Research On Forest Ecosystem Management In Tibet Based On Ecological Security Evaluation

In response to the strategic requirements of the country’s sustainable development,strengthen the construction of ecological civilization,rationally develop natural resources,and achieve the goal of coordinated development of the natural social-economic-ecological complex system.As the largest terrestrial ecosystem,effective systematic management of forests can not only reduce the occurrence of forest ecological and environmental problems,but also ensure the continuous supply of forest ecosystem services,systematize natural resource management,improve regional ecological environment,and promote forestry.sustainable development.Based on ecological security assessment and forest ecosystem management research,this paper summarizes the research status of forest ecosystem management and ecological security assessment,expounds the principles,contents and management steps of forest ecosystem management,and analyzes the relationship between forest ecosystem management and traditional forest management.Relationship.The research takes the forest ecosystem of the Tibet Autonomous Region as the research object,combines the PSR（pressure-state-response）model,selects the indicators through the principal component analysis method and the literature analysis method,and constructs the forest ecological security evaluation index system in the Tibet Autonomous Region;uses the entropy weight method to determine the indicators weight,and calculate the forest ecological security index in each year to evaluate and analyze the forest ecological security status of the Tibet Autonomous Region from 2005 to2019.The exponential smoothing method is used to predict the data of each indicator from 2020 to 2024,analyze the main factors affecting forest ecological security,and finally propose forest ecosystem management countermeasures.The results show that:（1）The status of forest resources is the main factor that determines forest ecological security;the pressure on environmental resources is the main factor in the assessment of forest ecological security.On the whole,the weight of positive indicators is greater than that of negative indicators,indicating that the positive impact of human activities on forest ecological security is greater than the negative impact.（2）During the study period and forecast period,the overall assessment results of forest ecological security showed a downward trend,which was roughly the same as that of the forest ecological status assessment.The assessment of forest ecological pressure was not much different in the research stage,and showed a downward trend in the prediction stage.The forest ecological response assessment has a clear upward trend during the study period,and during the forecast period,it will decrease in 2020-2022 and improve again in 2023-2024.（3）Based on the analysis results of forest ecological security assessment and the obtained forest ecological security influencing factors,relevant countermeasures and suggestions for forest ecosystem management are put forward in a targeted manner.