Abstract:

Five plots of 1 600 m² including 320 contiguous grid quadrats in Luo Boyan Nature Reserve in Fujian Province were investigated and analysed to reveal size structure and spatial distribution pattern of Phoebe bournei population.The results indicated that P. bournei population structures at five plots were obviously different,but all in pyramid shape.P. bournei population in this area was steadly increasing, or maturing with about 10 803 seedlings·hm^-2 input.Mortality rate was about 82.3% from class Ⅰto class Ⅱ.Aggregate intensities of P. bournei population were different in communities of two types;Spatial distribution patterns in growth phases were effected by enviromental conditions,e.g.light level,slope gradient,and quadrat size.Factors causing the decrease of population were briefly discussed and protection measures were proposed.

Key words: P. bournei, Population structure, Spatial distribution patterns