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vegetation classification at the association level under the china vegetation classification system: an example of six Stipa steppe formations in china

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Journal of Plant Ecology 2019年第6期12卷 1009-1024页

作者： Changcheng Liu Thomas RWentworth Xianguo Qiao Ke Guo Dongjie Hou State Key Laboratory of vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Department of Plant and Microbial Biology North Carolina State UniversityBox 7612RaleighNC 27695-7612USA University of Chinese Academy of Sciences Beijing 100049China

Aims The latest china vegetation classification system(china-VCS)for natural/semi-natural vegetation has eight hierarchical levels:Associationvegetation-subtyp... 详细信息

Aims The latest china vegetation classification system(china-VCS)for natural/semi-natural vegetation has eight hierarchical levels:Associationvegetation-subtypevegetation-typeclassification is based on dominant species and their growth forms and has been completed at the formation *** principal challenge today in Chinese vegetation classification is to develop the china-VCS at levels below the formation in a way that is consistent with current international *** explored the following question:how can existing vegetation plot data help develop the china-VCS and improve its compatibility with other international classification systems?Methods We compiled 401 plots having plant cover and/or aboveground biomass measurements collected in six Stipa steppe formations and divided them into those with cover data(299 plots)and/or biomass data(283 plots).We applied a combination of hierarchical clustering and ordination to partition the cover and biomass data sets into formations and constituent *** then used supervised noise clustering to improve the classification and to identify the core plots representing each *** species were also identified at both association and formation ***,we compared the classification results based on cover and biomass data sets and combined these results into a comprehensive classification framework for the six *** Findings Our results using cover data were comparable with those using biomass data at both formation and association *** Stipa formations were classified into associations based on cover data,two based on biomass data and one based on both biomass and cover ***-seven associations were defined and proposed within the six formations,using cover or biomass data as consistent classification sections(CCSs).Both dominant species in the dominant stratum and diagnostic

关键词： association china vegetation classification system consistent classification section cluster analysis ordination Stipa steppe

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