生态学杂志2012，Vol.31Issue(7)：1798-1806,9.
洱海流域水生态分区
Aquatic eco-regionalization of Erhai Lake Basin, Yunnan Province of Southwest China
摘要
Abstract
Delineation of regional boundary is an important procedure in ecological regionaliza-tion, but at present, this delineation for aquatic eco-regionalization is mostly dependent on qualitative analysis and expert judgment. In this paper, a two-level eco-region framework was established to delineate the aquatic eco-regions in Erhai Lake Basin. In this framework, sub-basin was taken as the basic unit based on GIS technique, and the indices for the two-level regionalization were quantitatively screened by correlation analysis. Altitude, slope, and normalized difference vegetation index were identified as the indices for level I, and farmland and urban area percentages were the indices for level II. The index maps were overlaid and re-classified, and the sub-basins were further merged into several regions. Five level-I eco-regions and nine level- II eco-regions were delineated finally. The examination through the comparison of the distribution of algal communities in different eco-regions showed that the regionalization result was reasonable. It was suggested that applying quantitative analysis and sub-basin boundaries in aquatic eco-regionalization could make the delineation of regional boundary more scientific and the actual management more operational. This study provided a new method for the study of aquatic eco-regional-izalion, and the basic units for the aquatic ecological management of Erhai Lake Basin.关键词
洱海流域/水生态分区/子流域Key words
Erhai Lake Basin/ aquatic eco-regionalization/ sub-basin.分类
农业科技引用本文复制引用
杨顺益,唐涛,蔡庆华,肖文,汪兴中,李凤清,唐佳..洱海流域水生态分区[J].生态学杂志,2012,31(7):1798-1806,9.基金项目
国家水体污染控制与治理科技重大专项(2008ZX07526-002-07)资助. （2008ZX07526-002-07）
