunhes dissolution interval: Ballasting of particulate organic matter by biogenic silica and carbonate.Quaternary Science Reviews,210.
MLA	Takata H.,et al."Central Equatorial Pacific benthic foraminifera during the mid-Brunhes dissolution interval: Ballasting of particulate organic matter by biogenic silica and carbonate".Quaternary Science Reviews 210(2019).