2024年2月25日 星期日
西藏墨脱典型区域藓类植物的物种组成及区系特征初步研究
Preliminary study on the species composition and floristic characteristics of mosses in typical areas in Medog of Tibet, China
2023年 第32卷 第5期 页码[51-61]    下载全文[0.9MB]  
摘要

为研究西藏墨脱典型区域藓类植物的多样性和区系特征,采用线路采集和普采的方法对该地区藓类植物进行调查、标本采集、物种鉴定和区系分析。结果表明:墨脱典型区域共有藓类植物43科169属412种(含亚种、变种和变型,下同),共有12个优势科、14个优势属和13个优势种。其中,优势科分别为珠藓科(Bartramiaceae)、青藓科(Brachytheciaceae)、真藓科(Bryaceae)、曲尾藓科(Dicranaceae)、绢藓科(Entodontaceae)、紫萼藓科(Grimmiaceae)、灰藓科(Hypnaceae)、蔓藓科(Meteoriaceae)、提灯藓科(Mniaceae)、金发藓科(Polytrichaceae)、丛藓科(Pottiaceae)和羽藓科(Thuidiaceae),这12个优势科含102属304种,分别占该地区藓类植物总科数、总属数和总种数的27.9%、60.3%和74.0%;优势属分别为扭口藓属(Barbula Hedw.)、青藓属(Brachythecium B. S. G.)、真藓属(Bryum Hedw.)、对齿藓属(Didymodon Hedw.)、绢藓属(Entodon Müll. Hal.)、美喙藓属(Eurhynchium B. S. G.)、紫萼藓属(Grimmia Ehrh. ex Hedw.)、灰藓属(Hypnum Hedw.)、泽藓属(Philonotis Brid.)、匐灯藓属(Plagiomnium T. Kop.)、棉藓属(Plagiothecium B. S. G.)、小金发藓属(Pogonatum P. Beauv.)、丝瓜藓属(Pohlia Hedw.)和羽藓属(Thuidium B. S. G.),这14个优势属含144种,占该地区藓类植物总种数的35.1%。墨脱典型区域藓类植物区系划分为10个分布区类型,以东亚分布、温带分布、中国特有分布和热带亚洲分布为主,所含种数分别占该地区藓类植物总种数的30.1%、25.2%、10.4%和8.5%,说明该地区藓类植物区系以温带成分为主,兼具热带性质。综上所述,墨脱典型区域藓类植物丰富,具有热带—温带过渡区的特征。
 

Abstract

In order to study the diversity and floristic characteristics of mosses in typical areas in Medog of Tibet, investigation, specimen collection, species identification, and floristic analysis were conducted for mosses in this area by using line collection and general collection methods. The results show that there are 412 species (including subspecies, variety, and form, the same below) of mosses belonging to 169 genera of 43 families in typical areas of Medog, and there are 12 dominant families, 14 dominant genera, and 13 dominant species in total. In which, the dominant families are Bartramiaceae, Brachytheciaceae, Bryaceae, Dicranaceae, Entodontaceae, Grimmiaceae, Hypnaceae, Meteoriaceae, Mniaceae, Polytrichaceae, Pottiaceae, and Thuidiaceae, and these 12 dominant families contain 304 species of 102 genera, accounting for 27.9%, 60.3%, and 74.0% of the total family number, total genus number, and total species number of mosses in this area, respectively; the dominant genera are Barbula Hedw., Brachythecium B. S. G., Bryum Hedw., Didymodon Hedw., Entodon Müll. Hal., Eurhynchium B. S. G., Grimmia Ehrh. ex Hedw., Hypnum Hedw., Philonotis Brid., Plagiomnium T. Kop., Plagiothecium B. S. G., Pogonatum P. Beauv., Pohlia Hedw., and Thuidium B. S. G., and these 14 dominant genera contain 144 species, accounting for 35.1% of the total species number of mosses in this area. The flora of mosses in typical areas of Medog are divided into 10 arealtypes, among which the main arealtypes are East Asian, temperate, endemic to China, and tropical Asia, and their species numbers account for 30.1%, 25.2%, 10.4%, and 8.5% of the total species number of mosses in this area respectively, indicating that the flora of mosses in this area are mainly of temperate components with tropical properties. In conclusion, the mosses in typical areas of Medog are rich, and they have the characteristics of tropical-temperate transition zone.
 

关键词藓类植物; 物种多样性; 植物区系; 墨脱
Key wordsmoss; species diversity; flora; Medog
作者马和平a,b,c,d, 司孟鑫a,b,c,d, 王彪a,b,c,d, 陈利a,b,c,d
所在单位西藏农牧学院: a. 高原生态研究所, b. 西藏高原森林生态教育部重点实验室, c. 西藏林芝高山森林生态系统国家野外科学观测研究站, d. 西藏自治区高寒植被生态安全重点实验室, 西藏 林芝 860000
点击量335
下载次数288
基金项目国家自然科学基金项目(32060264); 西藏自治区2023年科技计划项目(XZ202301ZY0041G); 西藏农牧学院农业资源与环境学科建设项目(2023)