Analysis change of vegetation net primary productivity and its driving force in different eco-geographical zones on the Loess Plateau
To support the application of precision ecological restoration projects on the Loess Plateau and the formulation of regional sustainable development policies,the changes of the net primary productivity(NPP)of vegetation in different ecological geographic regions on the Loess Plateau under the coupling influence of economic development,as well as ecological engineering and climate change after the"returning farmland to forests"project were focused.For this purpose,long-term series(2000-2015)data on land use,vegetation net primary productivity,meteorology,etc.were collected at first,and methods such as trend analysis to study the changing laws of NPP in various ecological geographic regions of the Loess Plateau were used.Then,the driving forces leading to vegetation NPP varieties in different eco-geographical zones were analyzed using land transfer matrix analysis and correlation analysis methods.The results showed that the changing trends of NPP in different eco-geographical zones of the Loess Plateau were different,because of differences in climate change and ecological engineering for different eco-geographical zones;most eco-geographical zones'NPP were mainly affected by climate change,and a few eco-geographical zones were affected by the coupling effect of climate change and ecological engineering.In the eco-geographical zones,where ecological restoration projects is the main factors of NPP changes,the impact of ecological restoration project is mainly reflected before 2010,and there exist differences in the selection of suitable recovering vegetation types.
万方数据
维普
