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Changes in carbon storages of fagus forest ecosystems along an elevational gradient on Mt. Fanjingshan in Southwest China

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Journal of Plant Ecology 2020年第2期13卷 139-149页

作者： Qiong Cai Chengjun Ji Xuli Zhou Helge Bruelheide Wenjing Fang Tianli Zheng Jiangling Zhu Lei Shi Haibo Li Jianxiao Zhu Jingyun Fang Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University100871 BeijingChina Institute of Biology/Geobotany and Botanical Garden Martin Luther University Halle-WittenbergAm Kirchtor 106108 HalleGermany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany Administration Bureau of Guizhou Fanjingshan National Nature Reserve 554400 JiangkouChina

Aims There are different components of carbon(C)pools in a natural forest ecosystem:biomass,soil,litter and woody *** asked how these pools changed with elevation in one of China’s ecologically important forest ecosystem,***(fagus L.,Fagaceae)forests,and what were the underlying driving factors of such *** The four C pools in nine beech forests were investigated along an elevational gradient(1095–1930 m)on *** in Guizhou Province,Southwest *** partitioning was used to explore the relative effects of stand age,climate and other factors on C *** addition,we compared the four C pools to other beech forests in Guizhou Province and *** Findings The total C pools of beech forest ecosystems ranged from 190.5 to 504.3 Mg C ha^(–1),mainly attributed to biomass C(accounting for 33.7–73.9%)and soil C(accounting for 23.9–65.5%).No more than 4%of ecosystem C pools were stored in woody debris(0.05–3.1%)and litter(0.2–0.7%).Ecosystem C storage increased significantly with elevation,where both the biomass and woody debris C pools increased with elevation,while those of litter and soil exhibited no such *** the Guizhou beech forests,climate and stand age were found to be key drivers of the elevational patterns of ecosystem and biomass C storage,while for beech forests globally,stand age was the most important *** to beech forests worldwide,beech forests in Guizhou Province displayed a relatively higher biomass C accumulation rate,which may be explained by a much higher precipitation in this *** present study provides basic data for understanding the C budgets of Chinese beech forests and their possible roles in regional C cycling and emphasizes the general importance of stand age and climate on C accumulation.

关键词： carbon components climate ecosystem carbon storage elevational gradient fagus forests stand age

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