云南哀牢山国家保护区几个过渡带树干附生苔藓的物种组成与多样性
Species composition and diversity of epiphytes of several ecotones in Ailao Mountain National Nature Reserve, Yunnan
查看参考文献48篇
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文摘
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对环境变化敏感的附生苔藓植物是亚热带潮湿生境山地森林生态系统的重要组分之一。为了解不同类型植物群落间过渡带附生苔藓植物多样性与分布特征,我们对哀牢山徐家坝地区中山湿性常绿阔叶林(也称为原生林)与3类不同类型森林(苔藓矮林、次生的栎类萌生林和滇山杨(Populus bonatii)林)之间的过渡带内树干附生植物的物种组成、多样性、生活型等进行了调查研究。结果表明:原生林与苔藓矮林过渡带的物种丰富度(68)和Shannon-Wiener多样性指数(3.46)低于其相邻的原生林(分别为85和3.69)和苔藓矮林(分别为92和3.98)。而在原生林与栎类萌生林、滇山杨林两类次生林的过渡带上,物种的丰富程度高于各自的次生森林但低于原生林。有些物种的分布仅限于过渡带,如亮叶光萼苔(Porella nitens)和细枝刺枝藓(Wijkia surcularis)的分布仅限于原生林–滇山杨林过渡带,狭叶厚角藓(Gammiella tonkinensis)仅出现于原生林–苔藓矮林过渡带,具有一定的保护价值。我们认为边缘效应产生高生物多样性这一特征对于过渡带树干附生苔藓植物群落而言并不符合。 |
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其他语种文摘
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Epiphytic bryophytes are sensitive to environmental factors and are important components of montane moist subtropical forests. The aim of this study was to investigate the biodiversity and distribution of bole epiphytic bryophytes in the ecotones among old growth forest (OGF) and three other forest types (i.e., old growth dwarf mossy forest (ODMF), 50-yr-secondary Lithocarpus forest (SLF), and secondary Populus bonatii forest (SPF) in the Xujiaba region of Ailao Mountains, Yunnan. We evaluated species composition, biodiversity, and life forms of epiphytic bryophytes on host trunks above the ground in these ecotones and adjacent communities. Species richness and Shannon-Wiener diversity were lower in the ecotone between OGF and ODMF (EOO) than the adjacent forest communities (i.e., OGF and ODMF), whereas these indices were higher in ecotones between OGF and SLF (EOSl) and between OGF and SPF (EOSp) than the adjacent secondary forests. The distribution of some species was restricted to specific ecotones. Porella nitens and Wijkia surcularis only appeared in EOSp, and Gammiella tonkinensis was restricted to EOO. Ecotones in montane moist evergreen broad-leaved forests in Ailao Mountains exhibit an important influence on the patterns of epiphyte species composition and diversity. |
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来源
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生物多样性
,2012,20(6):654-664 【核心库】
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DOI
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10.3724/sp.j.1003.2012.11073
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关键词
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生物多样性
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附生植物
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过渡带
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生活型
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地址
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1.
中国科学院西双版纳热带植物园, 中国科学院热带森林生态学重点实验室, 昆明, 650223
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中国科学院昆明植物研究所, 中国科学院生物多样性与生物地理学重点实验室, 昆明, 650223
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语种
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中文 |
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ISSN
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1005-0094 |
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学科
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植物学 |
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基金
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国家自然科学基金
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:4722403
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