沙坡头地区人工-自然景观中人类活动对景观格局动态的影响

借助对腾格里沙漠东南缘沙坡头地区人工-自然荒漠景观分类、格局分析及流动沙丘，荒漠和绿洲的景观格局分析及其景观多样性、优势度、斑块大小比较，阐明了荒漠景观中绿洲和人工防护林建设的积极作用，结果表明，随着人类活动的加剧，景观的多样性增大，破碎化加剧，特别是铁路公路的建设以及为此而进行的防风固沙林的建设有效地保护了人类活动的成果；人为活动巳改变了荒漠局地的景观特性，生态恶化受到一定的遏止，但由于人类活动的经济目的性较强，因此人工景观中多样性值较低、斑块内容简单、形式单一，缺乏合理的布局和有效地管理和监测，沙化影响正在进一步威胁着人类对荒漠景观的管理成果。

Impact of anthropogenic activity on landscape spatial pattern dynamics in man-made and natural landscapes in Shapotou desert area of Ningxia,China

The important role of oasis and artificial forest in desert landscape was illuminated by means of classification and pattern analysis of diversity,donminance,and patch size of manmade and natural landscapes in Shapotou area of Ningxia,China.The results showed that the diversity and fragmentation of the landscapes are increasing with the increase of anthropogenic activity and that the construction of railway and sandfixing forest have effectively protected the achievement of human activity.Local desert landscape features have beeb changed by anthropogenic activity and the tendency of ecological worsening was held back to certain extent. Because of the strong economic goal of human activity,manmade landscape has lower diversity,simple patch types,and lack in proper redistribution and effective management and monitoring.Human management in the desert area is being threatened by desertification.