Elevational patterns of carbon,nitrogen and phosphorus in understory bryophytes on the eastern slope of Gongga Mountain,China  

作　　者：Zhe Wang Chunyan Pi Xiaoming Li Weikai Bao 

机构地区：[1]College of Life Sciences,Shanghai Normal University,Shanghai 200234,China [2]CAS 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

出　　处：《Journal of Plant Ecology》2019年第4期781-786,共6页植物生态学报（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China(no.31600316,31470023).

摘　　要：Aims The nutrient uptake,requirement and releasing rates of bryophytes are very different from those of tracheophytes.However,it is diffi-cult to make a quantitative evaluation of bryophytes’roles in nu-trient cycling and their specific eco-physiological adaptations due to lack of knowledge of their concentrations and stoichiometric ratios of carbon(C),nitrogen(N)and phosphorus(P).To fill this gap,the present study aims to investigate:(i)what are the elevational trends of C,N and P concentrations and stoichiometric ratios of bryophytes?(ii)whether C,N and P concentrations and stoichio-metric ratios of bryophytes differ between different bryophyte types(in terms of the growth form and living substrate)?and(iii)how do the exponent scalings of N and P of bryophytes change along the elevational gradient?Methods We measured and calculated the C,N,P concentrations and stoi-chiometric ratios of bryophytes from four elevations on the eastern slope of Gongga Mountain(22 species in total).Differences in these traits among elevations,and between different bryophyte types were compared.The log-log allometric regression parameters of N and P at each elevation were also determined and compared.Important Findings The C,N and P concentrations of bryophytes showed decreasing trends with increasing elevations.More specifically,erect bryo-phytes possessed higher C and N concentrations than those of pros-trate species,and terricolous species had higher P concentration than that of corticolous and saxicolous species.Bryophytes from different elevations had an invariant allometric regression slope for P versus N.Future research at a larger scale is in need for a more generalized law of bryophytes.

关 键 词：allometric scaling growth form living substrate stoichiometric ratio SUBALPINE 

分 类 号：S71[农业科学—林学]