九龙江口枝角类的分布

本文根据1983年2月至1984年1月在九龙江口采集的浮游动物样品,并参考1979年2月以来所采的样品,分析报道了该海区枝角类的种类组成和数量分布.共鉴定枝角类31种,以淡水类群占优势,种数季节分布为双周期型,总量分布为单周期型,种数和总量在河口上部数量高,在口部数量低。文中还讨论了其分布与环境因素的关系。     

Remote sensing analysis of desert vegetation and its landscape changes: The case in middle reaches of Tarim River Basin, Xinjiang, China

Based on remote sensing information sources including B/W aerial photos of 1983,pseudo-color aerial photos of 1992 and JERS-1/OPS VNIR image of 1996, vegetation types ofYingbazha, in the middle reaches of the Tarim River Basin in Xinjiang, China are mapped usingARC/INFO and related software. The changes in vegetation areas and distribution conditions areanalyzed. As a result of natural and human influences, vegetation changes have temporal andspatial characteristics. According to the principles of landscape ecology and geographical informa-tion science, the landscape changes are indicated. Moreover, the remote sensing and GIS tech-niques are integrated to study vegetation and its landscape.