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Species richness, forest types and regeneration of Schima in the subtropical forest ecosystem of Yunnan, southwestern China

引用

forest Ecosystems 2020年第3期7卷 443-461页

作者： Cindy QTang Peng-Bin Han Shuaifeng Li Li-Qin Shen Diao-Shun Huang Yun-Fang Li Ming-Chun Peng Chong-Yun Wang Xiao-Shuang Li Wei Li Wei Wang Zhi-Ying Zhang Institute of Ecology and Geobotany College of Ecology and Environmental ScienceYunnan UniversityKunming650504China Research Institute on Resource Insects Chinese Academy of ForestryKunming650224China caojian forest farm of yunlong forestry bureau Yunlong County672711YunnanChina Yunnan Academy of forestry Kunming650201China Tibet Agriculture and Animal Husbandry College Linzhi860000China

Background: Schima genus of Theaceae is confined to subtropics and tropics of South, East and Southeast *** species of Schima are distributed in subtropical China. Many of them appear as dominant canopy species in the subtropical forests. To date, Schima species richness distribution patterns of China have remained ***, there has been a longtime debate as to whether forests dominated by Schima species are early or late successional forests. We aim to clarify Schima species richness patterns and these species' roles in the forest succession and regeneration dynamics of the subtropical ecosystem in Yunnan Province, ***: We mapped Schima species richness distribution patterns in China. Based on 71 vegetation plots, we analyzed forest characteristics, population structure, and regeneration dynamics of Schima species in ***: Yunnan was found to harbor the greatest richness and the highest rarity-weighted richness of Schima species in the subtropical regions of China. We classified five primary and six secondary forest types containing Schima species as one of dominants. Yunnan had the high floristic diversity and varying stand structure of forests containing Schima species. The Schima species studied generally had a sporadic regeneration type and a long lifespan. Four species(Schima argentea, Schima villosa, Schima sinensis, Schima sericans) were shade-intolerant. But three species(Schima noronhae, Schima khasiana and Schima wallichii) were considered as bi-modal type species having shade-intolerant and shade-tolerant traits. Schima noronhae was seen to be a top dominant in late successional forests, while S. wallichii was found as a top-dominant in early or middle or late successional forests. ***, Schima villosa, Schima sinensis usually appeared as a top dominant in early or middle successional secondary forests, though they also presented as a second dominant in late-successional forests. Schima argentea and Schima se

关键词： forest structure Regeneration dynamics Schima Species richness forest succession Yunnan

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