极小种群植物四药门花在中山五桂山的种群分布

Distribution of Loropetalum subcordatum in Zhongshan Wuguishan,a Plant Species with Extremely Small Populations

[目的]对极小种群植物四药门花野生种群在中山五桂山的分布现状与生境进行调查。[方法]运用实地调查法,对广东中山五桂山四药门花的种群分布进行了调查。[结果]中山五桂山的四药门花在水平方向的分布是不连续、不均匀的,分布范围狭窄;林下缺乏四药门花的幼苗,自然更新困难,种群呈衰退型;部分大树为砍伐后萌生的植株,原生境人为干扰严重,濒临灭绝。[结论]人为干扰以及四药门花自身的生物学和生态学特性是使其种群衰退的原因。为了更好地保护和利用四药门花资源,建议加强对四药门花的就地保护、迁地保护、宣传教育,并完善相关法律法规。

[Objective] The aim was to study the habitat and wild population distribution of Loropetalum subcordatum species with extremely small populations on the mountain of Wuguishan in Zhongshan City.[Method] Though field investigation, the distribution of Loropetalum sub-cordatum species on the mountain of Wuguishan in Zhongshan City, Guangdong Province was investigated.[Result] In the horizontal direc-tion, the distribution of Loropetalum subcordatum in Wuguishan was discontinuous, uneven and narrow; There were no seedlings underforest-erea, and the natural regeneration of Loropetalum subcordatum was difficult, indicating that it was a declining population;Part of big trees were growing from the plants which were felling before, the habitat was disturbed seriously by human and the population has been becoming more and more extinction.[ Conclusion] The causes of population decline due to human disturbance as well as the biological and ecological charac-teristics of Loropetalum subcordatum which is urgently required for the conservation and utilization by strengthening in situ conservation , off site conservation, propaganda and education work as well as perfecting of laws and regulations.