Point pattern analysis of rare and endangered plant Camellia nitidissima Chi
Camellia nitidissima Chi, an evergreen understory shrub or sub-tree, is a rare and endangered ornamental species, and its distribution is very narrow.Based on the investigation data from a l hm2 secondary forest plot in the Fangcheng National Reserve of Guangxi, South China, and by using uni-and bivariate analyses of paired correlation function g (r), this paper studied the distribution pattern of C.nitidissima and its spatial association with dominant species.The size distribution of the C.nitidissima population showed an invert J-shape, indicating that the C.nitidissima population was in a stable and normal growth status.C.nitidissima was significantly aggregated at scales ＜25 m, and the aggregation intensity weakened with the increase of scale.C.nitidissima showed a significant spatial correlation with most of the other main tree species (accounting for 88％) on different scales, which was stronger than the spatial correlations between the top five trees and the 25 main trees in the plot.What' s more, the significant negative correlations between C.nitidissima and the main tree species accounted for 60％, which were obviously greater than the significant positive correlations, indicating that the way the C.nitidissima utilized resources was different from the majority trees in the plot.Six main species which located in the middle and upper layers of the community showed significant positive correlations with C.nitidissima, implying that they created suitable understory environment for the survival of C.nitidissima.
secondary forestpair correlation function g(r)spatial patternspatial association
国家科技期刊平台
NSTL
万方数据
维普
