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草业学报 ›› 2021, Vol. 30 ›› Issue (4): 140-149.DOI: 10.11686/cyxb2020192

• 研究论文 • 上一篇    下一篇

甘肃多儿国家级自然保护区维管植物区系分析

史生晶1(), 高军2, 王春霞2, 蒋震2, 陈学林1()   

  1. 1.西北师范大学生命科学学院,甘肃 兰州 730070
    2.甘肃省野生动植物管理局,甘肃 兰州 730050
  • 收稿日期:2020-04-28 修回日期:2020-05-25 出版日期:2021-04-20 发布日期:2021-03-16
  • 通讯作者: 陈学林
  • 作者简介:Corresponding author. E-mail: chenxuelin@163.com
    史生晶(1994-),女,甘肃白银人,在读硕士。E-mail: 2067520391@qq.com
  • 基金资助:
    澳门特别行政区大熊猫基金项目资助

Analysis of the floristic diversity of vascular plants in Duoer National Nature Reserve, Gansu

Sheng-jing SHI1(), Jun GAO2, Chun-xia WANG2, Zhen JIANG2, Xue-lin CHEN1()   

  1. 1.College of Life Sciences,Northwestern Normal University,Lanzhou 730070,China
    2.Gansu Wildlife Administration,Lanzhou 730050,China
  • Received:2020-04-28 Revised:2020-05-25 Online:2021-04-20 Published:2021-03-16
  • Contact: Xue-lin CHEN

摘要:

基于野外实地考察、植物标本的采集与鉴定以及结合文献研究的方法,分析了多儿保护区维管植物区系的物种组成和分布区类型。结果表明,该区维管植物共115科469属1323种,包括蕨类植物14科25属61种,裸子植物4科8属25种,被子植物97科436属1237种。多儿保护区维管植物区系优势现象明显,≥20种的优势科共879种,占该区维管植物总种数的66.44%;小属和单种属成分比例较大,占该区维管植物总属数的95.31%,总种数的75.51%。科级水平上,热带科(30.43%)稍多于温带科(26.96%);属级水平上,温带科(72.49%)明显高于热带科(13.01%);种级水平上,中国特有种有545种,其中538种与周边省份所共有,体现了该区系明显的过渡性和交汇性。该保护区维管植物区系地理成分复杂多样,属的分布有15个分布型和5个变型,温带地理成分占绝对优势,尤其以北温带分布为主。该区珍稀濒危野生植物较多,被列入保护名录有37种;一些古老、孑遗植物在该保护区具有良好的原始类群分布。本研究进一步完善了多儿保护区维管植物区系特征,为以后了解该保护区生物多样性提供可靠依据。

关键词: 多儿保护区, 维管植物, 区系分析, 地理成分

Abstract:

This paper reports an analysis of the species composition and distribution types of vascular plants in Duoer National Nature Reserve, based on field investigation, plant collection specimens and literature research. We found that there were 1323 species of vascular plants present in the study area. These belong to 469 genera and 115 families, among which 61 species belonging to 25 genera and 14 families were pteridophytes, 25 species belonging to eight genera and four families were gymnosperms, and 1237 species belonging to 436 genera and 97 families were angiosperms. The floristic diversity of the dominant vascular plant species in Duoer Reserve was obvious, in that 879 species (66.44% of those present) were found to belong to a dominant family with 20 or more species represented. There was a relatively high ratio of monotypic genera or oligotypic genera and these accounted for 95.31% of the total genera and 75.51% of the total species present in the basin. At the family level, tropical families (30.43%) were slightly more numerous than families of temperate origin (26.96%). At the genus level, the temperate families (72.49%) were significantly more numerous than the tropical families (13.01%). At the species level, there were 545 endemic species, of which 538 species were also found in surrounding provinces, reflecting the obvious transition between and convergence of different floral assemblages in this region. The geographical composition of vascular flora in this reserve was complex and diverse, and there were 15 geographic distribution types and five variants among the genera present. Species of temperate geographic distribution type were dominant, especially those of north temperate distribution. There were many rare and endangered wild plants present in this area, and 37 species were listed as protected. Some ancient relict plants had a good primitive distribution in the reserve. The study has improved knowledge of the floristic characteristics of vascular plants in Duoer National Nature Reserve and provided strong foundation for building understanding of plant species biodiversity in the reserve in the future.

Key words: Duoer National Nature Reserve, vascular plant, floral analysis, components of landscape