自然因素及人类活动对汾河流域生态系统的压力状况研究

Effects of natural factors and human activities on the pressure of ecosystem of the Fenhe River Basin

为了研究汾河流域生态环境的变化,文中采用光能利用率模型CASA分析了2000-2015年间气候因素和人类活动对汾河流域植被净初级生产力(NetPrimaryProductivity,NPP)的影响。结果表明:①自然因素和人类活动的共同作用导致研究区汾河流域的生态环境发生变化;②气象因素综合对NPP的发展起到了正向的影响,NPP的变化对降水呈现出较好的正相关性,而对温度则呈现出负相关性;③人类活动综合对NPP的发展起到了正向的影响,与气象因素相比,人类活动对NPP变化的影响程度较大。自然因素和人类活动共同促进了汾河流域的生态环境发展,人类活动对汾河流域生态环境的良性发展起到了重要作用。

In order to research the changes of the ecological environment in the Fenhe River Basin,the light energy utilization model CASA was used to analyze the impact of climate factors and human activities on the Net Primary Productivity (NPP ) of the Fenhe River Basin during 2000-2015.Results show that:(1 ) The combination of natural factors and human activities led to changes in the ecological environment of the Fenhe River Basin in the study area;(2 ) Meteorological factors have a positive impact on the development of NPP,and the changes of NPP show a good positive correlation with precipitation and a negative correlation with temperature.(3 ) Human activities have a positive impact on the development of NPP.Human activities have a greater impact on NPP changes compared with meteorological factors.Natural factors and human activities have jointly promoted the ecological environment development of the Fenhe River Basin.Human activities have played an important role in the benign development of the ecological environment of the Fenhe River Basin.