Modelling nutrient retention function of ecosystem – a case study in Baoxing County
文献类型：会议论文
| 作者 | wang yukuan ; xu pei; fu bin
|
| 出版日期 | 2012-01 |
| 会议名称 | 18th Biennial ISEM Conference on Ecological Modelling for Global Change and Coupled Human and Natural Systems |
| 会议日期 | 2011-9-20～23 |
| 会议地点 | Beijing Normal Univ, Beijing, PEOPLES R CHINA |
| 关键词 | Nutrient retention Ecosystem service Land use Critical source area Critical sink area Baoxing. |
| 期号 | 1 |
| 页码 | 111 – 121 |
| 通讯作者 | wang yukuan |
| 英文摘要 | Non-point source pollution is one of the crucial causes leading to degradation of rivers and lake water quality; therefore, it has been studied in depth worldwide. However, few studies exploring the effect of terrestrial ecosystem nutrient retention function on water quality have been conducted to date. Natural ecosystems such as forests and grassland can hold runoff and sediment, thereby reducing the nutrients entering nearby aquatic systems, which is very important to improving water quality. Based on the landscape source-sink theory, this study assessed the nutrient retention function of ecosystems. The results showed that terrestrial ecosystems retained 78% of the Total Nitrogen (TN) within the system, thereby significantly reducing the TN entering the water. The nutrient retention function of different ecosystems varied significantly. Forests had the greatest potential capacity to maintain TN, but the actual retained TN was only about 10% of that applied to cropland. Because of irrational land use patterns, the potential forest intercepting nutrient function was not fully utilized. Specifically, nutrient retention function varied with altitude and slope. When the altitude was in the range of 1000 m or between 4000 m and 4500 m, the highest function could be attained, resulting to increases or decreases between regions. The nutrient retention function decreased as slope increased. The critical source area (CSA) was primarily distributed along the river bank. However, the critical sink area which made a high contribution to nutrient reduction did not appear that similar distribution like CSA. The critical sink area scatted in the whole basin mainly and only overlapped with the critical source areas in some place. |
| 会议主办者 | Int Soc Ecol Modelling |
| 会议录 | Procedia Environmental Sciences
 |
| 学科主题 | 生态学 |
| 语种 | 英语 |
| ISSN号 | 1878-0296 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4383]  |
| 专题 | 成都山地灾害与环境研究所_山区发展研究中心 |
| 推荐引用方式 GB/T 7714 | wang yukuan,xu pei,fu bin. Modelling nutrient retention function of ecosystem – a case study in Baoxing County[C]. 见:18th Biennial ISEM Conference on Ecological Modelling for Global Change and Coupled Human and Natural Systems. Beijing Normal Univ, Beijing, PEOPLES R CHINA. 2011-9-20～23. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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