| 不同光照强度下仙掌藻(Halimeda opuntia)对海洋酸化的生理响应 |
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| 引用本文： | 韦章良,莫嘉豪,胡群菊,严锐飞,龙超,丁德文,杨芳芳,龙丽娟.不同光照强度下仙掌藻(Halimeda opuntia)对海洋酸化的生理响应[J].海洋通报,2019,38(5):574-584. |
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| 作者姓名： | 韦章良 莫嘉豪 胡群菊 严锐飞 龙超 丁德文 杨芳芳 龙丽娟 |
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| 作者单位： | 中国科学院南海海洋研究所中国科学院热带海洋生物资源与生态重点实验室,广东广州 10301;中国科学院大学,北京100049;中国科学院海南热带海洋生物实验站,海南三亚572000;深圳大学生命与海洋科学学院,广东深圳,518061;中国科学院南海海洋研究所中国科学院热带海洋生物资源与生态重点实验室,广东广州 10301;自然资源部第一海洋研究所,山东青岛266061;中国科学院南海海洋研究所中国科学院热带海洋生物资源与生态重点实验室,广东广州 10301 |
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| 基金项目： | 广州市科技计划项目（201707010174）；中国科学院战略性先导科技专项（A 类） （XDA13020203）；国家自然科学基金（41806145） |
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| 摘 要： | 为探讨海洋酸化和光照强度变化对海洋钙化生物的影响,本文选用广泛分布在热带珊瑚礁区的大型钙化海藻仙掌藻(Halimeda opuntia)为研究对象,在室内通过CO2加富(pH=7.50、7.80和8.10)和调控光照强度(30和180μmol photons m2·s-1)的方式,探究其生长、钙化作用和光合作用等生理特征对海洋酸化和光照强度变化的响应。结果表明:海水酸化可以显著抑制仙掌藻的生长率、钙化速率和光合效率,且随酸化程度的加深而加强。酸化条件下(p H 7.50～7.80),生长率、钙化速率和Fv/Fm分别下降了48.29%～58.80%、51.78%～62.29%和2.37%～13.79%;光照强度的增加可以缓解这一抑制作用,高光照下生长率、钙化速率和Fv/Fm分别升高了2.01%～44.55%、29.61%～40.68%和1.68%～6.92%。酸化处理和光照强度变化对色素含量、丙二醛(MDA)和脯氨酸含量影响显著(P 0.01);酸化处理组中的Chl-a含量下降了32.69%～43.44%;而实验第20-28天,低光条件下的类胡萝卜素含量比高光照组高出12.12%～57.45%;酸化胁迫下,MDA在组织中逐渐积累;同时脯氨酸明显升高,以增加藻体自身的抗逆性,缓解胁迫带来的损伤。此外,组织中总碳(TC)和总氮(TN)含量在酸化条件下显著增加(P 0.05),光照强度的增加也一定程度上有利于提高TC和TN含量。通过分析可知,海洋酸化对仙掌藻的威胁是多方面的,对其生长、钙化作用和光合作用等生理过程的抑制作用随着酸化程度的加深而增加,而光照强度的增加一定程度上可以缓解酸化带来的负面效应。这些结果可以为预测未来海洋酸化对钙质生物的影响和珊瑚礁生物的多样性保护提供理论参考。
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| 关 键 词： | 仙掌藻 海水酸化 光照变化 光合作用 钙化作用 生理特征 |
| 收稿时间： | 2019/1/17 0:00:00 |
| 修稿时间： | 2019/2/8 0:00:00 |
The physiological performance of the calcifying green macroalga Halimeda opuntia in response to ocean acidification with irradiance variability |
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| WEI Zhang-liang,MO Jia-hao,HU Qun-ju,YAN Rui-fei,LONG Chao,DING De-wen,YANG Fang-fang and LONG Li-juan.The physiological performance of the calcifying green macroalga Halimeda opuntia in response to ocean acidification with irradiance variability[J].Marine Science Bulletin,2019,38(5):574-584. |
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| Authors: | WEI Zhang-liang MO Jia-hao HU Qun-ju YAN Rui-fei LONG Chao DING De-wen YANG Fang-fang and LONG Li-juan |
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| Institution: | Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China; University of Chinese Academy of Sciences, Beijing 100049, China; Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China,Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China; University of Chinese Academy of Sciences, Beijing 100049, China; Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China,Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China; University of Chinese Academy of Sciences, Beijing 100049, China; Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China,College of LifeSciences and Oceanography, Shenzhen University, Shenzhen 518061, Chinaina,Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China; University of Chinese Academy of Sciences, Beijing 100049, China; Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China,Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China; First Institute of Oceanography, Ministryof Natural Resources, Qingdao 266061, China,Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China and Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou 510301, China |
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| Abstract: | |
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| Keywords: | Halimeda ocean acidification irradiance variability photosynthesis calcification physiological performance |
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