祁连山天老池流域灌丛地上生物量空间分

采用野外样地调查法，以祁连山寺大隆林区天老池流域高山灌丛为研究对象，建立灌丛地上生物量与易测因子(冠幅周长和灌丛丛高)之间的关系，采用面向对象分类法对研究区的高分辨率影像(GeoEye-1)的土地利用类型进行分类，提取出灌丛盖度的空间分布，建立灌丛地上生物量与盖度之间的关系式，估算灌丛地上总生物量.结果表明： 研究区灌丛地上总生物量为1.8×10³ t，单位面积地上生物量为1598.45 kg·hm^-2；灌丛地上生物量主要分布在海拔3000～3700 m范围内，并且阳坡(1.15×10³ t)>阴坡(0.65×10³ t).

Spatial distribution of aboveground biomass of shrubs in Tianlaochi catchment of the Qilian Mountains.

This study estimated the spatial distribution of the aboveground biomass of shrubs in the Tianlaochi catchment of Qilian Mountains based on the field survey and remote sensing data. A relationship model of the aboveground biomass and its feasibly measured factors (i.e., canopy perimeter and plant height) was built. The land use was classified by object oriented technique with the high resolution image (GeoEye-1) of the study area, and the distribution of shrub coverage was extracted. Then the total aboveground biomass of shrubs in the study area was estimated by the relationship model with the distribution of shrub coverage. The results showed that the aboveground biomass of shrubs in the study area was 1.8×10³ t and the aboveground biomass per unit area was 1598.45 kg·m^-2. The distribution of shrubs mainly was at altitudes of 3000-3700 m, and the aboveground biomass of shrubs on the sunny slope (1.15×10³ t) was higher than that on the shady slope (0.65×10³ t).