Studies On The Niche Of Schima Superba Gardn In Fengyangshan Nature Reserve

Fengyangshan Natural Reserve is the highest and largest nature reserve to protect typical subtropical forest ecosystem in Zhejiang province, and it is the critical region to open the flora origin and evolution in East China. Through the community survey in Fengyangshan Nature Reserve, choosing30different elevation and location plots of Schima superba Gardn forest,using the survey data and the existing local information, to determine and research on the niche, the structure and distribution of the Schima superba Gardn forest. The main results showed:(1) Schima superba Gardn trees are unevenly distributed in every age class, the proportion of the middle age tree was the largest, the age structure of the population was growing, the population number was showing the growing trend. Schima superba Gardn populations in different succession stages of growth and equally distributed situation, overall show cluster distribution. From the point of dynamic evolution perspective, the populations have forward trends, they with other advantages populations will become the top stable community together. Understanding of Schima superba Gardn population growth structure dynamics and distribution pattern, is of great significance for Schima superba populations tending management and protection.(2) Study on the30different elevation and location plots of Schima superba Gardn forest and18dominant species, we can find the niche breadth of Schima superba Gardn was the first,its advantageous position was far stronger than other species; the proportions of niche overlap of Schima superba Gardn were moderate, this means Schima superba Gardn for each resource position were not obvious, and they with other species can reach a state of relative balance; the proportion of niche overlap and the niche similarity are the same trend. Although the occurrence of community species are random events in the nature, if they want to become dominant populations, which is a group of long-term adaptation and competition as well as environmental selection results.