| 基于PCA的滇西北高原纳帕海湿地退化过程分析及其评价 |
| |
| 引用本文： | 尚文,杨永兴,韩大勇. 基于PCA的滇西北高原纳帕海湿地退化过程分析及其评价[J]. 生态学报, 2013, 33(15): 4776-4789 |
| |
| 作者姓名： | 尚文 杨永兴 韩大勇 |
| |
| 作者单位： | 同济大学环境科学与工程学院污染控制与资源化国家重点实验室,长江水环境教育部重点实验室,上海200092 |
| |
| 基金项目： | 国家自然科学基金资助项目(41171074, U0933601, 40771013) |
| |
| 摘 要： | 以滇西北高原纳帕海湖滨过度放牧、水文改变协同胁迫(简称GAD)和过度放牧单独胁迫(简称GD)退化湿地为研究对象,将其划分为4个梯度:原生湿地、轻度退化、中度退化、重度退化,采用聚类分析和主成分分析(PCA)在“植物-水体-土壤”系统上进行湿地退化过程、机制探讨及定量评价.沿退化梯度,植物群落演替规律为“水生植物群落→沼泽植物群落→沼泽化草甸植物群落→草甸植物群落”,群落结构趋于复杂,向中生植物群落演替;矿化度、总硬度、总碱度、氮、磷等水质指标在GD梯度上升,在GAD梯度下降,水文改变对水质影响显著;土壤有机质、全氮、速效氮含量降低,全磷、全钾有所增加,速效磷和速效钾含量无明显变化规律.基于PCA建立了纳帕海湖滨湿地退化模型,并给出不同程度退化湿地的阈值.
|
| 关 键 词： | 退化 过程 PCA 评价 纳帕海湿地 |
| 收稿时间： | 2012-05-06 |
| 修稿时间： | 2012-11-19 |
Process analysis and evaluation of wetlands degradation based on PCA in the lakeside of Napahai, Northwest Yunnan Plateau |
| |
| SHANG Wen,YANG Yongxing and HAN Dayong. Process analysis and evaluation of wetlands degradation based on PCA in the lakeside of Napahai, Northwest Yunnan Plateau[J]. Acta Ecologica Sinica, 2013, 33(15): 4776-4789 |
| |
| Authors: | SHANG Wen YANG Yongxing HAN Dayong |
| |
| Affiliation: | Key Laboratory of Yangtze River Water Environment, Ministry of Education, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Yangtze River Water Environment, Ministry of Education, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Yangtze River Water Environment, Ministry of Education, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China |
| |
| Abstract: | |
| |
| Keywords: | degradation process PCA evaluation Napahai wetlands |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《生态学报》浏览原始摘要信息 |
|
点击此处可从《生态学报》下载全文 |
|
