Abstract
In this paper, GIS and RS spatial analysis techniques were used to establish a system for identifying sensitive targets of terrestrial ecosystems in Chishui River Basin, and to identify protection targets of terrestrial ecosystems in different regions. The result shows that the assessment of habitat sensitivity in Chishui River Basin was dominated by non-sensitive areas and highly sensitive areas, which highly sensitive areas account for 60.43% of the basin area, mostly concentrated in the mountainous areas at the junction of Chishui City, Xishui County and Gulin County; non-sensitive areas account for 39.13% and are mosaically distributed with highly sensitive areas; mildly sensitive areas, moderately sensitive areas and extremely sensitive areas account for a total of about 0.5% of the basin area and are more scattered throughout the basin. The distribution is scattered. The moderately sensitive areas in the Chishui River Basin are more than 60.7% of the basin area, indicating that the habitats in the Chishui River Basin are generally sensitive and the ecologically sensitive targets are mainly wooded areas, which need to be protected.
Highlights
Chishui River is located in the upper reaches of the Yangtze River at the junction of Yunnan, Guizhou and Sichuan provinces
In the form of expression, in order to represent the identified ecologically sensitive targets more intuitively on the map, this paper proposes to adopt the form of "high level habitat sensitivity distribution map"
A sensitivity assessment system of ecosystem in Chishui River Basin based on biodiversity conservation is established by using GIS or RS spatial analysis techniques, and the conservation objectives of ecosystem in different regions are identified
Summary
Chishui River is located in the upper reaches of the Yangtze River at the junction of Yunnan, Guizhou and Sichuan provinces. It originates in Zhenxiong County, northern Yunnan Province. Ma Qi [8] analyzed the 10-year change of ecological sensitivity of Wuding River in northern Shaanxi from three aspects of soil erosion sensitivity, habitat sensitivity and desertification. The study area in this paper is Chishui River Basin, which is currently facing threats such as habitat destruction of biodiversity. The types and quantity (i.e. area) of habitat play very important roles in protecting regional biodiversity, improving regional landscape quality and ecological environment quality, and have a direct impact on the stability and sensitivity of ecological environment.
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