摘要
以茂兰国家级喀斯特森林自然保护区为研究对象,对区内不同地形部位植被进行群落学调查,根据调查结果,通过计算重要值,选取22个优势度相对较大的乔木树种进行种间联结及相关性分析,以χ2检验为基础,结合联结系数AC和共同出现百分率PC等方法来测定乔木优势种间的联结性,根据优势种间的联结性及其在不同地形部位的数量变化来划分植物功能群。结果表明,茂兰喀斯特森林优势乔木树种可划分为5组功能型,第一组功能型为轮叶木姜子、黄梨木、梓叶槭、掌叶木、云贵鹅耳枥、翅荚香槐,以轮叶木姜子为优势种,主要分布在坡地地形中;第二组功能型为青冈栎、圆叶乌桕、朴树、齿叶黄皮、桂皮、香港四照花、狭叶润楠、灯台树,以青冈栎为优势种,主要分布在漏斗地形中;第三组功能型为四照花、尾叶罗伞、樟叶槭,以四照花为优势种,主要分布在漏斗地形中;第四组功能型为多脉榆、黄连木,以多脉榆为优势种,较均匀地分布在漏斗、坡地和槽谷地形中;第五组功能型为巴东荚蒾、香叶树、柿树,以巴东荚蒾为优势种,主要分布在槽谷地形中。不同功能型对不同地形部位的适应特征有明显差异。
Plant of different topography sites in Maolan National Nature Reserve was studied using community ecology tech- niques. Species importance values for 22 tree species were calculated and dominant species were identified. X~ test,combined with association coefficient and percentage co-occurrence was used to measure inter-specific associations of the dominant tree species. Delimiting plant functional types （PFTs） were defined according to inter-specific associations and topography sites dis- tributions of the dominant species. The results showed that there were 5 PFTs in Maolan karst forest. F1 included Litsea verti- ciUata, Boniodendron minus, Acer catalpifolium, Handeliodendron bodinieri, Carpinus pubescens and Claclrastis platycarpa, distributed on hillside with Litsea verticillata as dominant species. F2 included Cyclobalanopsis glauca, Sapium rotundifolium, Celtis sinensis, Clausena dunniana, Cinnamomum wilsonii, Dendrobenthamia hongkongensis, Machilus rehderi and Bothro- caryum controversum, distributed in funnel with the Cyclobdanopsis glauca as dominant species. F3 included Comus japoni- cavar chinensis, Brassaiopiss producta and Acer cinnamomifolium, distributed in funnel with the Comus japonicavar chinensis as dominant species. F4 included Ulmus castaneifolia, Pistacia chinensi, distributed in funnel, hillside and valley with Ulmus castaneifolia as dominant species. F5 included Viburnum henryi, Lindera communis and Diospyros kaki, distributed in valley with Viburnum henryi as dominant species. There were much differences between functional types in different topography sites.
出处
《湖北农业科学》
2015年第4期843-847,共5页
Hubei Agricultural Sciences
基金
贵州省自然科学基金项目[黔科合J字(2012)2280号]
关键词
茂兰
喀斯特森林
功能型
优势种
种间联结
Maolan
karst forest
functional types
dominant species
interspecific association
