植物生态学报 ›› 2024, Vol. 48 ›› Issue (5): 601-611.DOI: 10.17521/cjpe.2023.0201  cstr: 32100.14.cjpe.2023.0201

所属专题: 植物功能性状

• 研究论文 • 上一篇    下一篇

长江中游河漫滩湿地植物功能性状分析

李闪闪1,2, 刘学勤1,*()   

  1. 1中国科学院水生生物研究所, 武汉 430072
    2中国科学院大学, 北京 100049
  • 收稿日期:2023-07-11 接受日期:2024-01-03 出版日期:2024-05-20 发布日期:2024-06-13
  • 通讯作者: (xqliu@ihb.ac.cn)

Analysis of functional traits of wetland plants in floodplains in middle reaches of Yangtze River

LI Shan-Shan1,2, LIU Xue-Qin1,*()   

  1. 1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2023-07-11 Accepted:2024-01-03 Online:2024-05-20 Published:2024-06-13
  • Contact: (xqliu@ihb.ac.cn)

摘要:

功能性状能单独或联合反映植物对环境变化的响应和适应策略并影响生态系统功能, 探究河漫滩湿地植物功能性状及其空间特征, 对理解河漫滩湿地植物的生态适应性机制具有重要意义。该研究选取武汉周边5条河流, 对30种常见湿地草本植物的10个功能性状进行测定, 对性状之间的相关关系、性状空间质量、性状重要性及物种在空间的分布进行了分析。结果显示, 植物功能性状变异较大, 性状与性状之间关联较弱; 在功能性状空间中, 当维度从1维增加至4维时, 空间质量快速上升, 6维空间质量最高; 综合降维及空间质量, 分析了4维性状空间的特征, 在4维空间中, 寿命、地下茎、株高、叶面积、比叶面积、叶干物质含量、叶氮含量以及叶碳含量与性状功能轴存在显著的相关关系, 对功能性状空间的构建具有重要作用; 16种植物位于凸包顶点, 其中有10种植物出现频率较高, 表明大部分湿地植物在性状上都有一定的独特性, 在塑造性状空间中有重要作用。

关键词: 物种分布, 空间质量, 性状重要性, 性状-性状关系

Abstract:

Aims Functional traits can individually or jointly reflect the response of plants to environmental changes and their adaptation strategies and are closely linked to ecosystem functioning. Exploring the functional traits and trait space characteristics of wetland plants is of importance for understanding the mechanisms underlying the ecological adaptability of wetland plants in river floodplains.

Methods We measured 10 functional traits of 30 common herbaceous plants in 5 river floodplains around Wuhan in middle reaches of Yangtze River. We then analyzed the relationships among traits, the quality of trait space, the importance of traits, and the distribution of species in trait space.

Important findings The results showed that variations in functional traits were large among wetland plant species and that trait-trait relationships were generally weak. The quality of trait space increased rapidly when the dimension of space increased from one to four, with the six-dimensional space being of the highest quality. Considering a tradeoff between dimension reduction and space quality, we chose the four-dimensional space for subsequent analyses. In the four-dimensional space, life span, rhizome, plant height, leaf area, specific leaf area, leaf dry matter content, leaf nitrogen content and leaf carbon content were significantly correlated with the axes of the trait space, indicating that they played an important role in shaping the trait space of wetland plants. Sixteen species were located at the vertices of the convex hull, of which ten had high frequencies of occurrence, indicating that these species hold unique trait values and might be more important in shaping the trait space than other species.

Key words: species distribution, quality of space, trait importance, trait-trait relationship