Evaluation on the importance of biodiversity maintenance function in the Heilongjiang Province based on net primary productivity
Based on the optical utilization rate model,using biomass,elevation,climate and other evaluation factors,the net primary productivity (NPP)of vegetation in Heilongjiang Province from 2000 to 2020 was estimated,and the temporal and spatial change characteristics of NPP of vegetation in Heilongjiang Province were analyzed.On this basis,the importance of biodiversity maintenance function in Heilongjiang Province from 2000 to 2020 was assessed and graded,and the spatial-temporal distribution characteristics of biodiversity maintenance function in Heilongjiang Province were analyzed in combination with the interannual changes of key climate factors.The results showed that:(1)The growth trend of vegetation in Heilongjiang Province was positive,NPP increased by about 20％ in the past 20 years,and the quality of species habitat environment was improved.(2)The biodiversity maintenance function of Heilongjiang Province has been steadily improved,especially in the past five years.Since 2000,the areas with important and extremely important biodiversity maintenance functions have increased by about 15％,including about 5％ in recent five years.(3) The distribution of biodiversity maintenance functions in Heilongjiang Province has significant spatial heterogeneity characteristics,showing a gradual increasing trend from south to north and from east to west in space. The important and extremely important areas account for 33.5％,mainly distributed in Harbin,Mudanjiang,Yichun,Jiamusi and the west of Hegang.They should be regarded as the key areas of biodiversity conservation.At the same time,the biodiversity conservation capacity of different ecosystem types is different.Forest land,cultivated land and grassland are the main contributors to the biodiversity conservation function.To sum up,biodiversity maintenance function evaluation based on vegetation NPP with high spatial resolution can effectively identify regional biodiversity maintenance function distribution characteristics,accurately locate key biodiversity protection areas,and provide technical support for scientific management of regional ecological environment.
biodiversitynet primary productivitypatternHeilongjiang Province
万方数据
维普
