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C:N:P stoichiometry of Ericaceae species in shrubland biomes across Southern China:influences of climate,soil and species identity

查看全文 作　　者：Qiang [1,2]Zhang;Qing [3]Liu;Huajun [3]Yin;Chunzhang [3]Zhao;Lin [4]Zhang;Guoying [5]Zhou;Chunying [3]Yin;Zhijun [6]Lu;Gaoming [1]Xiong;Yuelin [7]Li;Jiaxiang [8]Li;Wenting [1]Xu;Zhiyao [9]Tang;Zongqiang [1,2]Xie 高影响力作者 机构地区：[1]State Key Laboratory of Vegetation and Environment Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;[2]University of Chinese Academy of Sciences,Beijing 100049,China;[3]Key laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;[4]Key Laboratory of Alpine Ecology and Biodiversity of Chinese Academy of Sciences,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;[5]Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008;[6]Key Laboratory of Aquatic Botany and Watershed Ecology,Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China;[7]South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;[8]College of Forest,Central South University of Forestry&Technology,Changsha 410004,China;[9]Department of Ecology,College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes,Peking University,Beijing 100871,China高影响力机构 出　　处：《Journal of Plant Ecology》索引2019年第12卷第2期,共12页高影响力期刊 基　　金：This work was supported by the‘Strategic Priority Research Program-Climate Change:Carbon Budget and Related Issues’of the Chinese Academy of Sciences(#XDA05050300). 摘　　要：Aims Carbon(C),nitrogen(N)and phosphorus(P)stoichiometry strongly affect functions and nutrient cycling within ecosystems.However,the related researches in shrubs were very limited.In this study,we aimed to inves-tigate leaf stoichiometry and its driving factors in shrubs,and whether stoichiometry significantly differs among closely related species.Methods We analyzed leaf C,N and P concentrations and their ratios in 32 species of Ericaceae from 161 sites across southern China.We examined the relationships of leaf stoichiometry with environmen-tal variables using linear regressions,and quantified the interactive and independent effects of climate,soil and species on foliar stoi-chiometry using general linear models(GLM).Important Findings The foliar C,N and P contents of Ericaceae were 484.66,14.44 and 1.06 mg g−1,respectively.Leaf C,N and P concentrations and their ratios in Ericaceae were significantly related with latitude and altitude,except the N:P insignificantly correlated with latitude.Climate(mean annual temperature and precipitation)and soil properties(soil C,N and P and bulk density)were significantly influenced element stoichiom-etry.The GLM analysis showed that soil exerted a greater direct effect on leaf stoichiometry than climate did,and climate affected leaf traits mainly via indirect ways.Further,soil properties had stronger influ-ences on leaf P than on leaf C and N.Among all independent factors examined,we found species accounted for the largest proportion of the variation in foliar stoichiometry.These results suggest that species can largely influence foliar stoichiometry,even at a lower taxonomic level. 关 键 词：biogeographic pattern phylogenetic effect closely related species,Ericoid Mycorrhiza SHRUB
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