Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas

doi:10.1007/s00343-022-2013-5

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas
	Fan, Xin 3,4,5; Cheng, Fangjin 1; Yu, Zhiming 2,3,4; Song, Xiuxian 2,3,4
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2022-04-29
页码	17
关键词	Changjiang River estuary dissolved inorganic nitrogen (DIN) reconstruction diatoms transfer function
ISSN号	2096-5508
DOI	10.1007/s00343-022-2013-5
通讯作者	Song, Xiuxian(songxx@qdio.ac.cn)
英文摘要	A five-component weighted average partial least squares (WA-PLS) calibration model was developed by analysing diatom assemblages in 34 surface sediment samples (collected in 2015) from the Changjiang River estuary (CRE) and its adjacent areas to infer dissolved inorganic nitrogen (DIN) concentrations. Eighteen additional sets of surface sediment diatoms and corresponding upper water DIN data (collected in 2012) were used to evaluate the accuracy of the model, and the relationship between observed and diatom-inferred DIN (DI-DIN) values (R-2=0.85) illustrated the strong performance of the transfer function, indicating that precise reconstructions of former DIN are possible. The diatom-DIN transfer function was applied to the diatom record from a sediment core DH8-2 (1962-2012) collected in the Fujian-Zhejiang area south of the CRE. The reconstruction based on the DI-DIN model showed a significant DIN increase from 1962-2012, reflecting the influence of human activities on the very large increase in eutrophication. Three distinct periods can be seen from the changes in DIN and diatom taxa. In the 1962-1972 period, the DIN content was relatively low, with an average of 5.94 mu mol/L, and more than 80% of the diatom species identified were benthic taxa. In the 1972-2004 period, as the impact of human activities intensified, large nutrient inputs caused the DIN content to increase, with an average of 8.25 mu mol/L. The nutrient inputs also caused a significant change in the nutrient components and a distinct increase in small planktonic taxa. In the 2004-2012 period, the DIN content continued to rise, fluctuating at approximately 10 mu mol/L. A continuous increase in the frequency of planktonic taxa (up to 65.48%) indicated that eutrophication was further intensified, which was confirmed by the transformation from diatom-induced red tide to dinoflagellate-induced red tide during this period.
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000900072300001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181058]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Song, Xiuxian
作者单位	1.Environm Monitoring Ctr Qingdao, Qingdao 266003, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 5.Shandong Jiaotong Univ, Coll Naval Architecture & Port Engn, Weihai 264209, Peoples R China
推荐引用方式 GB/T 7714	Fan, Xin,Cheng, Fangjin,Yu, Zhiming,et al. Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2022:17.
APA	Fan, Xin,Cheng, Fangjin,Yu, Zhiming,&Song, Xiuxian.(2022).Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,17.
MLA	Fan, Xin,et al."Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2022):17.