Grassland Resource Characteristics And Ecological Security Evaluation In Fujian Province

With the development of social economy,human activities are increasingly intensified,and the blind exploitation and utilization of grassland resources lead to grassland degradation,desertification and other ecological environmental problems,thus posing a threat to the stability of grassland ecosystem,which has become a serious problem facing the world today.This study using remote sensing,geographic information system and the theory of landscape ecology,nine districts in the city of Fujian province as the research object,based on remote sensing image data and field investigation,from the landscape pattern,terrain distribution,plant community and ecological safety evaluation study of the characteristics of grassland resource in Fujian province and its ecological security status,using the landscape index and spatial autocorrelation to discuss the spatial structure of grassland resources and its distribution characteristics,through the terrain distribution index,Pearson correlation analysis to investigate the relationship between the distribution of grassland and terrain factors,such as field investigation of the typical grassland plant community characteristics of grassland resources,and connecting with the grassland resources ecological security status.The countermeasures of rational exploitation and utilization of grassland resources in Fujian province were put forward in order to provide scientific basis for future exploitation and utilization of grassland resources and development planning of grassland industry in Fujian province.The results showed that the grassland resources in Fujian province were mainly scattered with obvious characteristics of fine fragmentation.The fragmentation degree,shape complexity and aggregation degree of grassland patches in Xiamen,Zhangzhou and Quanzhou were all at a low level.H-H and L-L are two spatial autocorrelation types in the distribution of grassland in different districts and cities.Based on the correlation analysis of grassland distribution and topographic factors,elevation and slope direction are the main topographic factors influencing the distribution of grassland.According to the field investigation of typical grasslands,ecological conservation function is the main function of grassland resources,while grazing and tourism are the main utilization methods of grasslands.The grassland is dominated by grasses,leguminous plants are less distributed and of low quality.Through the evaluation and analysis of the ecological security of grassland resources,the comprehensive ecological security index of the whole province is 0.386,and the ecological security status is general.Moreover,the ecological security level of grassland resources in inland areas is higher than that in coastal areas.The grassland ecological environment in Fujian province is disturbed or damaged to some extent.The stability and integrity of the ecosystem structure are general.There are ecological environmental problems and ecological disasters in local areas.