青海湖地区沙生植被遥感解译及其保护

Image Interpretation of Psammophyte around Qinghai Lake and its Protection

应用遥感技术解译青海湖地区沙生植被的影象物征,地面群落学调查结合的方法,将环湖地区沙生植被划分为6个群落类型。其分布特点表现为:(1)沙丘边缘环带状分布;(2)沙丘间呈孤岛状分布;(3)沙堤带状分布;(4)湖水退缩后的沙地植被演替。为本区沙生植被的保护及沙化治理提供一些基础资料。

Qinghai Lake is located in the northwestern edge of Qinghai-Xizang (Tibet) Plateau. There are many sand dunes in the area around Qinghai Lake,Qinghai Province,China. Expecially they are widely distributed in the eastern shore of the lake. Based on the investigation of sandy vegetation, we analyze and discuss the image characteristics of psammophyte by remote sensing technique. Six communuty types of psammophyte are reported in this paper. They are Artemisis sphaerocephala-Oxytropis acciphglla, Sabina vulgaris, Clematis tangutica, Ephedra intermedia, grasses on the sand dykes, and sparse weeds on the shore around the lake. The distributional characteristics of the psammophyte are as followes: (1) encircle-state distribution around the edge of the sand dunes, (2) island distribution in the dunes, (3) strip-belt distribution on the sand dykes, and (4) vegetation succession on the beach sand when the water retreated.