Ecological Risk Assessment Of Fujian Coastal Area Based On Landscape Structure

Fujian is located on the southeast coast of China.The geographical position is superior and the ecological environment is complex.With the rapid expansion of urbanization and the accelerated development of the economy,the contradiction between people and land is prominent,leading to coastal areas.The ecological environment of the zone is more fragile.The ecological risk assessment of Fujian coastal area based on landscape structure is of great significance for achieving a higher level of harmonious and stable development in coastal areas.From the perspective of landscape structure,this paper uses ArcGIS and Fragstats software to construct an ecological risk assessment model based on the loss and vulnerability of ecological landscape in coastal areas,and uses geostatistical analysis and spatial autocorrelation analysis methods to explore the study area.The ecological risk distribution characteristics and the spatial correlation of ecological risks,and propose corresponding management strategies.The main conclusions are as follows:(1)Forest land,cultivated land,construction land area proportion is the largest,coastal ecological land use,agricultural land,urban construction land is more,abundant agricultural and ecological resources,fast urbanization and the increase of land for construction mainly rely on cultivated land,forest land,shrub,grassland into,into a58027.19 hm2,17103.36 hm2,respectively 10555.44 hm2,12466.21 hm2.(2)2000-2013,the construction land area increased the fastest,grassland,shrub and unutilized land decreased faster,tidal flat decreased slower,farmland decreased faster,comprehensive dynamic attitude of land use increased,and the two-way nature of land use change was enhanced,and land use change became increasingly complex.(3)2000-2013 study,great changes have taken place in the landscape pattern in the area of construction land,forest land and water area is on the rise,shrubs,grassland,cultivated land,the area of the tidal flats or unused all showed a trend of decline,and reduced Numbers of plaque,fragmentation degree deepening,biodiversity decrease,and the construction land fragmentation and isolation is falling,geographical distribution gradually tend to be concentrated,damage degree of decline,the grim situation of ecological environment.(4)During the study period,low,low ecological risk level area increased volatility,ecological risk level in the area of increased faster,high ecological risk level area is reduced by 5.42%,the ecological environment is slightly better,but the higher and higher level for a larger proportion,the ecological environment vulnerability is still relatively high,need to strengthen ecological environment construction,(5)2000-2013,fujian coastal ecological risk change is more obvious,but the ecological risk level is roughly into north and south direction of regular zonal distribution of article,coastal ecological risk is higher than the medial side,the south is higher than the north,north of luoyuan,south of lake kasumigaura,makes,roller,ZhaoAn change is bigger,koh larn gaps development zone to change liang-fon estate located on the southbelt,outside-in followed by high,high,medium,low,low ecological risk level distribution.The area of the ecological risk level was reduced by 3.2 times of the increase,and the ecological environment was relatively stable with the transfer of high and high ecological risk levels to lower ones.(6)During the study period,the moran index was 0.7986,0.8249 and 0.6608,respectively.The distribution of ecological risks had strong global positive correlation in space.From the cluster analysis,it can be concluded that the ecological risks in the study area were mainly manifested as the aggregation of L-L and H-H.The distribution of L-L is mainly distributed in the north,showing the change process of dispersion-agglomeration-agglomeration,and H-H is mainly distributed in the south,showing the change trend of agglomeration-agglomeration-dispersion.According to the spatial distribution of ecological risk and the actual situation of the region,the corresponding risk management countermeasures are proposed.