铜壁关自然保护区珍稀濒危植物海拔梯度分布格局

铜壁关自然保护区有各类珍稀濒危植物387种。其中国家重点保护野生植物30种,中国珍稀濒危植物44种,云南省级保护植物53种,CITES公约保护植物269种。在保护区整个海拔梯度上均有珍稀植物分布,但很不均匀。海拔210～3 400 m,珍稀保护植物丰富度随海拔梯度的变化呈典型的单峰曲线,国家级和省级保护植物在800～1 100 m达到峰值,分别为18种和37种,各占30种的60.0%和53种的69.8%;而CITES物种在1 200～1 900 m达到峰值,占269种的49.4%。

Study on Distribution Pattern of the Rare and Endangered Plant Species in Tongbiguan Nature Reserve

There were 387 rare and endangered plant species in Tongbiguan Natural Reserve.Among which 30 species belonged to National Key Wild Plant Species Emphatically Protected in China;44 were listed as Rare and Endangered Plant Species in China;53 were the protected plant species in Yunnan Province;269 were protected species listed in CITES convention appendix III and II according to the survey.It was showed that the rare and endangered plant species were unevenly distributed between 210-3 400 m in different elevation gradients inside the nature reserve.The richness of the rare,endangered and protected plant species reflected the typical characteristics of the single peak curve along the altitudinal gradient variation.The distribution of the nationally and provincially protected plant species reached their peaks between the altitudes from 800 m to 1 100 m.There were 18 nationally protected species at this elevation range,accounting for 60.0% of the total 30 species;and there were 37 provincially protected species distributed between 800-1 100 m elevation range,accounting for 69.8% of the total 53 species respectively.However,49.4% of the 269 CITES listed plant species were distributed between 1 200-1 900 m elevation range.