关键词: 浙江楠群落, 主要种群, 生态位宽度, 生态位重叠, 三清山

Abstract: The niche characteristics of 9 tree species of Phoebe chekiangensis community in Sanqingshan Mountain were analyzed. The niche breadths and niche overlaps of main species in the community in the sample plot were measured by using Shannon-Wiener index and Hurlbert index. The results showed that the niche breadth of Phyllostachys heterocycla, Liquidambar formosana, Trachcarpus fortunei and Phoebe chekiangensis were bigger，which of Pterocarya stenoptera, Camellia oleifera, Castanopsis sclerophylla, Armeniaca mume and Cyclobalanopsis glauca were smaller. The niche overlap of Cyclobalanopsis glauca and Castanopsis sclerophylla was the biggest among all of species, Phyllostachys heterocycla or Liquidambar formosana and Armeniaca mume was the least. The wider of niche breadth, the higher capability of adapting environment, the more powerful capability of utilization resources. The niche overlap among species was higher, the niche similarity between species was greater, similarity of utilization resources was more powerful. The niche overlap between species with broad niche breadth was generally greater, which between species with narrow niche breadth was greater in the same or similar environment requirements, which between species with broad and narrow niche breadth was smaller.

Key words: Phoebe chekiangensis community, main populations, niche breadth, niche overlap, Sanqingshan Mountain