Evaluation And Impact Mechanism Of Tourism Ecological Security Of Yangtze River Economic Belt Based On DPSIRM-SBM Model

Under the strategic consensus of global sustainable development,with the rapid development of tourism,the contradiction between economic growth and ecological security has attracted much attention.Facing the transformation of the main social contradictions in our country,it is the direction of the whole society to vigorously build ecological civilization and take the road of sustainable development.Tourism ecological security describes the health state of tourism ecosystem and can make important reference for the sustainable development of tourism.Based on this,this paper takes 108 prefecture-level cities in the Yangtze River Economic Belt as the research object,defines the tourism ecological security in a broad sense based on ecosystem health theory,sustainable development theory and system theory,and combines with the analysis of existing literature.Then the DPSIRMSBM evaluation model is introduced to evaluate the tourism ecological security of the Yangtze River Economic Belt from 2011 to 2020,and its temporal and spatial evolution characteristics are explored by using kernel density analysis,local Moran index,standard deviation ellipse and gravity center analysis,and the Tobit model is used to analyze the influence mechanism of the tourism ecological security of the Yangtze River Economic Belt.The study found that:(1)On the whole,the level of tourism ecological security in the Yangtze River Economic Belt is not high,with the average value fluctuating between 0.43 and 0.57,and the security level is between sensitive level(Ⅲ)and general security level(Ⅴ).The tourism ecological security index in the downstream area is between 0.41 and 0.59,and the security level is between sensitive level(Ⅲ)and general security level(Ⅴ).The tourism ecological security index in the middle reaches is between 0.34 and 0.48,and the security level is between risk level(II)and critical security level(IV).The tourism ecological security index in the upstream area is between 0.33 and 0.65,and the security level is between risk level(II)and general security level(V).(2)The regional differences of tourism ecological security in the Yangtze River Economic Belt first increase and then decrease,which accords with the unbalanced growth theory.Among them,2017 is an important node for regional differences.(3)The tourism ecological security of the Yangtze River Economic Belt has generally formed a spatial pattern of "strong at both ends and weak in the middle".Specifically,the downstream areas generally show the distribution characteristics of "high in the south and low in the north";The middle reaches changed from "high in the south and low in the north" to "high in the east and low in the west";The middle reaches show a development pattern of "from point to surface".Its common feature is that the level of tourism ecological security at the junction of provinces is often high.(4)The tourism ecological security in the Yangtze River Economic Belt shows U-shaped distribution characteristics in the east,west,south and north directions,and the U-shaped distribution characteristics in the east-west direction are more obvious.In a word,the advantage of ecological security of tourism in the west-south direction is obviously higher than that in the east-north direction.(5)The local agglomeration characteristics of the Yangtze River Economic Belt mainly change from high-high value agglomeration in the downstream areas to low-low value agglomeration in the middle reaches.There is a risk tendency and a certain polarization phenomenon in tourism ecological security.(6)The tourism ecological security in the Yangtze River Economic Belt shows an obvious distribution pattern in the direction of "northeast-southwest".Generally speaking,the center of gravity is constantly shifting from east to west,and the spatial pattern is deflected to the northwest in stages with a small change range.(7)The scale of tourism economy and the regulation of tourism environment have a significant positive impact on the ecological security of tourism in the Yangtze River Economic Belt,while the level of local economic development has a significant negative impact.There is no significant impact on the tourism industry structure,tourist consumption level,tourism economic development level,and tourism economic regulation.The article helps to gain a more accurate,comprehensive,and clear understanding of the security and risk status of regional tourism ecosystems,providing relevant information for the managers,and providing new theoretical and empirical references for research in related fields.