Evaluation System Of Conservation Priority For Secondary Natural Units (Valleys) In Liancheng National Nature Reserves

To judge the protection grade and order of all levels of diversities is very important for efficiency biodiversity protection. The valleys are mainly built by geologic history and hydrology, their natural characters can reduce the subjective factors in biodiversity assessment compared with the traditional evaluation units such as the regions, nature reserves and communities. It is helpful to build more pertinence management and protection measures. To build the evaluation index systems of conservating priority for the valleys to investigate high efficiency and high quality conservation methods and basises, secondary nature unites of the nature reserve were selected as the main research objects, the experts consultation method, theoretical analysis method and frequency concept method were integrated, 32 qualitative indexes and 43 quantitative indexes were analyzed and then high frequency indexes were selected. Taking Liancheng National Nature Reserve for example, primary valleys were analyzed and compared. Conclusions were made as following by Principal Components Analysis Method.(1) Priority of conservation system of the secondary natural units in nature reserve was built by three layers including 19 indexes. It was mainly used for the conserves of mountain regions, mountain forests or the valley-mountain insections, but was not suitable for grassland conservation. Since valleys themselves were selfsimilar, this system was suitable to the downward of the primary valleys or other nature unites which had the same characters. It provided new idea and evaluation scale for priority of conservation for biodiversity.(2) As valleyes were the nature unites in conserves, there were differences for scales, Concept for comprehensive values of spieces diversities for valleys was given and new formula was established. F_K represented the comprehensive values of species diversities for some community, n represented the numbers of F_K in each valley, S represented the areas of each valley, B represented the comprehensive values of species diversities for valleys.(3) There are 16 kinds of community type in Liancheng National Nature Reserve, Picea wilsonii had the highest priority of conservation, others in order were: Betula albo-sinensis, Spiraea salicifolia, Rhododendron simsii, Picea crassifolia, Berberis kansuensis, Betula utilis, Pinus tabulaeformis, Cotoneaster submultiflorus, Betula platyphylla, Sabina przewalskii, Populus davidiana, Rhamnus davurica, Potentilla fruticosa, Caragana sinica, and Salix spp.(4) Priority of conservation of species diversities for valleys in Liancheng National Nature Conserve by comprehensive evaluation was: Gangzi, Zhulin, Quhongtu, Xiaoxinger, Xiaxi, Pengzi Tulu Tiecheng, Xiaognagzi, Zhinanbei, Jingzhi, Shangxi Shuimo, and Sudu valley.(5) Priority of conservation of landscape diversities for valleys in Liancheng Nation Nature Conserve by Comprehensive Evaluation was: Quhongtu, Xiaoxinger, Zhinanbei, Tiecheng, Xiaogangzi, Gangzi, Shangxi, Tulu, Pengzi, Zhulin, Xiaxi, Jingzhi, shuimo and sudu valley.(6) Priority of conservation by comprehensive evaluation of forest resources to secondary natural units was: Zhulin, Quhongtu, Xiaoxinger, Pengzi, shangxi, Zhinanbei, Gangzi, Xiaogangzi, Xiaxi, Tulu, Jingzhi, Tiecheng, Shuimo and Sudu valley.(7) Fitting 3 factors of the comprehensive value of species diversities, value of landscape diversities and value of forest resources for valleys. The priority of conservation for valleys in Liancheng National Nature Conserve was: Quhongtu, Xiaoxinger, Zhinanbei, Gangzi, Zhulin, Xiaogangzi, Tiecheng, Pengzi, Shangxi, Tulu, Xiaxi, Jingzhi, Shuimo and Sudu valley.