生态学报2018，Vol.38Issue(4)：1256-1263,8.DOI:10.5846/stxb201612152597
基于功能性状评价5种植物对热带珊瑚岛环境的适应性
Using functional traits to evaluate the adaptability of five plant species on tropical coral islands
摘要
Abstract
Functional traits are direct measures of plant responses and adaptations to environmental changes.In this study,we quantified the photosynthetic and hydraulic traits of five plant species (Scaevola taccada,Ipomoea pescaprae,Casuarina equisetifolia,Arachis hypogaea,and Cocos nucifera),which were either grown in a nursery in Wenchang,Hainan Province,China,or transplanted to a coral island that has harsh habitats,such as high solar radiation and low fresh water availability.The maximum photosynthetic rate (Amax) of S.taccada,I.pescaprae,and C.equisetifolia growing on the coral island increased significantly compared to the plants growing in Wenchang nursery.Except for C.nucifera,the other four species on the island had lower specific leaf areas (SLA) and higher long-term water use efficiencies.The leaf carbon content (LC) of the five species on the coral island all decreased.In addition,the leaf hydraulic conductivity (Kleaf) of I.pescaprae,C.equisetifolia,and C.nucifera increased and the leaf turgor loss point (Ψtlp) for I.pescaprae,and A.hypogaea decreased significantly.However,the stomatal conductance (gs) of I.pescaprae and C.equisetifolia significantly increased.Our results demonstrated that S.taccada,A.hypogaea,and C.nucifera adapted to the island environment through non-stomatal regulation,(i.e.,an increase in Kleaf,but a decrease in Ψtlp and SLA).In contrast,I.pescaprae and C.equisetifolia employed both stomatal regulation (i.e.,an decrease in gs) and non-stomatal regulation (an increase in Kleaf,but a decrease in Ψtlp,and SLA) to promote plant carbon assimilation.In conclusion,S.taccada,I.pescaprae,and C.equisetifolia had higher photosynthetic rates and water use efficiencies,which enabled them to cope better with the harsh environmental conditions.Therefore,they are recommended as suitable species for vegetation restoration on tropical coral islands.关键词
热带珊瑚岛/生态适应性/植被新建/光合作用/功能性状Key words
tropical coral island/ecological adaptability/vegetation restoration/photosynthesis/functional traits引用本文复制引用
罗琦,叶清,刘慧,吴桂林,贺鹏程,华雷,朱丽薇,张辉,刘楠,简曙光..基于功能性状评价5种植物对热带珊瑚岛环境的适应性[J].生态学报,2018,38(4):1256-1263,8.基金项目
中国科学院A类战略性先导科技专项(XDA13020500) （XDA13020500）
国家重点研发计划项目(2016YFC1403002) （2016YFC1403002）
