高原鼠兔对高寒草甸植物物种多样性和功能多样性关系的影响  

Effects of plateau pika on the relationship between plant species diversity and functional diversity in alpine meadow

作　　者：段媛媛 张静[1] 王玲玲 刘彩凤 王乙茉 周俗[2] 郭正刚[1] DUAN Yuan-yuan;ZHANG Jing;WANG Ling-ling;LIU Cai-feng;WANG Yi-mo;ZHOU Su;GUO Zheng-gang(State Key Laboratory of Grassland Agro-ecosystems,Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affairs,Engineering Research Center of Grassland Industry,Ministry of Education,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China;Sichuan Academy of Grassland Sciences,Chengdu 611731,China)

机构地区：[1]兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业教育部工程研究中心,兰州大学草地农业科技学院,甘肃兰州730020 [2]四川省草原科学研究院,四川成都611731

出　　处：《草业学报》2022年第11期25-35,共11页Acta Prataculturae Sinica

基　　金：国家自然科学基金(32171675);西藏草业时空拓展技术模式创新与示范(XZ202101ZD003N);中央高校基本科研业务费专项资金(lzujbky-2020-it12)资助。

摘　　要：草地植物物种多样性和功能多样性的关系会因环境改变而变化。高原鼠兔干扰往往会改变其巢域范围内高寒草甸的水热过程,但尚不清楚其是否影响高寒草甸植物物种多样性和功能多样性的关系。本研究在甘肃碌曲、青海祁连和共和县同步选择调查区,每个调查区采用配对设置样地的方法,分析了高原鼠兔干扰对高寒草甸植物物种多样性和功能多样性关系的影响。结果表明:高原鼠兔干扰显著增加了物种丰富度指数和物种多样性指数,而没有明显影响物种均匀度指数。高原鼠兔干扰显著增加了功能丰富度指数(P<0.05),但没有显著影响功能均匀度指数和功能离散度指数。高原鼠兔干扰促进植物功能丰富度指数与物种丰富度指数的关系从对数函数关系转变为二次函数关系,植物功能均匀度指数与物种均匀度指数的关系从不显著相关变为显著正相关;高原鼠兔干扰显著减弱了植物功能丰富度指数与物种丰富度指数、植物功能丰富度指数和物种多样性指数间的正相关性、植物功能离散度指数与物种丰富度指数的负相关性,增加了植物功能离散度指数和植物物种多样性指数间的负相关性。这为解读高原鼠兔干扰下植物群落物种共存机制提供了基础信息,有助于了解高原鼠兔干扰下植物多样性影响高寒草甸生态系统功能的途径。The relationship between plant species diversity and functional diversity in grassland will change with environmental changes.The plateau pika(Ochotona curzoniae)has an effect on the hydrothermal process of alpine meadow in its nesting area.However,it is not clear whether the disturbance of plateau pika effects the relationship between plant species diversity and functional diversity in alpine meadow.A random stratified and paired design was used to select plots in Luqu county in Gansu Province,and Qilian and Gonghe Counties in Qinghai Province and a field survey was conducted to investigate the effects of plateau pika disturbance on the relationship between plant species diversity and functional diversity of the alpine meadow.It was found that plateau pika disturbance significantly increased the plant species richness index and the species diversity index but did not significantly affect the species evenness index.Plateau pika disturbance significantly increased plant functional richness index(P<0.05)but had no significant effect on the plant functional evenness index or the functional divergence index.With plateau pika disturbance effects,the relationship between plant functional richness index and species richness index changed from a logarithmic function to a quadratic function,and the relationship between plant functional evenness index and species evenness index changed from non-significant to significantly positive.In addition,positive correlations between functional richness index and species richness index,and functional richness index and species diversity index were significantly decreased,as were negative correlations between functional divergence index and species richness index,and functional divergence index and species diversity index were significantly decreased.The findings of this study provide basic information for understanding the mechanism of species coexistence of plant communities under plateau pika disturbance and help understanding of how plant diversity effects in an alpine meadow ecos

关 键 词：高原鼠兔干扰 高寒草甸 植物物种多样性 植物功能多样性 

分 类 号：S812.6[农业科学—草业科学]