Study On The Regionalization Of Gansu Ziwuling Nature Reserve

Ziwuling forest region is the biggest natural secondary forest region in the middle of the loess plateau,is the Yellow River valley main water source self-control forest region,which has the extremely crucial significance to stabilize the water quality and the water volume of the Yellow River,and suppressing Gansu pearl,that is Dong Zhiyuan,the plateau surface cutting.The establishment of Ziwuling natural protection area will make the Ziwuling forest ecosystem and the zoology and botany resources obtain effective protection,recovery and development,will enhance the stability of natural ecosystem,will avoid the ecology being out of balance and the species degeneration,will display the more mighty ecological function,will provide the mighty support for the region social and economic development.At the same time,we construct the protectorate into important scientific research base of natural secondary forest and the species gene bank of wild animal and plant resources in the loess plateau upland.Through investigation and the analysis on-the-spot of Gansu Province Ziwuling natural environment which of forest region geographical position,geological physiognomy,climate,soil quality,rivers system as well as zoology and botany resources and so on,and integrating the region social economy and the forest resources condition,carries on the division research of the Ziwuling forest region of 502,000hm~2.It shows that: 1,The wildlife species of Gansu Ziwuling forest region is various.There are 47 families,96 genus and 222 species of Xylophyt,about 1,000 families of herb;there are wild vertebrate 24 item,61 families,156 species.In addition,they also include many species of the bryophytas and the wild fungus.Paeonia rockii in Xylophyt is state-level key protection plant.2,Mainly protecting objective is the loess plateau natural secondary forest ecosystem.3,The natural protection area establishment in Huachi,Heshui,Xiangle, Zhengning of Ziwuling forest region,that is 4 total places governs the forest region core land sector,these region protecting object relative concentration and the biodiversity abundant degree high may satisfy the protection and the research of main protection objective,that is the loess plateau natural secondary forest,its total area is 242106hm~2.4,In terms of guiding ideology,the principle and the basis of function area division,the natural protection area is divided into 3 function area of the core area,the buffer area and the experimental area,and the core area consists of 4 mass,total area is 70705.5 hectare and is 29.20%of the total protectorate area.The buffer total area is 47379.4hm~2 and is 19.57%of the total protectorate area.The experimental is 124021.2hm~2 and is 51.23%of the total protectorate area.5,The characteristic of Ziwuling natural protection area:Ziwuling is the biggest natural secondary forest region of the middle of our country loess plateau,which has the strongly representation in the domestic biological climatic zone;Natural secondary community of Ziwuling forest region is young,is at the non-steady state, the species and the habitats type is multiplicity,can fully reflect its unstable succession characteristic of ecosystem.