草业科学2025，Vol.42Issue(5)：1152-1161,10.DOI:10.11829/j.issn.1001-0629.2023-0662
坡向对高寒草甸植被特征和群落构建的影响
Effects of slope aspect on vegetation characteristics and community assembly of alpine meadows
摘要
Abstract
The variation of the slope aspect can cause microenvironmental heterogeneity,affecting the assembly process of the plant community,plant community composition,and species diversity at the local scale.The vegetation characteristics of the shade and sunny aspects were studied in an alpine meadow on the eastern edge of the Qinghai-Tibet Plateau in China to investigate the influence of the slope aspect on vegetation characteristics(functional groups,species diversity,and community composition)and community assembly in the alpine meadow.The results indicated that the plant community in the area was predominantly composed of upright-growing forbs,and hemicryptophytes.The species ratio of forbs,rosette type,stoloniferous type,geocryptophytes,and annual/biennial plants was lower on shade aspect than on the sunny aspect(P＜0.05),while the species ratio of Compositae,erect type,cespitose type,hemicryptophyte,and geocryptophytes was higher on shade aspect than on sunny aspect(P＜0.05).The species diversity was higher on the shady aspect than on the sunny aspect(P＜0.01).The slope aspect significantly affected the plant community composition(P=0.001),and the similarity percentage(SIMPER)analysis demonstrated that the slope aspect explained more than 40％of the difference in plant community composition.The Raup-Crick dissimilarity metric demonstrated that the plant community assembly process on the shade aspect was primarily driven by stochastic processes,while deterministic processes mainly influenced the plant community assembly process on the sunny aspect.The results provide a theoretical foundation for the management and utilization of local alpine meadows.关键词
功能群/植物群落组成/物种多样性/生活型/生长型/随机过程/确定性过程Key words
functional groups/plant community composition/species diversity/life form/growth form/stochastic processes/deterministic processes引用本文复制引用
郭倩,王博,王平芳,樊勇明,卢培培,张魁,王喜龙..坡向对高寒草甸植被特征和群落构建的影响[J].草业科学,2025,42(5):1152-1161,10.基金项目
陇东学院博士基金项目(XYBYZK2217、XYBYZK2216、XYBYZK2215) （XYBYZK2217、XYBYZK2216、XYBYZK2215）
甘肃省自然科学基金项目(23JRRM742) （23JRRM742）
甘肃省教育厅高校教师创新基金项目(2023B-209) （2023B-209）
