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| 海洋酸化对经济海藻坛紫菜叶状体的光照强度和温度适应范围的影响 |
| 李梦雅,许凯,唐小虹,张立日,徐燕,王文磊,纪德华,陈昌生,谢潮添 |
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| (集美大学水产学院，福建 厦门 361021) |
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| 摘要: |
| 坛紫菜（Pyropia haitanensis）养殖区的温度和光照强度变化幅度较大，坛紫菜叶状体对温度和光胁迫的耐受能力决定了产量。为了探究海洋酸化是否改变坛紫菜对温度和光胁迫的耐受能力，本研究采用实验生态学方法研究了坛紫菜的光合作用和生长对温度和光照强度的响应特点。结果表明，无论在短期（4 h）或长期（3～6 d）的高温和强光胁迫下，海洋酸化均提高了坛紫菜的光合速率和生长速率。特别是6 d的高温（31 ℃）处理导致坛紫菜叶状体死亡，而海洋酸化使得坛紫菜依然能维持0.1 d-1的生长速率；在40~550 μmol/(m2·s)的光照强度范围内，酸化处理将叶状体生长速率提高27%以上。本研究表明海洋酸化提高坛紫菜对高温和强光的耐受能力，未来坛紫菜养殖产业可能受益于海洋酸化。 |
| 关键词: 海洋生物学 坛紫菜 海洋酸化 高温 强光 光合速率 生长 |
| DOI：10.3969/J.ISSN.2095-4972.2021.03.003 |
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| 基金项目:国家自然科学基金青年基金资助项目（41806183）；福建省科技计划区域发展示范资助项目（2017N3016）；福建省中青年教师教育科研资助项目（JT180273）；现代农业产业技术体系专项资金资助项目（CARS-50） |
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| Effects of ocean acidification on the light and temperature adaptations of commercial seaweed Pyropia haitanensis |
| LI Mengya,XU Kai,TANG Xiaohong,ZHANG Liri,XU Yan,WANG Wenlei,JI Dehua,CHEN Changsheng,XIE Chaotian |
| (Fisheries College of Jimei University, Xiamen 361021, China) |
| Abstract: |
| The temperature and light intensity vary greatly in Pyropia/Porphyra culture areas and the yield of Py. haitanensis is determined by the tolerant ability of high temperature and high light intensity. We studied the response of photosynthesis and growth of Py. haitanensis to different temperature and light intensity by laboratory culture in order to know whether ocean acidification (OA) change the temperature and light tolerance of Py. haitanensis. The results showed that both short-term (4 hours) and long-term (3-6 days) high temperature and high light intensity treatments increased the photosynthetic rate and growth rate of Py. haitanensis. Though 6 days of high temperature (31 ℃) treatment resulted in the death of thallus in particular, the OA treated thallus grew well with a growth rate of 0.1 d-1. In the light range of 40-550 mmol/(m2·s), the growth rates of OA treated thallus increased by more than 27%. Our results indicate that OA can improve the high temperature and light intensity tolerances of Py. haitanensis and the Py. haitanensis cultivation industry may benefit from OA in the future. |
| Key words: marine biology Pyropia haitanensis ocean acidification high temperature light intensity photosynthetic rate growth |