2026年4月12日 星期日
云南省苦苣苔科野生植物的物种多样性与地理分布格局
Species diversity and geographic distribution pattern of wild species of Gesneriaceae in Yunnan Province, China
2026年 第35卷 第2期 页码[32-42]    下载全文[1.1MB]  
摘要

在系统整理云南省苦苣苔科(Gesneriaceae)野生植物物种名录与地理分布数据的基础上,利用县级尺度的物种分布数据,从属种组成、区系分化率、特有率、水平分布格局、垂直分布格局等方面分析云南省苦苣苔科野生植物的物种多样性特征及地理分布格局,并采用筛除算法筛选热点地区。结果显示:云南省苦苣苔科野生植物共计32属336种(含种下等级,下同),其中,中国特有种有250种,云南特有种有142种,特有率分别为74.4%和42.3%。122个县级行政区分布有苦苣苔科植物,其中,麻栗坡县分布的种数(90)最多,金平苗族瑶族傣族自治县分布的种数(83)次之。总体来看,云南省苦苣苔科野生植物及其区系分化率高值区域主要集中在东南部和西北部,云南特有率的高值区域呈离散型分布。海拔>1 000~1 500 m区域分布的属数和种数最多,共计29属167种。不同属之间分布区域的海拔差异较大,报春苣苔属(Primulina Hance)、蛛毛苣苔属〔Paraboea (Clarke) Ridley〕、芒毛苣苔属(Aeschynanthus Jack)等12个属的物种主要分布在海拔500 m及以下区域;马铃苣苔属(Oreocharis Benth.)、斜柱苣苔属(Loxostigma C. B. Clarke)、汉克苣苔属(Hencklia Spreng.)物种主要分布在3 000 m以上区域。优势属物种主要集中在海拔>1 000~2 000 m区域。在种数达到80%时,共筛选到麻栗坡县、金平苗族瑶族傣族自治县等16个热点地区,这些地区主要集中在东南部,个别零散分布在中部和西北部,占云南省总面积的14.68%。综上,云南省苦苣苔科野生植物物种丰富,特有性明显,主要分布在云南省的东南部和西北部地区;优势属的垂直分布跨度较大,具有横断山区系与云贵高原区系复合性特征。此外,建议加强对热点地区的生境保护。

Abstract

Based on a systematic compilation of the species list and geographical distribution data of wild species of Gesneriaceae in Yunnan Province, China, the species diversity characteristics and geographic distribution patterns of wild species of Gesneriaceae in Yunnan Province from the genus and species composition, floristic differentiation rate, endemism rate, horizontal distribution pattern, and vertical distribution pattern, etc. were analyzed by using county-level species distribution data, and the hotspot regions were screened by a screening algorithm method. The results show that there are a total of 336 species (including infraspecies, the same below) belonging to 32 genera of wild species of Gesneriaceae in Yunnan Province. Among these, there are 250 endemic species of China and 142 endemic species of Yunnan, with endemism rates of 74.4% and 42.3%, respectively. The Gesneriaceae species distribute in 122 county-level administrative regions. Among them, Malipo County has the highest number of species (90), followed by Jinping Miao, Yao and Dai Autonomous County (83). Overall, the wild species of Gesneriaceae in Yunnan Province and their high numerical regions of floristic differentiation rates are mainly concentrated in the southeast and northwest, while the high numerical regions for the endemism rate in Yunnan exhibit a dispersed distribution. The numbers of genera and species distributed in elevation range of >1 000-1 500 m are the highest, with a total number of 29 genera and 167 species. There are great differences in elevation among the distribution regions of different genera. Species from 12 genera, such as Primulina Hance, Paraboea (Clarke) Ridley, and Aeschynanthus Jack, are primarily distributed at elevation of 500 m and below, while species from  Oreocharis Benth., Loxostigma C. B. Clarke, Hencklia Spreng. are primarily distributed at elevation above 3,000 m. The species of dominant genera are mainly concentrated in elevation range of >1 000-2 000 m. When the number of species reached 80%, a total of 16 hotspot regions are identified, including Malipo County, Jinping Miao, Yao and Dai Autonomous County, etc. These regions are primarily concentrated in the southeast, and a few regions are scattered in the central and northwest, accounting for 14.68% of the total area of Yunnan Province. In summary, the wild species of Gesneriaceae in Yunnan Province are rich and exhibit pronounced endemism, primarily distribute in the southeastern and northwestern regions of Yunnan Province. The dominant genera show a significant vertical distribution range, and exhibit composite characteristics of the Hengduan Mountain floristic region and the Yungui Plateau floristic region. In addition, it is recommended to strengthen the habitat protection in these hotspot regions.

 

关键词苦苣苔科; 物种多样性; 水平分布; 垂直分布; 热点地区
Key wordsGesneriaceae; species diversity; horizontal distribution; vertical distribution; hotspot region
作者田茜, 白新祥
所在单位贵州大学林学院, 贵州 贵阳 550025
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下载次数198
基金项目国家自然科学基金项目(32260782); 贵州省科研机构创新能力建设专项(黔科合服企[2024]013)