生物多样性 ›› 2023, Vol. 31 ›› Issue (5): 22345.  DOI: 10.17520/biods.2022345

• 研究报告: 植物多样性 •    下一篇

福建海岛滨海特有植物种-面积关系及物种丰富度决定因素

谢艳秋1, 黄晖1,2, 王春晓1, 何雅琴3, 江怡萱1, 刘子琳1, 邓传远1,*(), 郑郁善1   

  1. 1.福建农林大学风景园林与艺术学院, 福州 350002
    2.福建水利电力职业技术学院, 福建三明 365000
    3.广西大学林学院, 南宁 530004
  • 收稿日期:2022-06-24 接受日期:2023-04-10 出版日期:2023-05-20 发布日期:2023-05-19
  • 通讯作者: * E-mail: dengchuanyuan@fafu.edu.cn
  • 基金资助:
    福建省区域发展科技计划(2018Y3006);福建农林大学艺术学院园林学院学科专业建设(YSYLbdpy3);福建农林大学科技创新专项基金(CXZX2019086);撂荒沙地适生物种引种研究与应用示范技术(115/KH230123A)

Determinants of species-area relationship and species richness of coastal endemic plants in the Fujian islands

Yanqiu Xie1, Hui Huang1,2, Chunxiao Wang1, Yaqin He3, Yixuan Jiang1, Zilin Liu1, Chuanyuan Deng1,*(), Yushan Zheng1   

  1. 1. College of Landscape Architecture and Art, Fujian Agriculture and Forestry University, Fuzhou 350002
    2. Fujian College of Water Conservancy and Electric Power, Sanming, Fujian 365000
    3. College of Forestry, Guangxi University, Nanning 530004
  • Received:2022-06-24 Accepted:2023-04-10 Online:2023-05-20 Published:2023-05-19
  • Contact: * E-mail: dengchuanyuan@fafu.edu.cn

摘要:

福建海岛具有丰富的滨海特有植物资源, 研究其物种丰富度的分布格局及机制, 能够为滨海特有植物资源保护提供依据。本研究探讨了福建53个海岛滨海特有植物的种-面积关系, 以及景观、人为干扰和气候3个方面10个环境因子对滨海特有植物物种丰富度的影响。同时还探讨了不同生活型(乔木、灌木、草本)对海岛环境因子的响应。结果表明: 滨海特有植物和不同生活型植物的种-面积关系呈现物种丰富度随着面积增加而增加的趋势, 滨海特有植物、乔木、灌木和草本的种-面积关系的斜率(z)分别为0.16、0.15、0.15和0.14。景观环境因子中的面积、形状指数和周长面积比是解释福建海岛滨海特有植物及不同生活型植物物种丰富度的主要决定因素, 滨海特有植物及各生活型植物物种丰富度随着面积和形状指数的增加而增加, 而滨海特有植物、灌木和草本的物种丰富度随着周长面积比的增加而减少。此外, 不同生活型植物的物种丰富度对海岛环境因子的响应存在差异, 除景观方面的因子外, 气候对乔木的解释率最大, 达9.82%。综上所述, 相比于其他海岛生态系统, 福建海岛滨海特有植物及不同生活型植物的物种丰富度与面积密切相关, 其较低的斜率(z)表明滨海特有植物对海岛生境的敏感性较弱。景观方面的环境因子相比气候和人为干扰方面贡献了更多的解释率。以往研究发现岛屿环境因子与生境异质性显著相关, 如岛屿越大、形状越不规则、周长面积比越低, 则生境异质性越高。因此生境异质性的提升可能是解释滨海特有植物丰富度随景观环境因子变化的内在机制。

关键词: 物种丰富度, 岛屿生物地理学, 生活型, 种-面积关系, 生境异质性

Abstract

Aim: Fujian Province is made up of numerous islands that are rich in endemic plant resources. Conducting research on their distribution patterns and mechanisms of diversification can provide a basis for conservation and protection of coastal endemic plants. Our aim is to investigate the distribution patterns and mechanisms of species richness of coastal endemic plants in Fujian islands.
Methods: This study investigated the species-area relationship of coastal endemic plants in 53 islands of Fujian Province as well as the impact of 10 environmental factors on plant species richness from three sources: landscape, human disturbance, and climate. Differential responses by various growth forms of plants, such as trees, shrubs, and herbs, to environmental factors were also discussed.
Results: The species-area relationship between coastal endemic plants and different growth forms of plants showed a trend of increasing species richness with increasing area. The area, shape index, and perimeter area ratio of environmental factors of the landscape were the main factors that explain the abundance of coastal endemic plants and different growth forms of species on Fujian islands. Both the coastal endemic plants and their differing growth forms increased as the area and shape index increased, while the coastal endemic plants species richness as well as shrub and herb richness decreased with an increase in the perimeter area ratio. Further, the various growth forms exhibited differential species richness responses to island environmental factors. Apart from landscape factors, climate had the highest interpretation rate for trees, reaching 9.82%.
Conclusion: Compared to other island ecosystems, the species richness of coastal endemic plants and different growth forms in the Fujian islands is strongly correlated with island area, but are less sensitive to island habitats. Landscape environmental factors contributed more to the interpretation rate than climate and human disturbance. Previous studies have found that island environmental factors are significantly correlated with habitat heterogeneity. For example, the larger the island, the more irregular its shape, and the lower its perimeter area ratio, the higher the habitat heterogeneity. Therefore, the high level of habitat heterogeneity in this study may be the underlying mechanism that explains the changes in coastal endemic plant abundance with landscape environmental factors.

Key words: species richness, island biogeography, growth form, species-area relationship, habitat heterogeneity