曲阜师范大学学报（自然科学版）2026，Vol.52Issue(1)：1-9,9.DOI:10.3969/j.issn.1001-5337.202407.064
海水pH变化下大亚湾海域典型海藻对升温的生理响应
Physiological responses of macroalgae to temperature rise under conditions of pH increase and decrease in Daya Bay
摘要
Abstract
To investigate the physiological responses of macroalgae to warming under different pH con-ditions,the effects of temperature rise on the photosynthetic physiology of three typical macroalgae,namely the green alga Ulva lactuca,the red alga Gracilaria chilensis and the brown alga Sargasum graminifolium were comparatively studied in Daya Bay.The results showed that the maximum photosynthetic oxygen evolution rate(Pmax)of U.lactuca at normal pH and temperature is(248.6±40.3)μmol/(g·h),which was reduced by 48%and 35%by increasing and decreasing pH,respectively.The Pmax of S.graminifoli-um[(86.4±11.2)μmol/(g·h)]showed no significant change with pH variation,but that of G.chilensis[(78.9±5.74)μmol/(g·h)]increased with decreasing pH.Accordingly,an increase/decrease in pH both reduced the saturation light(EK)of U.lactuca,but had no significant effect on G.chilensis.The EK of S.graminifolium also decreased with decreasing pH.These results also showed that an increase in seawater temperature(3℃)would increase the photosynthetic capacity of the three macroalgae species.The promo-tion of daily carbon fixation of U.lactuca by an increase in temperature firstly increased and then decreased when pH decreased from 8.6 to 7.8,while it varied less in G.chilensis and gradually increased in S.gra-minifolium.These findings contribute to a deeper understanding of the physiological response and acclima-tion of macroalgae to temperature rise in Daya Bay under conditions of ocean acidification or alkalization.关键词
酸化和碱化/光合生理/日生产力/大型海藻/大亚湾Key words
acidification and alkalinity/photophysiology/daily primary production/macroalgae/Daya Bay分类
海洋科学引用本文复制引用
董杰,万明月,刘传灏,钟瑜,梁菲,王凯,李刚..海水pH变化下大亚湾海域典型海藻对升温的生理响应[J].曲阜师范大学学报（自然科学版）,2026,52(1):1-9,9.基金项目
科技部重点研发项目(2022-24) （2022-24）
国家自然科学基金(32371665). （32371665）
