海洋科学2025，Vol.49Issue(12)：12-25,14.DOI:10.11759/hykx20251010001
模拟增温对黄河三角洲湿地芦苇光合特性的影响
Effects of simulated warming on photosynthetic characteristics of Phragmites australis in the Yellow River Delta wetland
摘要
Abstract
In this study,Phragmites australis,the dominant species in the coastal wetland of the Yellow River Delta,was used as the study object.An open-top chamber(OTC)was used to simulate warming,and a new-generation photosynthetic measuring instrument(LI-6800)was employed to systematically analyze the seasonal effects of elevated temperature on the photosynthetic physiological characteristics of P.australis.The results showed that the effects of warming on the photosynthetic physiology of P.australis exhibited obvious periodic changes.In the early growth stage(May and June),warming significantly increased the apparent quantum yield(AQY)and initial carboxylation efficiency(φ)by 25.0%and 71.4%,respectively,significantly enhanced the net photosynthetic rate(Pn),and increased the maximum net photosynthetic rate(Pnmax)by 21.3%.In the middle growth stage(July),warming significantly increased the maximum net photosynthetic rate by 77.3%,and water use efficiency(WUE)also increased significantly,indicating that P.australis exhibited adaptive adjustment to warming.In the late growth stage(August),the photosynthetic apparatus was under high-temperature stress,and light energy distribution became unbalanced.By September,warming delayed the functional decline to some extent(Pnmax increased by 4.5%),and photosynthetic limitation shifted to non-stomatal factors.This study revealed that the response of P.australis to warming is a dynamic process involving multi-parameter synergistic adaptation,and its long-term"blue carbon"function depends on the comprehensive balance between promotion and inhibition effects at different growth stages.关键词
全球变暖/瞬时气体交换/光响应曲线/CO2 响应曲线/蓝碳Key words
global warming/instantaneous gas exchange/light response curve/CO2 response curve/blue carbon分类
农业科技引用本文复制引用
张玉华,谢柳娟,叶思源,何磊,丁喜桂,苏大鹏,武雄..模拟增温对黄河三角洲湿地芦苇光合特性的影响[J].海洋科学,2025,49(12):12-25,14.基金项目
海洋负排放国际大科学计划(66.8 号行动),国家自然科学基金区域发展联合基金重点项目(U22A20558)、山东省自然科学基金(ZR2023MD060&ZR2022MD024)、中国地质调查局项目(DD20189503&DD20221775)Global Ocean Negative Carbon Emissions,Global-ONCE(Operation 66.8),National Natural Science Foundation of China Regional Development Joint Fund Key Project,No.U22A20558,Natural Science Foundation of Shandong Province(No.ZR2023MD060&ZR2022MD024),China Geological Survey Project,No.DD20189503&DD20221775 （66.8 号行动）
