草地学报2026，Vol.34Issue(7)：2603-2614,12.DOI:10.11733/j.issn.1007-0435.2026.07.023
兰州市永登县不同草地类型植物多样性特征及其影响因子分析
Analysis of Plant Diversity Characteristics and Influencing Factors in Different Grassland Types of Yongdeng County,Lanzhou City
摘要
Abstract
Elucidating the distribution patterns and driving mechanisms of herbaceous plant diversity provides a criti-cal scientific basis for developing ecological protection strategies.This study conducted a systematic survey of herba-ceous plant communities in Yongdeng County,Lanzhou City,using a grid sampling method.We investigated four distinct habitat types-temperate steppe,temperate desert steppe,alpine meadow,and cultivated grassland-to explore the effects of topographic and soil factors on species diversity.The results indicated that:(1)A total of 356 wild herbaceous species belonging to 197 genera and 53 families were recorded.Poaceae,Asteraceae,and Fabaceae were the 3 dominant families,accounting for 38%of the total species richness.(2)The effects of topographic fac-tors on diversity were habitat-specific.The trends of alpha-diversity indices along the elevational gradient differed significantly among grassland types,with the temperate steppe showing the most sensitive response.Species rich-ness exhibited a significant unimodal non-linear response to slope gradient and aspect;notably,species richness peaked on shady slopes and gentle slopes due to favorable hydrothermal conditions.(3)Soil nutrients were identi-fied as key drivers of diversity variation.Species richness was positively correlated with soil total carbon,but it showed significant negative correlations with soil total nitrogen and total phosphorus(P<0.05).(4)Multivariate analysis further revealed that species richness was primarily driven by soil carbon content(P<0.01).The Simpson index was significantly correlated with soil phosphorus content(P<0.01),while the Shannon-Wiener index showed a significant co-variation with the evenness index(P<0.05).关键词
草本植物多样性/草地类型/环境驱动因素/地形/土壤养分/永登县Key words
Herbaceous plant diversity/Grassland types/Environmental drivers/Topography/Soil nutrients/Yongdeng County分类
农业科技引用本文复制引用
郭万里,刘爽达,吴凡,王兰兰,刘旻霞,张吉宇..兰州市永登县不同草地类型植物多样性特征及其影响因子分析[J].草地学报,2026,34(7):2603-2614,12.基金项目
甘肃省科技重大专项计划(23ZDNA009) （23ZDNA009）
兰州市野生草本植物资源调查(GSCLZBDL2022-004,GSCLZBDL2023-004)资助 （GSCLZBDL2022-004,GSCLZBDL2023-004）
