Research Of The Restoration Effect On Herbaceous Marsh In Hilly Region Based On The Evaluation Of Ecosystem Service Function

Da-xiao-xing’anling Mountains and Changbai Mountains in Northeast China has a special type of marsh:marsh in hilly region.This type of marsh is rich in biological resources,peat resources,water resources and tourism landscape resources,which can be described as"water tower","carbon pool"and"cold region biodiversity protection base"in Northeast China.Regional peat mining,drainage and farming and other activities have led to the degradation and loss of marsh resources,which have already attracted the attention of the national and local governments.Since 2010,the ecological restoration project of marshes have been gradually started in Jilin province,tried to restore damaged and degraded habitats marshes.(1)After evaluation,the paddy field constructed marsh has the strongest material production function and supply service(62710 yuan/hm~2).The restored marsh has the strongest water conservation function(19934.07yuan/hm~2),and the biological support services,regulation services,and cultural services ecological value of natural marsh stronger than the first two.In terms of total value,the three show the law of restored marsh(155898.92yaun/hm~2)<paddy field constructed marsh(228591.62yuan/hm~2)<natural marsh(310593.62yaun/hm~2).(2)The"artificial water supplement and natural restoration"model is adopted to restore marshes in hilly region.After 10 years of restoration,the effect isobvious:The value of the supply function,support function,adjustment function,and cultural function of restored marsh has reached 2480 yuan/hm~2,26270.01yuan/hm~2,118392.96 yuan/hm~2,8755.95yuan/hm~2,of which the value of support services and cultural services is significantly higher than that of paddy field constructed marsh.The support function accounts for 16.85%of the total value,which is the highest among the three types of marshes.The water conservation function is also stronger than the natural peat marsh as the end point of restoration.(3)"Ecosystem service index evaluation system of marsh in hilly region"constructed in this paper is scientific in selection and weight assignment,which is not only in accordance with applicability,but also reflects the dominant function value.The evaluation of the effectiveness of marsh in hilly region restoration should focus on the three functions of carbon fixation and oxygen release,water conservation and biodiversity support.To facilitate rapid detection,four indicators such as soil organic carbon,soil bulk density,soil saturated water content and species richness can be selected as simplified indicators for long-term monitoring.The research shows that the restoration of the restored marsh in the study area has achieved phased results,but there is still a big gap in the function of the restored marsh for 10 years compared with the natural marsh.Therefore,attaching importance to the protection of natural marsh in hilly region is the most fundamental guarantee for exerting its ecological service functions efficiently.