学术
四川黄龙沟森林植被中兰科植物群落优势种种间联结和相关分析
黄宝强[2,3,4] 罗毅波[1,2] 于飞海[5] 唐思远[6] 董立[6] 安德军[6]
[1]全国兰科植物种质资源保护中心,深圳518114 [2]中国科学院植物研究所系统与进化植物学国家重点实验室,北京100093 [3]中国科学院研究生院,北京100049 [4]南昌工程学院,南昌330099 [5]中国科学院植物研究所植被与环境变化重点实验室,北京100093 [6]四川省黄龙国家级风景名胜区管理局,四川黄龙624000
摘 要:
四川黄龙沟内分布着十分丰富的兰科植物（19属30余种），并且部分种类在沟内形成优势群落。目前尚不清楚在群落中这些兰科植物种之间作用关系。运用种间关联分析和相关分析对黄龙沟森林植被兰科植物群落中的24个优势种的种间关系进行了研究。两种分析方法得到的结果相近，表明黄龙沟优势兰科植物可以分为两组。一组包括无苞杓兰（Cypripedium bardolphianum）、黄花杓兰（C．flavum）、二叶红门兰（Orchis diantha）、广布红门兰（Orchis chusua）、少花虾脊兰（Calanthe delavayi）和西藏杓兰（C．tibeticum），主要分布在光线充足但又具有一定遮荫条件的环境中；另一组包括筒距兰（Tipularia szechuanica）、沼兰（Malaxis monophyllos）、珊瑚兰（Corallorhiza trifida）、小斑叶兰（Goodyera repens）、布袋兰（Calypso bulbosa）、小花舌唇兰（Platanthera minutiflora）和小叶对叶兰（Listera smithii），它们主要分布于荫蔽的环境中。这些兰科植物在组内大多呈现显著的正相关关系，组间大多呈现显著的负相关关系，说明黄龙沟兰科植物在资源利用方式上可能产生了分化。[著者文摘]
文章出处:
《植物生态学报》-2007年31卷5期 -865-872页
栏目信息:
分 类 号:
INTERSPECIFIC RELATIONSHIPS OF DOMINANT SPECIES IN ORCHID COMMUNITIES OF FOREST VEGETATION IN HUANGLONG VALLEY, SICHUAN, CHINA
HUANG Bao-Qiang, LUO Yi-Bo , YU Fei-Hai, TANG Si-Yuan, DONG Li, AN De-Jun（ 1.The National Orchid Conservation Center, Shenzhen 518114, China; 2.State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 4. Nanchang Institute of Technology, Nanchang 330099, China; 5.Key Laboratory of Vegetation and Environmental Change, Institute of Botany, China Academy of Sciences, Beijing 100093, China;3.Huanglong Administration of National Scenic Spot, Huanglong , Sichuan 624000, China）
Abstract:
Aims The Huanglong Valley of Sichuan is rich in orchid species, with 〉 30 species in 19 genera, and some orchids dominate the herbaceous layer. However, little is known about their interspecific relationships. Our aim was to investigate how the orchid species interact with each other and with other species. Methods We sampled 6 621 m × 1 m releves in the orchid communities in Huanglong Valley, selected 24 dominant species according to importance values and studied interspecific associations and correlations by using Χ^2-tests and Spearman rank correlations. Important findings Results of Χ^2-tests of species associations and Spearman rank correlations were consistent and indicated two groups of dominant species. One group, including Cypripedium bardolphianum, C. flavum, C. tibeticum, Orchis diantha, O. chusua and Calanthe delavayi, is mostly distributed where both light and shade are provided by tree overstories. The other group, including Tipularia szechuanica, Malaxis monophyllos, Corallorhiza trifuta, Gooclyera repens, Calypso bulbosa, Platanthera minutiflora and Listera smithii, is mostly distributed in shade. Non-orchid species, Arctous rube, C, entiana scabra, Pedicularis davidii, Elymus nutans and Pinguicula alpine, which are mostly distributed in open areas, are significantly positively correlated with orchid species of the first group, but mostly negatively correlated with the second group. In contrast, Clintonia udensis, Pedicularis humilis and Carex lehmanii, which are mostly distributed in shaded environmental conditions, have reverse correlations with the two orchid groups. Polygonum macrophyllum,Pyrola caUiantha and the orchid Oreorchis nana show no obvious correlations with either ot the orchid groups. Our findings indicate that the interspecific interactions of orchid species of Huanglong Valley are complex and the orchid species may have differentiated with regard to the resource use. Reproductive facilitation may play an important role for orchid species diversity in this area.[著者文摘]
Key words:
Huanglong Valley, orchid species, interspecific relationship
基金资助:
国际科技合作重点计划项目（2001CB711103）中国科学院植物研究所张树仁研究员和陈文莉博士鉴定了部分标本.本研究还得到中国科学院植物研究所.黄龙国家级风景名胜区管理局合作研究博士工作站的大力支持,在此一并表示感谢
更多>>免费文章
cqvip.com