Trace metal effects on gross primary productivity and its associative environmental risk assessment in a subtropical lake, China
文献类型：期刊论文
| 作者 | Jia, Junjie1,3; Gao, Yang1,2; Lu, Yao1,3; Shi, Kun2; Li, Zhaoxi1,3; Wang, Shuoyue1,3 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020-04-01 |
| 卷号 | 259页码:11 |
| 关键词 | Trace metal Gross primary productivity Phytoplankton Poyang lake basin Water quality assessment |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2019.113848 |
| 通讯作者 | Gao, Yang(gaoyang@igsnrr.ac.cn) |
| 英文摘要 | The transport of trace metals in river-lake systems can potentially increase or decrease primary productivity in some basins and subsequently affect the carbon cycle of watersheds. In this study, we investigated a variety of trace metal concentrations and transport flux in the Poyang Lake basin during four seasons. Results show that the Gan River transports 78% of selenium (Se) and 42% of lead (Pb) into Poyang Lake each year, resulting in heavy metal pollution dominated by Pb and Se in 30%-75% of its water. Although toxic heavy metals, such as Pb, chromium (Cr), and copper (Cu), inhibit phytoplankton growth and decrease its gross primary productivity (GPP), excessive Se could effectually promote productivity. However, the negative effect of Pb on GPP is more significant than the positive effect of Se on GPP; hence, their interaction effectuates a decrease in total primary productivity. Additionally, under high nutrients level, the synergistic effect of heavy metals and nutrients will reduce GPP. Agricultural fertilizer is likely the source of both Pb, Cu, Se and N. Gan River contributes 35%-80% of the heavy metal inputs to Poyang Lake. It is therefore necessary to improve the ecological environment of phytoplankton and promote productivity in the Poyang Lake basin by reducing the application of agricultural chemical fertilizers to control pollution. Our results indicate that the role of certain, less studied trace elements (e.g., Pb, Cr, Cu, and Se) in regulating primary productivity of watershed ecosystems is more important than previously thought. This study also discusses potential impacting mechanisms associated with these metals on phytoplankton, whose biological functions need to be verified in future experiments. (C) 2019 Elsevier Ltd. All rights reserved. |
| WOS关键词 | POYANG LAKE ; PHYTOPLANKTON COMMUNITY ; NATURAL PHYTOPLANKTON ; MARINE-PHYTOPLANKTON ; SPATIAL VARIATIONS ; WATER-QUALITY ; DRY SEASONS ; COPPER ; TOXICITY ; SYSTEM |
| 资助项目 | National Natural Science Foundation of China[41922003] ; National Natural Science Foundation of China[41871080] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000528534600121 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/159722]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Gao, Yang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Junjie,Gao, Yang,Lu, Yao,et al. Trace metal effects on gross primary productivity and its associative environmental risk assessment in a subtropical lake, China[J]. ENVIRONMENTAL POLLUTION,2020,259:11. |
| APA | Jia, Junjie,Gao, Yang,Lu, Yao,Shi, Kun,Li, Zhaoxi,&Wang, Shuoyue.(2020).Trace metal effects on gross primary productivity and its associative environmental risk assessment in a subtropical lake, China.ENVIRONMENTAL POLLUTION,259,11. |
| MLA | Jia, Junjie,et al."Trace metal effects on gross primary productivity and its associative environmental risk assessment in a subtropical lake, China".ENVIRONMENTAL POLLUTION 259(2020):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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