Study On The Ecological Pattern And Ecological Control Line Of The Minjiang River Basin

From the earth's ecological system science,the atmosphere,water,biology,geology,human activity and the mutual influence the interaction between ecological environment and land use/land cover is one of the main embodiment of the comprehensive action.Ecosystem service function is one of the important indicators,ecosystem quality for human survival and ecological balance plays a vital role.In recent years,along with the construction of a series of development activity increasing and chaotic spread,ecological security is facing huge pressure.The ecological condition of quantitative and spatial dynamic monitoring,and the "bottom line"ecological security and ecological resources "baseline" research become the focus and hot spot.This paper analyzes the quality in 2000,2005,2010 in Minjiang river basin ecological pattern in Minjiang basin,biological diversity,ecological service function,service function of carbon sink of soil conservation service functions defined in Minjiang River Basin in 2010 based on the analysis of ecological control line,and the overall ecological condition in Minjiang basin is divided into space,comprehensive,quantitative,as follows:1.Through the ecosystem types and composition analysis of ecological system,ecological system type conversion feature analysis,pattern analysis,quality analysis of forest types of Minjiang River Basin in recent ten years,that the whole ecological system without drastic changes,to maintain the basic stability of the ecological system,the conversion of the smaller,but the land cover types have continued to deteriorate.Humans take up space volume increase.Forest area accounted for by a larger growth,the growth rate was 0.69 percentage points,the forest coverage has decreased,but the overall is still in a state of high level,the whole forest landscape fragmentation in the lower,more.2.Based InVEST models Biodiversity Module,measured Minjiang River Basin species diversity of ecological services,using the Ecological Quality Index and the Ecological Rarity Index reflects the evaluation of ecological environment quality of Minjiang River Basin.The results show that,during 2000,2005,2010,Minjiang River Basin's ecological quality index scores were 27.90,27.82,27.79.Tajiang District,Gulou District,Cangshan District,Changle Districtk,Mawei District are the region of lower ecological quality.Road,Residence,Industrial Land,Mining Disturbance to the ecological environment is the main driver of change in habitat quality.In 2000-2010 scarce,Forest ecosystem's Ecological Rarity Index fell 89.80%,the average of the Ecological Quality Index was 0.99,the area increased 0.09%.3.Calculation of net primary productivity of Minjiang River Basin Based on the total amount of carbon sink and carbon flux,2000-2005 carbon amount is reduced by 33.32%,the total amount of carbon sink of 2005-2010 increased by 98.71%,ten years,the overall increase of 32.71%.The carbon flux between carbon sink and carbon source,carbon source area is reduced by 1866.032km2 for ten years,reduce the rate of 2.92 percentage points,carbon sink area increased by 5301.34 km2 for ten years,the area accounted for 8.29 percentage points higher than the increase.rate.4.The universal soil loss equation(USLE)based on the calculation of Minjiang basin in 2000,2010 the soil conservation service,In 2000 the average stay was 1477.8 t/km2,2010 years maintained an average weight of 1477.98 t/km2,the overall upward trend,the change rate of only 0.01%,in a steady state.5.Delineation of Minjiang river basin ecological control line,divided into very important,highly important,important,more important is generally moderate,five grades,each area were 188.69km2,9247.44 km2,18852.5 km2,22085.56 km2,13438.94 km2.