| 摘要: |
| 海岛植被破坏严重，而适生物种少的问题已严重影响到海岛植被修复研究工作。本研究通过测定海坛岛和大屿共30种植物的夏季日间光合特性、水分利用效率和比叶面积，为海岛水土流失区生态修复过程中适生植物的筛选提供重要的理论依据。研究结果表明，在海坛岛和大屿的共有种中，仅台湾相思(Acacia confusa)和海桐(Pittosporum tobira)在不同样地的水分利用效率存在差异(p<0.05)；滨柃(Eurya emarginata)的原生种和栽培种的水分利用效率没有差异(p>0.05)，而海桐的水分利用效率则存在明显的差异(p<0.05)。不同植物的光合参数和比叶面积具有一定的差异，以适应不同的环境。根据水分利用效率进行聚类分析，将30种植物分成3类。其中，夹竹桃(Nerium oleander)、台湾相思、翠芦莉(Ruellia brittoniana)和滨旋花(Calystegia soldanella)等水分利用效率较高，表现出对海岛环境较强的适应能力。因此，将光合特性作为海岛适生物种筛选的指标具有借鉴意义。 |
| 关键词: 海洋生物学 光合特性 植被修复 适生植物 物种筛选 海岛 |
| DOI：10.3969/J.ISSN.2095-4972.2021.03.008 |
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| 基金项目:福建省科技计划资助项目(2017Y0062，2018Y3006，2015Y0036，2018Y0060)；自然资源部海洋公益性行业科研专项资助项目(201505009-5) |
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| Screening of adaptable plants for island vegetation restoration based on photosynthetic characteristics |
| ZHANG Linting,JIANG Degang,LIU Jianhui,WANG Ruixin |
| (Island Research Center, MNR, Pingtan 350400, China;Third Institute of Oceanography, MNR, Xiamen 361005, China) |
| Abstract: |
| The problem of suitable plant species sortage severely retarded the research in island vegetation restoration. In this study the photosynthetic characteristics were considered as key indicators to represent the adaptability of plants on island environment. We determined photosynthetic characteristics, water use efficiency (WUE) and specific leaf area of 30 adaptable species in Haitan Island and Dayu Island in summer daytime. We hoped to draw a conclusion for the theory of species selection for island restoration. The result showed that among the conventional species on Haitan Island and Dayu Island, WUEs of Acacia confusaand Pittosporum tobirawere significant different (p<0.05). WUEs of native and introduced P. tobirawere different significantly (p<0.05), but Eurya emarginata was the opposite. Photosynthetic parameters and specific leaf area of 30 species plants are different for their water use strategies against different habitat. Cluster analysis was performed with WUE and 3 categories were grouped from 30 species, accordingly. The WUEs of Nerium oleander, Acacia confusa, Ruellia brittoniana and Calystegia soldanella were high showing strong adaptabilities to the island environment. Therefore, it is significant to select the photosynthetic characteristics as key indicators for screening adaptable plants in island vegetation restoration. |
| Key words: marine biology photosynthetic characteristic vegetation restoration adaptable plant species selection island |
