生物多样性 ›› 2024, Vol. 32 ›› Issue (11): 24175.  DOI: 10.17520/biods.2024175  cstr: 32101.14.biods.2024175

• 生物入侵专题 • 上一篇    下一篇

植物入侵导致群落谱系结构更加聚集: 以广西国家级自然保护区草本植物为例

杨向林1,2(), 赵彩云1,*()(), 李俊生3, 种方方1,4(), 李文金2()   

  1. 1.中国环境科学研究院生态研究所, 北京 100012
    2.兰州大学生态学院, 兰州 730000
    3.中国地质调查局自然资源综合调查指挥中心, 北京 100055
    4.郑州大学生态与环境学院, 郑州 450001
  • 收稿日期:2024-05-09 接受日期:2024-07-17 出版日期:2024-11-20 发布日期:2024-08-01
  • 通讯作者: E-mail: zhaocy@craes.org.cn
  • 基金资助:
    生物多样性调查评估项目(2019HJ2096001006);国家重点研发计划(2016YFC1201100)

Invasive plant species lead to a more clustered community phylogenetic structure: An analysis of herbaceous plants in Guangxi’s national nature reserves

Xianglin Yang1,2(), Caiyun Zhao1,*()(), Junsheng Li3, Fangfang Chong1,4(), Wenjin Li2()   

  1. 1. Institue of Ecology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
    2. College of Ecology, Lanzhou University, Lanzhou 730000, China
    3. Command Center for Comprehensive Survey of Natural Resources, China Geological Survey Bureau, Beijing 100055, China
    4. College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
  • Received:2024-05-09 Accepted:2024-07-17 Online:2024-11-20 Published:2024-08-01
  • Contact: E-mail: zhaocy@craes.org.cn
  • Supported by:
    Biodiversity Survey and Assessment Project(2019HJ2096001006);National Key Research and Development Program(2016YFC1201100)

摘要:

外来植物入侵威胁着自然保护区的原生群落结构和生态系统功能, 其中以草本植物尤为明显。为明晰外来入侵草本物种组成及其对保护区植物群落谱系结构的影响, 本研究对广西13个国家级自然保护区进行了野外调查, 基于1,046个样方数据并结合从GenBank获取的rbcLmatK和ITS核苷酸序列构建系统发育树, 以平均系统发育距离的标准化效应(the standardized effect size of MPD, SES.MPD)和平均最邻近系统发育距离的标准化效应(the standardized effect size of MNTD, SES.MNTD)两个指标衡量草本群落的谱系结构变化。 结果表明: (1) 13个保护区共发现外来入侵草本植物47种, 隶属于15科38属, 32种(68.1%)为严重和恶性入侵类, 且主要是原产于美洲的一年生菊科草本。所调查的保护区均遭受入侵, 大明山保护区外来入侵植物数量最高, 达24种, 元宝山保护区外来入侵植物数量最低, 仅为5种。(2)在两种系统发育度量水平上, 无论原生草本群落的谱系结构是聚集还是发散, 8个(61.5%)保护区均由于外来物种入侵而导致草本群落的聚集性增加。本研究从系统发育的角度探索了外来入侵植物对生物多样性的影响, 为未来自然保护区的入侵植物防控提供了理论基础。

关键词: 国家级自然保护区, 草本植物, 群落系统发育结构, 外来入侵效应

Abstract

Aims: Invasive alien plants, particularly herbaceous species, posed a threat to the native community structure and ecosystem functions of nature reserves. This study aims to investigate the influence of invasive alien herbs on the phylogenetic structure of plant communities across 13 national nature reserves in Guangxi.

Methods: A total of 1,046 plots were surveyed for herbaceous plants in 13 national nature reserves. A phylogenetic tree was constructed using species data and nucleotide sequences, including the rbcL, matK, and ITS obtained from GenBank. The structural composition of herb communities was assessed using standardized effect sizes of mean phylogenetic distance and mean nearest-taxon distance (SES.MPD and SES.MNTD). R software was used to visualize the phylogenetic changes in herb communities following the naturalization of invasive alien herbs.

Results (1) Forty-seven species of invasive alien herb plants (from 38 genera and 15 families) were recorded in 13 national nature reserves. Thirty-two (68.1%) of these species were classified as serious and malignant invasive species, predominantly comprising annual Asteraceae herbs originating from the Americas. Each national nature reserve were affected by invasive alien herbs, with the highest number of species found in Damingshan National Nature Reserve (24 species) and the lowest number found in Yuanbaoshan National Nature Reserve (5 species). (2) In eight (61.5%) national nature reserves, the introduction of invasive alien herbs consistently led to reduced phylogenetic diversity at two phylogenetic levels, regardless of whether these communities were initially clustered or overdispersed. This reduction indicated increased phylogenetic clustering among herb communities.

Conclusion: Compared to communities composed solely of native species, the inclusion of invasive alien species leads to a more clustered phylogenetic structure. We examined the impacts of alien invasion on biodiversity from a phylogenetic perspective, provides a theoretical foundation for future prevention and management of invasive alien plants in nature reserves.

Key words: national nature reserves, herbaceous species, community phylogenetic structure, alien invasion effect