Description method research of river habitat characteristics based on landscape pattern indices
In this paper,the Heishui River,a tributary of the Jinsha River,was selected as a research object.With the help of the landscape pattern index,an index set describing the habitat characteristics was screened and established.The changing law of the habitat characteristics in the section of the Heishui River where the Sujiawan Power Station is located was analyzed,providing a basis for monitoring the sustainable development of the river and the restoration of the habitat.The results showed that the tem-poral and spatial distributions of habitat patches differed significantly under different working conditions.A total of 11 representa-tive indicators were extracted by the principal component analysis to describe the habitat characteristics in terms of shape,aggre-gation,complexity,etc.The set of habitat indicators obtained through the screening had four different trends with the flow changes,among which,the percentage of the patches in the landscape area,the degree of connectivity,the wholeness,and the radius of gy-ration-weighted area index were associated with the changes in fish-weighted available area significantly.The habitat landscape pattern indices reflect changes in fish habitat patch configuration and its quality,which can provide a reliable monitoring indicator for fish habitat restoration.
river habitat characteristicslandscape pattern indexsmall hydropower developmentHeishui River
国家科技期刊平台
NSTL
万方数据
