Research On Evaluation Of Forest Ecosystem Services In The Daba Mountain Nature Reserve,China

Forest ecosystem is the main type and important component of natural ecosystem,and its service function is the foundation for support and maintenance of the earth’s life support system,at the same time can also provide maintaining human survival indispensable important resources,plays a decisive role,thus objectively and accurately assess forest ecosystem service function,for the scientific implementation of forest resources management and protection of ecological environment has important practical significance.This article refer to the state forestry administration of the forest ecological service function assessment standard "(LY/T1721-2008),in chengkou county forest resource survey data as the data source,in dabashan mountain nature reserve as the research object,the selection of water conservation,leisure,recreation,carbon oxygen release,and purify the air,soil conservation and maintenance of biological diversity and other six function 10 indicators,to evaluate the regional forest ecosystem services.The following conclusions are drawn:(1)The daba mountain nature reserve forest ecosystem service function value is 11.3377259 billion yuan.The direct utilization value reaches 76558.31 million yuan,accounting for 6.75% of the total value,in which forest resources value 5.12%,recreational value 1.63%;and the indirect utilization value reaches 1057214.28 million yuan,accounting for 93.25% of the total value,in which water conservation value accounted for 70.00%,carbon oxygen release value 13.21%,purify air value 3.17%,soil conservation value 3.33%,maintaining biodiversity value accounted for 3.54%.And the indirect utilization value is far greater than the direct utilization value.(2)According to the value of ecosystem services of different vegetation ty pes,the value of broad-leaved forest is the highest.The ranking of ecological service value of different vegetation types is Broad-leaved forest>Needle broadmixed forest>Coniferous forest>Shrub>Sparse woods.The highest value of the e cological service of the unit area is the mixed forest.(3)In the arbor and opening,from the point of different forest age ecosystem services value,dabashan mountain forest ecosystem service value is given priority to with mid-maturation forest,showing Middle-age plantation>Young growth forest>Near-mature forest>Mature forest>Overmature forest.Although the ecological service value of overripe forest is the smallest,the ecological service value of its unit area is the highest.(4)In terms of the value of ecosystem services of different species of tre es,the value of ecosystem services of different tree species is also significantl y different from the value of ecosystem services of different species of trees.Order quantity according to the size of Quercus>Pinus massoniana>Pinus arman dii>Castanea seguinii Dode>Populus tremula>Birch>Cedarwood>Larix gmelinii>P inus tabuliformis>Platycarya strobilacea>White poplar>Dawn redwood>Other con ifers>Cypress>Cryptomeria fortunei>Schima superba>Maple>Betula Platyphylla>L iquidambar formosana Hance=Pterocarya stenoptera.But the unit area ecosystem service ability is stronger for the fir,willow and other conifer species.