The Human Threat to River Ecosystems at the Watershed Scale: An Ecological Security Assessment of the Songhua River Basin, Northeast China
文献类型：期刊论文
| 作者 | Tang, Mingfang; Shen, Yuan; Cao, Huiming; Deng, Hongbing |
| 刊名 | WATER
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 9期号:3页码:- |
| 关键词 | Human Threat River Ecosystem Integrity Ecological Security Assessment Watershed Scale Ecological Threat Index Songhua River Basin |
| 英文摘要 | Human disturbances impact river basins by reducing the quality of, and services provided by, aquatic ecosystems. Conducting quantitative assessments of ecological security at the watershed scale is important for enhancing the water quality of river basins and promoting environmental management. In this study, China's Songhua River Basin was divided into 204 assessment units by combining watershed and administrative boundaries. Ten human threat factors were identified based on their significant influence on the river ecosystem. A modified ecological threat index was used to synthetically evaluate the ecological security, where frequency was weighted by flow length from the grids to the main rivers, while severity was weighted by the potential hazard of the factors on variables of river ecosystem integrity. The results showed that individual factors related to urbanization, agricultural development and facility construction presented different spatial distribution characteristics. At the center of the plain area, the provincial capital cities posed the highest level of threat, as did the municipal districts of prefecture-level cities. The spatial relationships between hot spot locations of the ecological threat index and water quality, as well as the distribution areas of critically endangered species, were analyzed. The sensitivity analysis illustrated that alteration of agricultural development largely changed the ecological security level of the basin. By offering a reference for assessing ecological security, this study can enhance water environmental planning and management. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39126]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Tang, Mingfang,Shen, Yuan,Cao, Huiming,et al. The Human Threat to River Ecosystems at the Watershed Scale: An Ecological Security Assessment of the Songhua River Basin, Northeast China[J]. WATER,2017,9(3):-. |
| APA | Tang, Mingfang,Shen, Yuan,Cao, Huiming,&Deng, Hongbing.(2017).The Human Threat to River Ecosystems at the Watershed Scale: An Ecological Security Assessment of the Songhua River Basin, Northeast China.WATER,9(3),-. |
| MLA | Tang, Mingfang,et al."The Human Threat to River Ecosystems at the Watershed Scale: An Ecological Security Assessment of the Songhua River Basin, Northeast China".WATER 9.3(2017):-. |
入库方式： OAI收割
来源：生态环境研究中心
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