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草业学报 ›› 2023, Vol. 32 ›› Issue (1): 16-25.DOI: 10.11686/cyxb2022029

• 研究论文 • 上一篇    下一篇

不同恢复年限草地群落水平植物功能性状及功能多样性分析

李江文1,2(), 何邦印1, 李彩1, 回虹燕1,2, 刘博1,2, 张晓曦1,2, 樊慧1, 苏文钰1   

  1. 1.延安大学生命科学学院,陕西 延安 716100
    2.陕西省红枣重点实验室,延安大学,陕西 延安 716100
  • 收稿日期:2022-01-22 修回日期:2022-04-18 出版日期:2023-01-20 发布日期:2022-11-07
  • 通讯作者: 李江文
  • 作者简介:(1987-),男,陕西商洛人,讲师,博士。E-mail: jiangwen-0105@163.com
    李江文(1987-),男,陕西商洛人,讲师,博士。E-mail: jiangwen-0105@163.com
  • 基金资助:
    陕西省自然科学基础研究项目(2021JQ-623);延安大学博士科研启动项目(YDBK2019-18);延安大学大学生创新创业训练计划项目(D2020089)

Analysis of grassland community-level plant functional traits and functional diversity at different times during restoration

Jiang-wen LI1,2(), Bang-yin HE1, Cai LI1, Hong-yan HUI1,2, Bo LIU1,2, Xiao-xi ZHANG1,2, Hui FAN1, Wen-yu SU1   

  1. 1.College of Life Sciences,Yan’an University,Yan’an 716100,China
    2.Shaanxi Key Laboratory of Chinese Jujube,Yan’an University,Yan’an 716100,China
  • Received:2022-01-22 Revised:2022-04-18 Online:2023-01-20 Published:2022-11-07
  • Contact: Jiang-wen LI

摘要:

植物功能性状与功能多样性是评价草地生态系统功能的重要工具。本研究以黄土高原丘陵沟壑区不同恢复年限人工刺槐林林下草地和自然撂荒草地作为研究对象,通过对草地植物群落及功能性状进行调查,分析不同恢复年限草地群落水平植物功能性状及功能多样性动态变化,结果显示:1)林下草地和自然撂荒草地植物群落主要以多年生菊科和蔷薇科为主;2)随恢复年限增加,林下草地植物从以双子叶为主逐渐演替到以单子叶为主,从以菊科为主逐渐演替到以禾本科为主;而撂荒草地物种始终以菊科为主,且在恢复过程中逐渐演替为以灌木和半灌木为主的群落;3)林下草地群落水平叶片功能性状值大于撂荒草地,而群落水平盖度、密度和地上生物量性状小于撂荒草地。撂荒草地物种多样性和功能多样性指数高于林下草地,撂荒草地相较林下草地具有更高的生态效益。本研究可为黄土高原丘陵沟壑区草地生态系统功能评估提供理论依据。

关键词: 黄土高原, 恢复草地, 群落水平性状, 功能多样性, 物种组成

Abstract:

Plant functional traits and functional diversity are important factors when evaluating the function of grassland ecosystems. In this study, we conducted a series of analyses of the understory grassland of Robinia pseudoacacia forests and abandoned grassland at different time points during restoration in the hilly and gully regions of the Loess Plateau. The community-level dynamics of plant functional traits and functional diversity were analyzed during vegetation restoration to explore how the grassland plant community and its functional traits change over time. The results showed that: 1) The understory grassland and abandoned grassland were both dominated by perennial weeds in the Asteraceae and Rosaceae; 2) During restoration, the understory grassland succeeded from a dicot-dominated community to a monocot-dominated community, while Asteraceae species were gradually replaced by Poaceae species. The abandoned grassland was always dominated by Asteraceae species, however, and showed a tendency to shrub encroachment. 3) The values of community-level leaf functional traits were higher in understory grassland than in abandoned grassland, while the values of community-level plant functional traits of coverage, density, and aboveground biomass were lower in understory grassland than in abandoned grassland. The values of species diversity and functional trait diversity were higher in abandoned grassland than in understory grassland, and abandoned grassland exhibited higher ecological benefits. These results provide a theoretical basis for the evaluation of grassland ecosystem functions in the hill and gully region of the Loess Plateau.

Key words: Loess Plateau, restoration grassland, community-level traits, functional diversity, species composition