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| 长江口沉积记录反映的近80年陆源输入和营养盐变化特征 | |
| 作者姓名： | LI Junlong ZHENG Binghui HU Xupeng WANG Yiming DING Ye LIU Fang |
| 作者单位： | College of Water Sciences, Beijing Normal University, Beijing 100875, China;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Center, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,Zhoushan Marine Ecological Environmental Monitoring Station, Zhoushan 316000, China,Zhoushan Marine Ecological Environmental Monitoring Station, Zhoushan 316000, China,State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Center, Beijing 100012, China,State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Center, Beijing 100012, China |
| 基金项目： | The Environmental Protection Public Welfare Project of China under contract No. 201309008; the Environmental Protection Research Project of Zhejiang Province under contract No. 200830. |
| 摘 要： | A variety of environmental problems have been observed in the Changjiang River Estuary and adjacent coastal area, including eutrophication, harmful algal blooms (HABs), and hypoxia in recent decades. A... |
| 关 键 词： | 生源要素 磷形态 柱状沉积物 长江口 |
| 收稿时间： | 2013/11/12 0:00:00 |
| 修稿时间： | 2014/4/25 0:00:00 |
Terrestrial input and nutrient change reflected by sediment records of the Changjiang River Estuary in recent 80 years |
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| LI Junlong,ZHENG Binghui,HU Xupeng,WANG Yiming,DING Ye,LIU Fang.Terrestrial input and nutrient change reflected by sediment records of the Changjiang River Estuary in recent 80 years[J].Acta Oceanologica Sinica,2015,34(2):27-35. | |
| Authors: | LI Junlong ZHENG Binghui HU Xupeng WANG Yiming DING Ye and LIU Fang |
| Institution: | 1. College of Water Sciences, Beijing Normal University, Beijing 100875, China 2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China 3. Zhoushan Marine Ecological Environmental Monitoring Station, Zhoushan 316000, China 4. State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Center, Beijing 100012, China |
| Abstract: | A variety of environmental problems have been observed in the Changjiang River Estuary and adjacent coastal area, including eutrophication, harmful algal blooms (HABs), and hypoxia in recent decades. Application of sedimentary biogenic element indicators on the study of paleoenvironment can reconstruct environmental evolution history of waters. Two 210Pb-dated cores were collected from the Changjiang River Estuary (S3) and adjacent coastal area (Z13), and total organic carbon (TOC), total nitrogen (TN), biogenic silicon (BSi), total phosphorus (TP) and phosphorus (P) species were analyzed. Three stages of environmental changes are deduced by the nutrient sedimentary records. First, nutrient concentration increased rapidly since the 1950s, which attributed to agriculture development and overused chemical fertilizers. Second, nutrient concentration kept high and primary production began to promote during the 1960s to 1980s, while diatom abundance and proportion began to decline since the 1970s, accompanied by reduced SiO32- concentration and flux from the river. Third, due to several dams and bridges constructed, river runoff and coastal hydrodynamic conditions reduced to a certain extent since the 1990s, which aggravated the unbal-ance in nutrient structure. Multi-nutrient proxies in sediment can reflect the natural environm-ental changes as well as influence of human activities. |
| Keywords: | biogenic elements phosphorus species sediment cores Changjiang River Estuary |
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