Studies On Plant Diversity And Conservation In Puwa Nature Reserve Of Beijing

In this dissertation, plant biodiversity in Puwa nature reserve is analyzed with field survey on plant species and forest vegetation, the results show that: The vascular plants in Puwa nature reserve include 552 species (variation) which belong to 331 genera, 100 families. The flora geographical composition are complex, the dominant characteristics of flora are temperate zone plants. In this region, the plant vegetation was classified into 32 associations , which belong to 3 groups of vegetable types and 5 vegetation types and 22 forms, the widest distribution is Carpinus turczaninowii community. Based on the calculating of α diversity and β diversity, the causation of difference of plant diversity betweeen forest vegetations is analized. Calculating the value of forest resources, we can see that the total value of forest resources in Puwa nature reserve is 600. 2058 million RMB, in which the eco-benefit value is 567.4779 million RMB that occupy 94.55 percent and the value of forest area and wood is 18. 4279 million RMB that occupy 3. 07 percent. Evaluating the threatened hierarchy of plants in Puwa nature reserve, the results show that the number of critically endangered species is 6, endangered species is 18, vulnerable species is 17, near threatened species is 43, safty species 419. Sequence of preferential protection of associations and the distribution of forest resources is analyzed, the result indicate that primary forest include Quercus liaotungensis, Carpinus turczaninowii , Juglans mandshurica and Pteroceltis tatarinowii. The core region of the nature reserve is 2608. 3hm~2, the bufferregion is 1978. 7hm~2 and the experimental region is 809. 5hm~2.