温度变化对典型海洋定鞭藻有机质C∶N∶P的影响  

The Effect of Temperature on C∶N∶P Stoichiometry of Particulate Organic Matters in Typical Marine Haptophytes

作　　者：崔家璇 秦肖 涂佳敏 曹中 张传莉 丁杨 毕蓉[1,2] Cui Jiaxuan;Qin Xiao;Tu Jiamin;Cao Zhong;Zhang Chuanli;Ding Yang;Bi Rong(Frontiers Science Center for Deep Ocean Multispheres and Earth System,Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao 266100,China;Laboratory for Marine Ecology and Environmental Science,Qingdao Marine Science and Technology Center,Qingdao 266237,China;School of Oceanography,Shanghai Jiaotong University,Shanghai 200240,China;Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510630,China)

机构地区：[1]中国海洋大学深海圈层与地球系统前沿科学中心海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]青岛海洋科技中心海洋生态与环境科学功能实验室,山东青岛266237 [3]上海交通大学海洋学院,上海200240 [4]中国科学院大学广州地球化学研究所,广东广州510630

出　　处：《中国海洋大学学报(自然科学版)》2025年第3期45-54,共10页Periodical of Ocean University of China

基　　金：崂山实验室科技创新项目(LSKJ202204005)资助。

摘　　要：本文系统研究了温度变化(12、18和24℃)对两种典型定鞭藻(大洋桥石藻Gephyrocapsa oceanica、球等鞭金藻Isochrysis galbana)胞内颗粒有机质C∶N∶P(POC、PON、POP)含量与比值的影响。结果表明,尽管升温对两种定鞭藻POC、PON、POP含量与比值无显著影响,但其对两种微藻的影响具有一定的规律。升温总体导致两种微藻胞内POC、PON、POP含量下降(4%~25%),其中大洋桥石藻胞内POC和PON含量较高、球等鞭金藻胞内POP含量较高。升温总体导致两种微藻POC∶PON下降(~14%)、PON∶POP升高(~20%)、POC∶POP几乎无变化。本研究量化了温度变化对海洋典型定鞭藻胞内POC、PON、POP含量与比值的影响,为深入理解全球气候变化背景下定鞭藻对海洋碳循环的反馈效应具有重要意义。As sea surface temperature continues to rise,the growth and chemical composition of marine phytoplankton change clearly.Haptophytes is a key phytoplankton group in marine ecosystems.Typical species of haptophytes can photosynthesize and calcify simultaneously,driving marine carbon cycle.To date,most studies have focused on physiological changes of Emiliania huxleyi,while simultaneous studies on C∶N∶P stoichiometry of particulate organic matters(POC,PON,and POP)in various haptophytes are still scarce.In this study,the effect of temperature(12,18 and 24℃)on the per-contents and molar ratios of POC,PON and POP in typical haptophytes(Gephyrocapsa oceanica and Isochrysis galbana)were tested.Overall,although warming had no significant effect on per-contents and molar ratios of POC,PON and POP in both species,its effect on the two species showed certain patterns.Specifically,warming reduced per-cell contents of POC,PON and POP(4%~25%)in both species.Per-cell contents of POC and PON were higher in G.oceanica,while per-cell contents of POP were higher in I.galbana.Warming resulted in a decrease in POC∶PON(~14%),an increase in PON∶POP(~20%),and no clear changes in POC∶POP in both species.This study quantifies the effect of temperature on per-contents and molar ratios of POC,PON and POP in typical haptophytes,which is of great significance for a better understanding of the feedback of haptophytes on marine carbon cycle in the context of global climate change.

关 键 词：全球变暖 颗石藻 球等鞭金藻 颗粒有机碳 颗粒有机氮 颗粒有机磷 

分 类 号：P734[天文地球—海洋化学]