我国特有植物缙云卫矛濒危机理分析

On endangered mechanism of Euonymus chloranthoides,an endemic to China

缙云卫矛为我国二级保护植物,仅分布于重庆北碚缙云山和统景镇东温泉公园,皆为旅游胜地.缙云卫矛常以伴生种存在于慈竹林.伴随着旅游业的发展,适宜于缙云卫矛生存的空间环境越来越小,致使该物种处于濒危状态.导致缙云卫矛濒危的原因主要有: 1 物种的生态幅较小,适宜生长在水热条件良好的环境中; 2 形态可塑性较差,对生境的适应能力差; 3 生长发育缓慢,竞争能力较弱; 4 种子萌发率低; 5 人为干扰严重.此外,还讨论了缙云卫矛保护对策.

Euonymus chloranthoides Yang is one of the state second class protected species and endemic to China.It distributes in Jinyun Mountain,Beibei and in East Hot Spring Park,Tongjing,Chongqing,China.E.chloranthoides is as a companion species under arborous layer,even in bamboo forest.With the development of the tourism,the species has been threatened because of the inadequate environment to the species.The endangered reasons for the species are as follows:(1) E.chloranthoides is a stenotopic species and only exists in some regions with a relatively adequate humidity and temperature.(2) The species has relatively weak morphological plasticity and weak eco-adaptive capacity.(3) Its germination ratio of seed is so lower.(4) It has lower growth and development rate and lower competition ability with the other species.(5) There are more and more human activity intervention.Moreover,the strategy for conservation of this species was discussed.