摘要
对分布于西藏朗县、米林县及波密县的柏木属植物群落植物区系进行研究,为柏木属植物群落长期稳定更新提供理论依据。(方法)设置典型样地对群落进行野外调查,应用双向指示种法(TWINSPAN)对森林群落进行分类。研究区可分为4种群落类型,其中,藏柏群落(群落Ⅰ)物种组成相对丰富,有41科63属66种,巨柏群落(群落Ⅱ~Ⅳ)共有17科31属35种;巨柏与藏柏群落内不存在优势科(属),单种属是两者植物区系的重要组成,在科的组成上,单种科为巨柏群落的重要组成,寡种科是藏柏群落的主要组成;在科级区系成分中,巨柏与藏柏群落以世界分布成分最多,温带性质成分次之(其中北温带分布型最多),在属级区系成分中,两者以温带地理成分最多(其中北温带分布型最多),其中巨柏群落以世界分布成分次之,还有一定比例的中国特有属,藏柏群落以热带地理成分次之,在种级区系成分中,巨柏群落以中国特有成分最多,温带性质成分次之,藏柏群落以温带性质成分最多,中国特有成分及热带地理成分次之(两者比重相当)。巨柏群落与藏柏群落具有物种组成复杂、抗逆性低、群落间相似程度低的特点,群落内单种科(属)在数量上占明显优势,其中,巨柏群落科、属组成相对分散,属于相对古老的植物区系。从科、属、种的分布类型统计分析,巨柏群落与藏柏群落整体上具有温带性质,其中,藏柏群落温带性质显著,还表现出较强的热带性质,巨柏群落特有现象明显。
In order to provide a theoretical basis for Tibet Cupressus communities long-term stability updating, their flora was studied, which were located in Nang County, Mainling County and Bomê County.（Method） Setting up typical plots to investigate the communities, and they were classified by bidirectional indicator species（TWINSPA）. The survey regions could bedivided into 4 community types, among these types, the species composition of Cupressus torulosa communities（community I） was relatively abundent, with 41 families, 63 genera and 66 species, and there was a total of 35 species, 31 genera and 17 families of Cupressus gigantea communities（community II^IV）. There was no dominant family（genera） in communities of Cupressus gigantea and Cupressus torulosa, and single-species genus was the significant composition of both flora. In the composition of families, single-species family was the significant composition of Cupressus gigantea communities, and few-species family was a significant component of Cupressus torulosa communities. In the composition of flora in family level, world distribution component was the largest component of Cupressus torulosa communities and Cupressus gigantea communities, the next was temperate component（north temperate zone was the largest distributed type）, in the flora component of genus level,temperate geographic component was the largest component of both（north temperate zone was the largest distributed type）, the next was world distribution component in Cupressus gigantea communities, but tropical geographic component in Cupressus torulosa communities, and there was also a certain proportion of China endemic genus in Cupressus gigantea communities, in the flora component of species level, China endemic component was the largest component of Cupressus gigantea communities, the next was temperate geographic component, but in Cupressus torulosa communities, temperate geographic component was the largest. The next were China endemic component and tropical geographic component（the proportion of the two was almost equivalent）. Cupressus gigantea communities and Cupressus torulosa communities had the characteristics of complex species composition, low stress resistance, and low similarity among communities, the number of single-species family（genus） in the communities occupied an obvious advantage, among the single-species families（genus）, the families＇ composition and genera of Cupressus gigantea communities were relatively scattered, which belonged to the older flora. Statistical analysis of distribution types from families, genera and species indicated that all of them had temperate nature. Among them, Cupressus torulosa communities was remarkable in temperate nature and also showed a strong tropical nature, Cupressus gigantea communities had obvious endemic phenomena.
作者
池翔
郑维列
郭其强
汪书丽
李慧娥
CHI Xiang;ZHENG Weilie;GUO Qiqiang;WANG Shuli;LI Huie(Res.Institute of Tibet Plateau Ecology,Tibet Agricultural and Animal Husbandry University,Nyingchi Tibet,860000 China;Tibet Key Laboratory of Forest Ecology in Plateau Area,Ministry of Education,Nyingchi Tibet,860000 China;National Key Station of Field Scientific Observation ＆ Experiment in Nyingchi Tibet,Nyingchi Tibet,860000 China;Guizhou University,College of Forest,Kweiyang GuiZhou,550025 China;Guizhou University,College of Agriculture,Kweiyang GuiZhou,550025 China)
出处
《高原农业》
2018年第1期1-12,共12页
Journal of Plateau Agriculture
基金
国家自然科学基金"西藏柏木属植物保护遗传学研究及核心种质构建"(No.31460207)
