Diversity Pattern and Phylogenetic Structure of Plant Communities in Alpine Ecological Key Zone

doi:10.11733/j.issn.1007-0435.2023.09.022

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (9): 2777-2786.DOI: 10.11733/j.issn.1007-0435.2023.09.022

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Diversity Pattern and Phylogenetic Structure of Plant Communities in Alpine Ecological Key Zone

WANG Jun-wei^1,2,3, MING Sheng-ping⁴, XU Min⁵, LA Qiong^1,2,3

1. School of Ecology and Environment, Tibet University, Lhasa, Tibet 850000, China;
2. Key Laboratory of Biodiversity and Eco-environmental Protection of the Qinghai-Tibetan Plateau(Ministry of Education), Lhasa, Tibet 850000, China;
3. Tibet Yani Wetland Ecosystem Positioning Observation Research Station, Nyingchi, Tibet 860000, China;
4. Yunnan Lijiang Forest Ecosystem National Observation and Research Station, Kunming Institute of Botany, Chinese Academy of Sciences, Lijiang, Yunnan Province 674100, China;
5. Forestry Survey and Planning Research Institute of Tibet Autonomous Region, Lhasa, Tibet 850000, China

Received:2023-03-06 Revised:2023-04-16 Online:2023-09-15 Published:2023-10-07

高山生态关键带植物群落多样性格局与系统发育结构

王俊伟^1,2,3, 明升平⁴, 许敏⁵, 拉琼^1,2,3

1. 西藏大学生态环境学院, 西藏拉萨 850000;
2. 青藏高原生物多样性与生态环境保护教育部重点实验室, 西藏拉萨 850000;
3. 西藏雅尼湿地生态系统定位观测研究站, 西藏林芝 860000;
4. 中国科学院昆明植物研究所云南丽江森林生态系统野外科学观测研究站, 云南丽江 674100;
5. 西藏自治区林业调查规划研究院, 西藏拉萨 850000

通讯作者: 拉琼,E-mail:lhagchong@163.com
作者简介:王俊伟(1994-),男,彝族,云南开远人,硕士,助教,主要从事高山植物群落生态学研究,E-mail:jwyx12240315@126.com
基金资助:
国家自然科学基金项目(31760127)；2019年中央财政支持地方高校改革发展专项资金“生态学一流学科建设项目”(藏财科教指[2019]01号)资助

Abstract

Abstract: To explore the altitudinal patterns of high-altitude plant community diversity and their community-building mechanisms,this study selected vegetation communities on the southern slopes of the Budanla Mountain in the ecological transition zone. The responses of species richness,phylogenetic diversity,and phylogenetic structure to changes in elevation gradient were comprehensively analyzed. The results:A total of 298 seed plants were recorded in the quadrat survey,belonging to 45 families and 149 genera. The results of generalized linear regression analysis showed that there was no significant correlation between seed plant species richness and phylogenetic diversity and elevation on the southern slope of Budanla Mountain. However,the Shannon-Wiener index (H),Simpson dominance index (D) and Pielou evenness index (E) increased significantly with the increase of elevation. Shannon-Wiener index was significantly positively correlated with other species diversity indexes and phylogenetic diversity indexes. There were no significant correlation between phylogenetic structure index and other diversity indexes. In terms of phylogenetic structure,the phylogenetic structure of plant communities on the southern slope of Budanla Mountain had no obvious trend with the increase of elevation gradient,and the phylogenetic structure was mainly clustered. These findings suggest that both species diversity and phylogenetic diversity in alpine ecotransition zones are not significantly related to elevation,and that the ecological role of habitat filtering plays a major role in plant community construction.

Key words: Ecotone, Species diversity, Community phylogenetics, Phylogenetic diversity, Phylogenetic structure, Elevation pattern

摘要： 为探讨高海拔植物群落多样性海拔格局及其群落构建机制,本研究以生态过渡带布丹拉山南坡植被群落为研究对象。综合分析了物种丰富度、系统发育多样性、系统发育结构对海拔梯度变化的响应。研究结果:样方调查共记录了298种种子植物,隶属于45科149属。布丹拉山南坡种子植物物种丰富度与系统发育多样性和海拔相关性均不明显,但沿海拔梯度升高,Shannon-Wiener指数(H)、Simpson优势度指数(D)和Pielou均匀度指数(E)显著增大。Shannon-Wiener指数与其他物种多样性指数、系统发育多样性指数之间都显著正相关,系统发育结构指数与其他多样性指数无显著相关。布丹拉山南坡植物群落系统发育结构主体上表现为聚集,沿海拔梯度并无明显变化趋势。表明高山生态过渡带物种多样性和系统发育多样性与海拔关系都不显著,生境过滤的生态作用对植物群落构建起主要作用。

关键词: 生态过渡带, 物种多样性, 群落系统发育, 系统发育多样性, 系统发育结构, 海拔格局

CLC Number:

Q178.1+4

WANG Jun-wei, MING Sheng-ping, XU Min, LA Qiong. Diversity Pattern and Phylogenetic Structure of Plant Communities in Alpine Ecological Key Zone[J]. Acta Agrestia Sinica, 2023, 31(9): 2777-2786.

王俊伟, 明升平, 许敏, 拉琼. 高山生态关键带植物群落多样性格局与系统发育结构[J]. 草地学报, 2023, 31(9): 2777-2786.

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Diversity Pattern and Phylogenetic Structure of Plant Communities in Alpine Ecological Key Zone

高山生态关键带植物群落多样性格局与系统发育结构

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