| 摘要: |
| 生态群落交错区通常物种丰富，区系成分复杂而被视为关键带。藏南布丹拉山处在半湿润向半干旱的生态环境过渡带上，因其特殊的自然地理环境有着丰富的山地植物多样性，但目前这一重要生态过渡区的种子植物组成和区系成分海拔分布格局还缺乏了解。为了理清布丹拉山南坡种子植物区系成分及其垂直分布变化格局，该文通过野外植物群落的样方调查、实验室标本鉴定与相关文献资料的查阅，系统研究了布丹拉山南坡种子植物属种区系地理成分性质，探讨了优势属丰富度和属区系地理成分沿海拔梯度的变化趋势。结果显示，该区种子植物约有45科156属316种，其中单种属和小属最丰富。区系地理成分在属种水平上温带分布型占主导地位。在地理成分垂直分布梯度上，温带分布型属在海拔4000 m时出现峰值，含53属，呈现随海拔的升高呈现下降的趋势。该区植物区系地理成分的性质和物种丰富度的垂直分布变化格局受当地半湿润的气候条件与局域环境因子和地形因子综合作用的影响。该研究结果对该区域的植物多样性保护与生态屏障的建设有重要的科学意义。 |
| 关键词: 植物区系，海拔梯度，植物多样性，植物地理，布丹拉山 |
| DOI： |
| 分类号: |
| Fund project:国家自然科学(31760127) |
|
| Analysis of elevation pattern of seed flora on the south slope of Budanla mountain in southern Tibet, China |
|
WANG Junwei1, MING Shengping2, YANG Kun1, HE Min1, LA Qiong1
|
|
1.College of Sciences,Tibet University;2.Yunnan Lijiang Forest Ecosystem National Observation and Research Station,Kunming#$NBSInstitute#$NBSof#$NBSBotany,#$NBSChinese#$NBSAcademy#$NBSof#$NBSSciences,Yunnan Lijiang
|
| Abstract: |
| The ecotone of ecological communities is usually rich in species and complex in floristic components, which is regarded as a key zone. Budanla Mountains is located in the transition zone of semi-humid to semi-arid ecological environment in Tibet. Because of its special natural geographical environment, it has rich mountain plant diversity. However, the composition and floristic characteristics of seed plants in this important ecological transition area are still not well understood. In order to clarify the floristic composition and vertical distribution pattern of seed plants on the south slope of Budanla Mountains, the floristic characteristics of seed plants on the south slope of this mountain were systematically studied through field plant community quadrat investigation, laboratory specimen identification and related literature review in this paper, the richness pattern of advantage genera and geographical composition along the altitude gradient was also explored. The results showed that there were approximately 316 species of seed plants belonging to 45 families and 156 genera in the south slope of Budanla Mountains, in which there were the most abundant single species and small genera of seed plants. The temperate distribution type is dominant at the genus and species level. In the vertical distribution gradient of geographical elements, the temperate distribution type has a peak value at 4000 m, including 53 genera, and shows a downward trend with the increase of altitude. The nature of floristic geographical elements and the vertical distribution of species richness in this area are affected by the local semi humid climate, local environmental factors and topography. The results of this study have important scientific significance for the protection of plant diversity and the construction of ecological barriers in the region. |
| Key words: Flora, Elevation gradient, Plant diversity, Phytogeography, Budanla Mountain |
