Wang Zhenhong, Duan Changqun, Yang Jiansong
College of Life Science, Guizhou University, Guiyang, China.
Ying Yong Sheng Tai Xue Bao. 2006 Sep;17(9):1583-7.
To analyze the relationships between plant diversity and community structure of semi-humid evergreen broadleaved forests at different secondary succession stage in the Samachang area of Yunnan Province, some numeral indices were tested, and the results showed that the plant diversity increased gradually with succession, and the species number reached 24 at the latest succession stage. There was a positive linear correlation between plant individual density and species diversity, which could be described by y = 506. 99x + 554.56. A negative correlation was observed between the average height of plant individuals and plant species diversity, and the equation y = -0. 3862x + 11.406 could describe it well. The crown density and basal area increased in logarithm with plant species diversity, and the two equations y = 21.756 1n x + 11.607 and y = 7.4028 ln x + 9.6198 could describe the relations. No regular patterns were observed for the changes of aboveground biomass and plant individual density with plant species diversity. The relations of plant species with plant individual number could also be described by negative power function. Plant competition was intensified with plant species diversity, and each plant species might take the strategy to conserve its greatest population, and to avoid decreasing to less than its critical population, which led to a high individual density, and might change the structural character of the community.
为分析云南省三岔河地区不同次生演替阶段半湿润常绿阔叶林的植物多样性与群落结构之间的关系，对一些数值指标进行了测定，结果表明，植物多样性随演替逐渐增加，在最晚演替阶段物种数达到24种。植物个体密度与物种多样性之间存在正线性相关，可用y = 506. 99x + 554.56描述。植物个体平均高度与植物物种多样性之间呈负相关，方程y = -0. 3862x + 11.406能很好地描述这种关系。树冠密度和胸高断面积随植物物种多样性呈对数增加，方程y = 21.756 1n x + 11.607和y = 7.4028 ln x + 9.6198能描述其关系。地上生物量和植物个体密度随植物物种多样性的变化未观察到规律模式。植物物种与植物个体数量的关系也可用负幂函数描述。植物竞争随植物物种多样性加剧，每种植物物种可能采取策略维持其最大种群数量，避免减少到低于其临界种群数量，这导致个体密度较高，并可能改变群落的结构特征。
