闽江河口湿地互花米草与芦苇光合特性及适应性研究  

A Comparison of Photosynthetic Characteristics and Adaptability Between Spartina alterniflora and Phragmites australis in Min River Estuary Wetland

作　　者：林培治[1] 李守中[1] 赵颖[1] 王英杰[1] 

机构地区：[1]福建师范大学湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福州350007

出　　处：《湿地科学与管理》2012年第4期45-48,共4页Wetland Science & Management

基　　金：福建省教育厅项目(JB10039);福建省长乐市科技发展项目;人才培养模式创新实验区项目(N200902004)

摘　　要：互花米草在闽江河口鳝鱼滩湿地中潮滩的入侵及快速扩张,已严重威胁到鳝鱼滩湿地的生物多样性及土著种沼泽植物生态系统的结构与功能。为了从植物光合速率的角度分析互花米草入侵及快速扩张的生理生态学机制,利用Li-6400便携式光合作用仪测定了互花米草与土著种芦苇的光合速率日进程及光合光响应曲线。结果表明,互花米草净光合速率的日均值与最大值均大于芦苇,互花米草可积累更多的光合作用产物,使其具有更快的生长速率和初级生产力。根据两种植物的光合光响应曲线可以看出,互花米草利用光合有效辐射的能力更强,显示出互花米草的高适应性。In Min River Estuary wetland, Spartina alterni/7ora has rapidly diffused and encroached upon the local plants＇ habitat. As an invasive plant, Spartina alterniflora has become a threat to the local ecosystem. Understanding how the invasive plant Spartina alternO%ra encroached successfully and the physiological and ecological mechanisms is one of the current hot topics in invasion ecology. Li-6400 Portable Photosynthesis （LI-COR inc. USA） was used to measure the photosynthetic characteristics of Spartina alterno＇7ora and indigenous plant Phragmites australis in October, 2010. The results showed that： Spartina alterni^o#~ has a significantly higher net photosynthetic rate （Pn） in both mean and maximum values compared with the local plant Phragmites australis. It means that the ability of using light energy of Spartina altern（[tora is stronger than Phragmites australis, allowing the invasive plant accumulate more photosynthesis products. The study also showed that Spartina alterni/7ora had a better adaptability to salt environment due to a mechanism of effective salt resistance.

关 键 词：净光合速率 蒸腾速率 光合光响应 互花米草 芦苇 

分 类 号：X173[环境科学与工程—环境科学]