Impact of grazing on germination trait selection in an alpine grassland on the Tibet Plateau

作     者：Yang Liu Kun Liu Zhilong Zhang Shiting Zhang Carol C.Baskin Jerry M.Baskin Ting Liang Haiyan Bu Shuxia Li Tingting Zhang Xianliang Cui Sa Xiao 

作者机构：State Key Laboratory of Grassland and Agro-ecosystemsSchool of Life SciencesLanzhou UniversityLanzhou 730020China Department of Chemistry and Life ScienceGansu Normal College for NationalitiesHezuo 74700China Department of BiologyUniversity of KentuckyLexingtonKY 40506USA Department of Plant and Soil SciencesUniversity of KentuckyLexingtonKY 40506USA 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2022年第15卷第4期

页      面：818-828页

核心收录：

学科分类：090503[农学-草业科学] 0909[农学-草学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Natural Science Foundation of China(31760132,31670437,32171518,31870412,41830321) the National Key R§D Program of China(2018YFD0502401,2017YFC0504801) the Research Fund for Science-Technology Foundation for Young Scientist of Gansu Province,China(18JR3RP248) 

主　　题：alpine grassland biodiversity germination trait selection grazing Tibet Plateau 

摘      要：Previous studies indicated that grazing can cause significant changes in abiotic and biotic environment in ***,how these changes impact germination trait selection in grassland has not been well ***,we aimed to explore whether grazing can significantly change germination trait diversity and composition of grasslands *** measured the germination traits of species in the laboratory,and compared their performance in grazed and nongrazed ***,we compared the community-weighted means of germination traits and functional diversity of grazed and nongrazed grasslands based on these germination traits to know whether grazed and nongrazed grasslands differed in their germination trait *** the species level,we found that the changes of abundance in grazed and nongrazed grasslands were not related to species’germination ***,at the community level,compared with nongrazed grasslands,species in the grazed grasslands generally exhibited a higher seed germination ***,seed germination response in grazed grasslands was more positively related to alternating temperature than in nongrazed grasslands,and breadth of the germination temperature niche was narrower in grazed than in nongrazed *** with nongrazed grasslands,seed germination trait diversity was increased and germination trait evenness decreased in grazed *** can change microhabitat conditions,thereby changing germination trait selection by environmental filtering,resulting in a significant difference in germinate trait composition at the community level.