生态科学2025，Vol.44Issue(2)：77-85,9.DOI:10.14108/j.cnki.1008-8873.2025.02.008
藏东南山地不同生活型植物群落β多样性及群落构建机制
The β-diversity and community assembly mechanism of different plant life forms in the mountains of southeastern Xizang
摘要
Abstract
Plant life forms,as a combination of plant functional traits,reflect the differences in plant ecological niches and life history strategies.Therefore,the response of different life forms to the environment and their community assembly mechanisms may vary.Disentangling the relative importance of deterministic and stochastic processes along an elevational gradient and understanding their environmental influences are important for advancing our knowledge of plant community formation and succession.For this study,woody and herbaceous communities in the mountains of southeastern Xizang were selected.Variations in community species composition,changes in the deterministic processes of community assembly along the elevation gradient,and the dominant environmental factors influencing these processes were analyzed using β-diversity and null models.The results demonstrated that the variation in species composition for both types of plant communities exhibited a significant decreasing trend with increasing elevation.The β-diversity of woody plant communities ranged from 0.74 to 0.36,while that of herbaceous plant communities ranged from 0.84 to 0.40.For woody plant communities,the relative contribution of deterministic processes increased with elevation and was mainly influenced by precipitation.The relative contribution of deterministic processes to herbaceous plant communities decreased with increasing elevation and was mainly influenced by temperature.These findings reveal differences in the driving factors of community assembly between woody and herbaceous plants in the southeastern Tibetan alpine environment,attributable to their differing life history strategies.This research enhances understanding of species distribution patterns and the mechanisms that maintain community diversity.关键词
β多样性/群落构建机制/生态位理论/中性理论/生活型/海拔Key words
β-diversity/community assembly mechanisms/niche theory/neutral theory/life form/elevation分类
生物科学引用本文复制引用
陈卓,印大秋,李进,王世军,黄汐月,张鸿南,王国严,罗建,石松林,张晓超,唐晓鹿,裴向军..藏东南山地不同生活型植物群落β多样性及群落构建机制[J].生态科学,2025,44(2):77-85,9.基金项目
国家重大工程建设技术服务项目(JC2020/D02) （JC2020/D02）
科技部第二次青藏高原综合科学考察研究(2019QZKK0301) （2019QZKK0301）
国家自然科学基金(31860123,31560153) （31860123,31560153）
华能西藏雅鲁藏布江水电开发投资有限公司生态检测项目(JC2022/D01) （JC2022/D01）
