Organic carbon source and burial during the past one hundred years in Jiaozhou Bay, North China

	Organic carbon source and burial during the past one hundred years in Jiaozhou Bay, North China
	Li Xuegang; Yuan Huamao; Li Ning; Song Jinming
	2008
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN	1001-0742
卷号	20 期号:5 页码:551-557
文章类型	Article
摘要	Organic carbon (OC), total nitrogen (TN), and (210)Pb in core sediment were measured to quantify the burial of organic carbon and the relative importance of allochthonous and autochthonous contributions during the past one hundred years in Jiaozhou Bay, North China. The core sediment was dated using (210)Pb chronology, which is the most promising method for estimation of sedimentation rate on a time scale of 100-150 years. The variation of the burial flux of organic carbon in the past one hundred years can be divided into the following three stages: (1) relatively steady before 1980s; (2) increasing rapidly from the 1980s to a peak in the 1990s, and (3) decreasing from the 1990s to the present. The change is consistent with the amount of solid waste and sewage emptied into the bay. The OC:TN ratio was used to evaluate the source of organic carbon in the Jiaozhou Bay sediment. In the inner bay and bay mouth, the organic carbon was the main contributor from terrestrial sources, whereas only about half of organic carbon was contributed from terrestrial source in the outer bay. In the inner bay, the terrestrial source of organic carbon showed a steady change with an increase in the range of 69%-77% before 1990 to 93% in 2000, and then decreased from 2000 because of the decrease in the terrestrial input. In the bay mouth, the percentage of organic carbon from land reached the highest value with 94% in 1994. In the outer bay, the sediment source maintained steady for the past one hundred years.; Organic carbon (OC), total nitrogen (TN), and Pb-210 in core sediment were measured to quantify the burial of organic carbon and the relative importance of allochthonous and autochthonous contributions during the past one hundred years in Jiaozhou Bay, North China. The core sediment was dated using Pb-210 chronology, which is the most promising method for estimation of sedimentation rate on a time scale of 100-150 years. The variation of the burial flux of organic carbon in the past one hundred years can be divided into the following three stages: (1) relatively steady before 1980s; (2) increasing rapidly from the 1980s to a peak in the 1990s, and (3) decreasing from the 1990s to the present. The change is consistent with the amount of solid waste and sewage emptied into the bay. The OC:TN ratio was used to evaluate the source of organic carbon in the Jiaozhou Bay sediment. In the inner bay and bay mouth, the organic carbon was the main contributor from terrestrial sources, whereas only about half of organic carbon was contributed from terrestrial source in the outer bay. In the inner bay, the terrestrial source of organic carbon showed a steady change with an increase in the range of 69%-77% before 1990 to 93% in 2000, and then decreased from 2000 because of the decrease in the terrestrial input. In the bay mouth, the percentage of organic carbon from land reached the highest value with 94% in 1994. In the outer bay, the sediment source maintained steady for the past one hundred years.
关键词	Organic Carbon Source Burial Jiaozhou Bay
学科领域	Environmental Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000255846200006
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5358
专题	海洋生态与环境科学重点实验室
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Li Xuegang,Yuan Huamao,Li Ning,et al. Organic carbon source and burial during the past one hundred years in Jiaozhou Bay, North China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2008,20(5):551-557.
APA	Li Xuegang,Yuan Huamao,Li Ning,&Song Jinming.(2008).Organic carbon source and burial during the past one hundred years in Jiaozhou Bay, North China.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,20(5),551-557.
MLA	Li Xuegang,et al."Organic carbon source and burial during the past one hundred years in Jiaozhou Bay, North China".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 20.5(2008):551-557.

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