Plant life form determines spatiotemporal variability and climate response of plant seed rain in subtropical forests

作     者：Yuyang Xie Zehao Shen Xuejing Wang Liu Yang Jie Zhang Yuyang Xie;Zehao Shen;Xuejing Wang;Liu Yang;Jie Zhang

作者机构：MOE Laboratory for Earth Surface ProcessesInstitute of EcologyCollege of Urban and Environmental SciencesPeking UniversityBeijing100871China 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2024年第11卷第2期

页      面：193-201页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：the Second Tibetan Plateau Scientific Expedition and Research Program (STEP)(No.2019QZKK0402) 

主　　题：Seed rain Seed output Seed mass Elevation Interannual variation Lifeform 

摘      要：Spatiotemporal variation of seed rain reflects the response of plants in terms of their reproductive strategy to environmental *** this study,we collected seeds from four sites in the Dalaoling Nature Reserve,Hubei Province,China,between 2011 and 2014,measured seed output and seed mass as seed rain traits,and compared their interannual and elevational ***,we ran phylogenetic generalized mixed linear models(PGLMMs) to explore the effects of temperature and precipitation as well as interspecific differences on seed rain,and fitted the best regression models for seed rain *** of canopy and understory *** results showed no correlation between values of seed output and seed ***,the variation of the two traits showed significantly positive *** output of canopy species generally decreased with increasing elevation,and showed significant interannual difference;however,seed output of understory species and seed mass for both canopy and understory species did not show consistency tends along elevational or in interannual *** output was significantly affected by temperature and precipitation,while seed mass mainly varied due to interspecific *** explained more the variation of the seed output of canopy species than that of understory species,with R^(2) values of 43.0%and 29.9%,*** results suggested that canopy plants contributed more to the reproductive dynamics of the whole communities,and the canopy s buffer effect on the underground weakened the response of understory plants to weather variation in terms of their reproductive strategy.