机构地区: 华南农业大学林学院
出 处: 《中山大学学报(自然科学版)》 1999年第6期84-89,共6页
摘 要: 岭南地区稀有濒危植物135种,对其系统学、区系地理学特征进行全面分析,例证了8类可能的物种形成方式,包括地质的、气候的、特殊生境的、避难所性质的、自然杂交形成的、边缘效应形成的、土著区系分化产生的以及由于生境片断化造成的等,与稀有濒危植物形成的致濒机制密切相关.另对各类稀有濒危植物的特有现象分析还表明,它们存在3种基本的复合模式,即:“濒危+区域特有”、“濒危+狭域生境特有”、“濒危+广域星散分布”等. Floristic and systematic analysis of 135 rare and endangered plant species distributing in South China′s Lingnan region shows and exemplifies 8 types of formation and endangerment causes, i e , geologic, climatic, edaphic, of refuge, of natural breeding, of edge effect, developed out of indigenous flora and of habitat fragmentation Further analysis of their endemism makes 3 ecologic floristic patterns recognizable, which can be described as endangerment plus regional endemism, endangerment plus local endemism and endangerment plus wide but diffused dispersal
领 域: [生物学]