芦苇叶片、细根功能性状对水盐环境的响应——以闽江流域福州段为例  

Response of reed leaf and fine root functional traits to water and salt environment:a case study of Fuzhou section of the Min River

作　　者：王秋雪 彭书婷 甘婉怡 彭正东 徐琪 王洁[1] 黄柳菁[1] WANG Qiuxue;PENG Shuting;GAN Wanyi;PENG Zhengdong;XU Qi;WANG Jie;HUANG Liujing(College of Landscape Architecture and Art,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]福建农林大学风景园林与艺术学院,福州350002

出　　处：《生态学报》2024年第18期8338-8348,共11页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(32071578);福建省自然科学基金项目(2021J01133)。

摘　　要：湿地植物通过调节自身叶片、细根功能性状增强对环境的适应能力。通过对植物叶片、细根性状间的相互关系及变异趋势的研究,能够有效了解植物地上、地下部分对环境的响应机制、对资源的利用情况以及植物生存策略的变化。本文以闽江流域福州段4个典型湿地为研究区域,以优势种芦苇为研究对象,测定不同水盐环境下芦苇8个叶性状及7个细根性状(形态性状和生态化学计量特征)的变化及其相关性,并探讨芦苇为应对不同水盐环境变化的生存策略。结果表明:芦苇叶片、细根功能性状对土壤含水量的响应较土壤含盐量更强烈。部分叶片、细根性状呈现显著相关;同时随着土壤含水量、含盐量的增加,芦苇地上、地下部分N含量之间和C:N之间呈正相关关系;而C含量之间呈负相关关系,体现芦苇对不同水盐环境的适应性。本研究中芦苇的叶片性状并不能反映其生存策略;在土壤含水量、含盐量高的环境下,细根采取“获取型”策略,整株的生存策略也偏向于“快速投资-收益型”;而在土壤含水量、含盐量低的环境下,细根与整株的生存策略则倾向于缓慢投资的一侧。综上体现了不同水盐环境下芦苇地上、地下部分的关联性以及种内变异表现出不同的生态策略,揭示了湿地植物在异质生境下独特的调节机制。Wetland plants can enhance their adaptability to the environment by adjusting their leaf and fine root functional traits.Through the study of the relationship and variation trend of leaf and root traits,we can effectively understand the response mechanism of above-ground and underground plants to the environment,the utilization of resources and the change of plant survival strategy.In this paper,4 typical wetlands in Fuzhou section of the Min River were selected as research areas,and the dominant species reed was selected as research objects.The changes and correlations of 8 leaf traits and 7 fine root traits(morphological traits and ecological stoichiometric characteristics)of reed were measured under different water and salt environments,and the survival strategies of reed to cope with the changes of different water and salt environments were discussed.The results showed that the responses of reed leaf and fine root to soil water content were stronger than that of soil salt content.There was significant correlation between leaf and fine root characters.At the same time,with the increase of soil water content and salt content,N and C:N in the ground and underground parts of reed were positively correlated.The C content showed a negative correlation,reflecting the adaptability of reed to different water and salt environments.The leaf traits of reed in this study could not reflect its survival strategy.In the environment of high soil water and salt content,fine roots adopted the"acquisition"strategy,and the survival strategy of the whole plant was also inclined to the"fast investment-return"strategy.However,in the environment of low soil water and salt content,the survival strategy of fine root and whole plants tended to be on the side of slow investment.These results reflect the correlation between the above-ground and subsurface parts of reed under different water and salt environments,as well as the different ecological strategies of intraspecific variation,reflecting the unique regulatory mechanisms of wetland

关 键 词：植物功能性状 生态策略 叶片 细根 湿地 

分 类 号：Q948[生物学—植物学]