Tree species diversity and related mechanism in an evergreen broad-leaved forest in Ailao Mountains, Yunnan, China

Content Provider	Semantic Scholar
Author	Gong, Hede Hu, Xiao Yang, Xiaojun
Copyright Year	2013
Abstract	2 plot was established in Ailao Mountains State Nature Reserve for the purpose of monitoring long-term dynamics of tree populations. All free-standing trees with diameter at breast height ( DBH ) ≥ 1 cm were tagged, mapped, measured (girth) and identified to species in the plot. The spatial distribution patterns of four dominant canopy tree species in the plot were analyzed using a point pattern analysis Ripley's L-function. A total of 12131 free-standing individuals with DBH ≥ 1 cm were recorded in the plot, including 68 species belonging to 49 genera and 25 families. Lithocarpus hancei had the largest basal area and the largest importance value. Camellia forrestii , an understory tree species was ranked the second in terms of importance value, although it showed the highest abundance (1712 individuals). The four canopy dominant species had a large number of seedlings and saplings and tend to be patchily distributed. And the spatial distributions of 26 tree species with ≥40 individuals was examined at each life history stage (diameter at breast height ≥1 cm), and 37 of 57 life history stages showed aggregated distribution pattern. It showed that it may be not density dependence but habitat heterogeneity as a prevalent mechanism for regulating the population spatial structure of most tree species in the subtropical forest studied here.
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Language	English
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Resource Type	Article