Research progress on the mechanism of ecosystem services generation
In recent years,the generation of ecosystem services (ES) and its underlying mechanism has become one of the hot topics in ecology.After Millennium Ecosystem Assessment (MA)held in 2005,pertinent studies of ES,such as the classification,valuation,trade-offs and synergy,delivery and flow of ES increased rapidly.The research on ES has entered the new phase.However,to know ES better and explore much deeper,it is essential to disentangle the mechanism of ES generation.Existing literatures indicate that there is still no appropriate research paradigm in this area.In this article,previous works both at home and abroad were reviewed.Then,literatures in recent ten years that directly related to the mechanism of ES generation were summarized.From two points of view,which were intrinsic and extrinsic factors,the roles that biodiversity and human-involved activities playing in the process of ES generation were emphatically analyzed,and the proposed research in the future was prospected.