摘要
通过野外植被调查，结合文献资料，探讨了云南药山自然保护区种子植物区系的垂直分布格局。结果表明，温带区系成分所占比重，随着海拔的升高，总体上呈单调递增趋势，而热带区系成分所占比重呈单调递减格局；区系平衡点出现在海拔2000m左右。在平衡点之下，植物区系以热带、亚热带区系成分为主，而在此之上，则以温带区系成分为主。区系成分的聚类分析表明，研究区域内植被垂直带谱主要由1500m以下的干热河谷植被、1500-2000m左右的云南松林、2000-2600m的常绿阔叶林、2600-3100m的硬叶常绿阔叶林、3100-3600m的亚高山灌丛和3600m以上的高寒草甸构成，这与传统的植被类型划分方法的结果基本一致。
Based on field survey and documented data, altitudinal patterns of floristic composition in Mountain Yao Nature Reserve were examined. The results indicated that proportions of temperate elements showed a monotonously increasing trend, while that of tropical elements decreased against altitudinal gradients. The floristic equilibrium point was found at the elevation of 2000 m above sea level. Under the floristic equilibrium point, the majority was of tropical flora, and while above the point, temperate flora was dominant. The cluster analysis based on floristic elements showed that vertical vegetation band was consti-tuted by dry ＆ hot valley vegetation （below 1500 m）, Form. Pinus yunnanensis （1500 -2000 m）, ever-green-broad-leaved forest （2000 - 2600 m）, hard-evergreen broad-leaved forest （ 2600 - 3100 m）, subal- pine shrub （3100-3600 m） and alpine meadow（above 3600 m）.
出处
《武汉植物学研究》
CSCD
北大核心
2008年第3期271-275,共5页
Journal of Wuhan Botanical Research
基金
大理学院人才引进科研启动基金资助
国家自然科学基金面上项目(30760040)资助
关键词
药山自然保护区
种子植物
区系成分
垂直分布格局
Mountain Yao Nature Reserve
Seed plants
Floristic composition
Altitudinal patterns
