生物多样性 ›› 2024, Vol. 32 ›› Issue (4): 24010.  DOI: 10.17520/biods.2024010

• 研究报告: 植物多样性 • 上一篇    下一篇

浙江钱江源-百山祖国家公园庆元片区叶附生苔多样性及其时空变化

吴琪1, 张晓青2, 杨雨婷1, 周艺博1, 马毅3, 许大明4,*(), 斯幸峰5,6, 王健1,6,*()   

  1. 1.华东师范大学生命科学学院, 上海 200241
    2.丽水学院生态学院, 浙江丽水 323000
    3.钱江源-百山祖国家公园龙泉保护中心, 浙江丽水 323000
    4.钱江源-百山祖国家公园庆元保护中心, 浙江丽水 323000
    5.华东师范大学生态与环境科学学院, 上海 200241
    6.上海崇明生态研究院, 上海 202162
  • 收稿日期:2024-01-11 接受日期:2024-03-14 出版日期:2024-04-20 发布日期:2024-05-06
  • 通讯作者: * E-mail: 13906880802@163.com;jwang@bio.ecnu.edu.cn
  • 基金资助:
    国家自然科学基金(32070228);百山祖国家公园科研项目(2021KFLY09)

Spatio-temporal changes in biodiversity of epiphyllous liverworts in Qingyuan Area of Qianjiangyuan-Baishanzu National Park, Zhejiang Province

Qi Wu1, Xiaoqing Zhang2, Yuting Yang1, Yibo Zhou1, Yi Ma3, Daming Xu4,*(), Xingfeng Si5,6, Jian Wang1,6,*()   

  1. 1 School of Life Sciences, East China Normal University, Shanghai 200241
    2 Department of Ecology, Lishui University, Lishui, Zhejiang 323000
    3 Longquan Conservation Center, Qianjiangyuan-Baishanzu National Park, Lishui, Zhejiang 323000
    4 Qingyuan Conservation Center, Qianjiangyuan-Baishanzu National Park, Lishui, Zhejiang 323000
    5 School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241
    6 Shanghai Insitute of Eco-Chongming (SIEC), Shanghai 202162
  • Received:2024-01-11 Accepted:2024-03-14 Online:2024-04-20 Published:2024-05-06
  • Contact: * E-mail: 13906880802@163.com;jwang@bio.ecnu.edu.cn

摘要:

叶附生苔是苔藓植物中特有率最高的一个类群, 特殊的生理生态特性使其对气候变化及人为干扰极为敏感, 成为苔藓植物中最需要关注和保护的一个类群。为了解叶附生苔物种多样性及组成随时间变化的规律, 我们以钱江源-百山祖国家公园庆元片区为研究对象, 针对该区域内有叶附生苔历史调查记录且物种较为丰富的3个保护点(百山祖、十九源、五岭坑)进行叶附生苔类植物调查, 比较并分析这3个保护点叶附生苔类植物的物种丰富度、分类β多样性及功能β多样性在时间(1990-2020年)和空间两个维度上的变化。结果表明, 该片区共有叶附生苔类植物4科10属31种。与历史数据相比, 本次调查新增叶附生苔7种, 但有14种未采集到。在所调查的3个保护点中, 仅五岭坑的物种数上升, 百山祖和十九源的物种数均下降。30年来, 各保护点的叶附生苔总的功能丰富度都呈下降趋势, 百山祖的物种分类β多样性及功能β多样性在3个保护点中最高; 物种分类β多样性主要是由周转组分构成, 相反, 功能β多样性主要是由嵌套组分构成。与30年前相比, 3个保护点之间的物种分类β多样性及功能β多样性均呈上升趋势, 表明物种异质化现象有增加的趋势。鉴于叶附生苔物种组成随时间的明显变化, 以及不同地区之间物种组成差异随时间的加剧情况, 建议在我国其他叶附生苔分布中心开展类似的调查和比较研究, 以期及时更新物种名录, 同时结合国家公园的建设契机, 加强对叶附生苔不同分布点之间的联通保护。

关键词: 气候变化, 物种分类β多样性, 物种功能β多样性, 生物异质化, 生物均质化

Abstract

Aims: Epiphyllous liverworts are a unique group with the highest endemism rate amongst bryophytes. Their special physiological and ecological characteristics make them extremely sensitive to climate change and anthropogenic disturbances, rendering them one of the most important groups of bryophytes in need of monitoring and protection. To understand temporal variation in the composition and diversity of epiphyllous liverworts species from 1990 to 2020, the present study conducted systematic sampling and comparative analysis of epiphyllous liverworts in the Qingyuan Area of Qianjiangyuan-Baishanzu National Park, Zhejiang Province.

Methods: Utilizing the Qingyuan Area of Qianjiangyuan-Baishanzu National Park as the study area, systematic investigation of the diversity of epiphyllous liverworts was carried out at three conservation sites (Baishanzu, Shijiuyuan, Wulingkeng) and compared to historical records of epiphyllous liverworts species. Changes in species richness, taxonomic β-diversity, and functional β-diversity of epiphyllous liverworts were then analyzed in both temporal and spatial dimensions.

Results: Thirty-one species of epiphyllous liverworts, belonging to ten genera in four families, were reported in the Qingyuan Area in 2020. Compared with historical data, 7 species of epiphyllous liverworts were newly identified while 14 species were not collected. Among the three sites investigated, the number of epiphyllous liverwort species in Wulingkeng increased over the past 30 years, but the number of species in Baishanzu and Shijiuyuan areas decreased. The total functional richness of epiphyllous liverwort species showed a decreasing trend over time at all conservation sites, but the taxonomic and functional β-diversity of species in Baishanzu were the highest among the three sites. Taxonomic β-diversity analysis showed that “turnover” component was most important, while the “nestedness” component was most important for functional β-diversity. Compared to 30 years ago, the taxonomic and functional β-diversity of the epiphyllous liverworts were on the rise, suggesting a positive trend in species heterogeneity at all three conservation sites.

Conclusion: Given the obvious changes in species composition of epiphyllous liverworts over time, as well as the exacerbation of differences in species composition between different regions over time, it is suggested to conduct similar studies in other centers of occurrence of epiphyllous liverworts in China in order to update species data in a timely manner. It is also suggested to strengthen the connectivity and protection of epiphyllous liverworts between different distribution areas combining with the construction opportunities of national parks.

Key words: climate change, species taxonomic β-diversity, species functional β-diversity, biotic heterogenization, biotic homogenization