摘要
以高原湿地滇池和纳帕海湖滨带为研究地点,湖滨带优势物种水葱为研究对象,测定水葱的形态、比叶重及光合等性状,分析其在不同海拔湿地采样点间的差异。结果表明:较高海拔的纳帕海地区的水葱植株个体较小,比叶重较小,并且具有较低的光合能力。滇池和纳帕海水葱的叶片长度分别为205.6、116.5 cm,基径分别为10.94、8.77 mm,比叶重分别为229.85、107.77 g/m^2,净光合速率分别为19.43、12.36μmol/(m^2·s),气孔导度分别为0.63、0.30 mol/(m^2·s),蒸腾速率分别为3.43、2.34 mmol/(m^2·s)。因此,水葱的形态大小和生产力状况在不同海拔生长地点表现不同,较高海拔地区较严峻的生长条件是致使植物个体较小,生产力下降的重要原因。研究结果为从功能性状角度探讨湿地植物如何适应环境变化提供了案例。
Taking the plateau wetland Dianchi Lake and the Napahai Lakeside zone as the research site,the lakeside with the dominant species of Scirpus Validus as the research object,and detected the morphological,specific leaf weight and the photosynthetic properties of the species to compare and analyzed the differences in these parameters under different altitudes.The results show that compared to Dianchi wetlands,S.Validus plants in Napahai wetlands are small in height,and have low specific leaf weight and photosynthetic capacity.In Dianchi and Napahai wetlands,the leaf length of S.Validus are 205.6 and 116.5 cm,the basal diameter are 10.94 and 8.77 mm,and the specific leaf weight are 229.85 and 107.77 g/m^2,respectively.The net photosynthetic rate of S.Validus in Dianchi and Napahai wetlands are 19.43 and 12.36μmol/(m^2·s),respectively.The stomatal conductance of the species in the 2 sites were 0.63 and 0.30 mol/(m^2·s),and the transpiration rates are 3.43 and 2.34 mmol/(m^2·s),respectively.These results indicates that the morphological size and the productivity of S.Validus have different appearance in growing sites with different altitudes.The harsh growing conditions at the higher altitudes should be important reasons for plants with small size and low productivity.Our study provides a case study on how wetland plants adapt to environmental changes from plant functional trait properties.
作者
冯春慧
何照棚
田昆
管东旭
刘振亚
孙梅
Feng Chunhui;He Zhaopeng;Tian Kun;Guan Dongxu;Liu Zhenya;Sun Mei(Wetlands College,Southwest Forestry University,Kunming Yunnan 650224,China;National Plateau Wetlands Research Center,Southwest Forestry University,Kunming Yunnan 650224,China;Yunnan Dianchi Lake Wetland Ecosystem National Observatory Station,Kunming Yunnan 650224,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2019年第1期166-171,共6页
Journal of Southwest Forestry University：Natural Sciences
基金
国家自然科学基金项目(31760115)资助
云南省高原湿地创新团队(2012HC007)资助
云南省科技计划项目(2017FD103)资助
西南林业大学科研启动基金项目(111706)资助
关键词
功能
适应性
水葱
高原湿地
湖滨带
海拔
function
adaptability
Scirpus validus
plateau wetland
lakeside zone
elevations
