摘要
为了解金佛山自然保护区兰科植物的区系特征,通过野外实地调查、标本采集与鉴定及室内分析,对金佛山自然保护区兰科植物的分布格局等进行了分析。结果表明金佛山兰科植物区系具有以下特征:1)种类丰富,区系成分复杂多样,调查表明金佛山共分布有各类兰科植物48属114种,按照吴钲镒先生对中国种子植物属的分布区类型划分原则,可以划分为8种分布区类型;2)特有现象明显,共分布有中国特有兰科植物47种,包括3个金佛山地方特有种;3)垂直分布格局明显,在海拔梯度上兰科植物的分布总体呈现出中间膨胀型的趋势;4)不同海拔段的兰科植物濒危程度存在较大差异,低海拔地区物种受威胁程度相对较低,资源保存状况更好,这种分布格局与其他地区有着显著的区别;5)区系的温带性质明显,同时具有一定的热带亲缘关系。研究表明金佛山兰科植物种类丰富,特有现象明显,其海拔梯度格局与其他地区有较为显著的区别,区系热带亲缘关系较为明显。
In order to study the flora character of the orchids fi＇om Jinfomount. Nature Reserve, this paper has analysised the distributed pattern of the orchids by field surveying, collection sample and data analysised. The flora characteristics of orchids from Jinfomount. Nature Reserve is as follows： 1 ） Rich in types and complex diverse in elements, and the result shows that there are 114 species belonging to 48 genera, and there are 8 areal-types of flora according to Wu＇s classification principles for the Chinese seed plants ; 2 ） Obvious in unique situation, and there are 47 species endemic to China and 3 species endemic to Jinfo mountain; 3） Clear in vertical distribution pattern, and the distribution at altitude grade take on the direction of expand in middle; 4） Greater differences to the level of threat at different altitudes. It is lower in the low-lying areas and the resources are saved better relatively. It is significant difference from the other regions at the distribution pattern; 5） Obvious temperate character of flora and it is tropical related. It shows that it is rich in types, obvious in unique situation ,and its distribution pattern is significant difference from the other regions and it is tropical related.
出处
《重庆师范大学学报（自然科学版）》
CAS
2010年第2期36-39,78,共5页
Journal of Chongqing Normal University:Natural Science
基金
科技部十一五支撑计划项目(No.2006BAC01A16)
关键词
兰科植物
物种多样性
海拔梯度
区系成分
濒危等级
species diversity
elevational gradient
floristic components
endangered categories
