中文摘要：

通过交通要素、居民点要素和数字高程模型计算人类活动强度,并利用改进的光能利用率概念模型估算了甘肃省净初级生产力.研究了人类活动强度和净初级生产力之间关系的内在原因,探讨了人类活动强度对净初级生产力的影响.研究表明：甘肃省的人类活动强度平均值为0.31,整体表现不强,但区域分布差异明显,中间强外围弱,东南强西北弱;对于不同生态区,人类活动强度在农业生态区中最大,而在荒漠生态区中最小;以县级行政中心为视角,人类活动强度在瓜州县、金塔县和肃南裕固族自治县周围对净初级生产力起正作用,但在永昌县、靖远县、通渭县和文县对净初级生产力起负作用;以不同生态区为视角,人类活动强度和净初级生产力之间的关系,在森林生态区最显著,在草原生态区比较稳定,在农业生态区增加和减少交错分布,在荒漠生态区变化的区域极不均匀.本研究从不同视角解析人类活动对生态环境变化的作用,为更好地改善不同生态区生态环境提供一定的对策与建议.

英文摘要：

The intensity of human activities was calculated through the traffic factors,residential elements and digital elevation model,and the spatial distribution of net primary productivity in Gansu Province was simulated by the improving carnegie-ames-stanford approach model.We studied the internal causes of distribution between the intensity of human activities and net primary productiuty（NPP）,and discussed the influence of intensity of human activities on NPP.The results showed that the average value of human activity intensity was0.31 in Gansu Province,which was characterized by obvious regional distribution difference,reflecting that the central area was stronger than the marginal,and the southeastern regions was stronger than northwestern.As for individual biomes,the intensity of human activity was higher in the agricultural biome,and was lower in the desert biome.In the perspective of county administration center,human activities intensity played a positive correlation on the NPP in Guazhou County,Jinta County,Yugur Autonomous County of Sunan and its adjacent regions.However,it played a negative correlation in Yongchang County,Jingyuan County,Tongwei County and Wenxian County.In the perspective of different ecological biomes,the relationships between human activities intensity and NPP was shown most significant in the forest biome,relatively stable in the grassland biome,the increased and decreased of staggered distribution in agriculture biome,and uneven changed in the desert biome.The aim of this work was to critically assess the effect of human activities for the different perspective,which resulted from the ecological environment change,in order to better improve and provide some countermeasures and suggestions of ecological environment of different biomes.