| Wei Zhangliang,Mo Jiahao,Huang Ruiping,Hu Qunju,Long Chao,Ding Dewen,Yang Fangfang,Long Lijuan. 2020. Physiological performance of three calcifying green macroalgae Halimeda species in response to altered seawater temperatures. Acta Oceanologica Sinica, 39(2):89－100 |
| Physiological performance of three calcifying green macroalgae Halimeda species in response to altered seawater temperatures |
| 三种大型钙化绿藻仙掌藻对海水变化的生理响应 |
| Received:December 20, 2018 |
| DOI：10.1007/s13131-019-1471-3 |
| Key words:calcifying macroalgae climate change seawater temperature physiological performance photosynthesis calcification |
| 中文关键词: 大型钙化海藻 气候变化 海水温度 生理响应 光合作用 钙化作用 |
| 基金项目:The Guangzhou Science and Technology Project under contract No. 201707010174; the Strategic Priority Research Program of the Chinese Academy Sciences under contract No. XDA13020203; the Ocean Public Welfare Scientific Research Project under contract No. 201305018-3. |
| Author Name | Affiliation | E-mail | | Wei Zhangliang | CAS 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 | | | Mo Jiahao | CAS 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 | | | Huang Ruiping | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Hu Qunju | CAS 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 | | | Long Chao | CAS 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 | | | Ding Dewen | CAS 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, Ministry of Natural Resources, Qingdao 266061, China | | | Yang Fangfang | CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | ycuyang@163.com | | Long Lijuan | CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | longlj@scsio.ac.cn |
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| Abstract: |
| The effects of seawater temperature on the physiological performance of three Halimeda species were studied for a period of 28 d. Five treatments were established for Halimeda cylindracea, Halimeda opuntia and Halimeda lacunalis, in triplicate aquaria representing a factorial temperature with 24℃, 28℃, 32℃, 34℃ and 36℃, respectively. The average Fv/Fm of these species ranged from 0.732 to 0.756 between 24℃ and 32℃ but declined sharply between 34℃ (0.457±0.035) and 36℃ (0.122±0.014). Calcification was highest at 28℃, with net calcification rates (Gnet) of (20.082±2.482) mg/(g·d), (12.825±1.623) mg/(g·d) and (6.411±1.029) mg/(g·d) for H. cylindracea, H. opuntia and H. lacunalis, respectively. Between 24℃ and 32℃, the specific growth rate (SGR) of H. lacunalis (0.079%-0.110% d–1) was lower than that of H. cylindracea (0.652%-1.644% d–1) and H. opuntia (0.360%-1.527% d–1). Three Halimeda species gradually bleached at 36℃ during the study period. Malondialdehyde (MDA) and proline levels in tissues of the three Halimeda were higher in 34-36℃ than those in 24-32℃. The results indicate that seawater temperature with range of 24-32℃ could benefit the growth and calcification of these Halimeda species, however, extreme temperatures above 34℃ have negative impacts. The measured physiological parameters also revealed that H. cylindracea and H. opuntia displayed broader temperature tolerance than H. lacunalis. |
| 中文摘要: |
| 为探究三种大型钙化绿藻仙掌藻（Halimeda）对海水温度变化的生理响应，本次实验共计设定5个温度组，分别为24℃、28℃、32℃、34℃和36℃，每个温度组设 3个平行，将三种仙掌藻分别放入各梯度温度的培养缸中培养28天。结果表明：在24℃-32℃温度区间，三种仙掌藻的最大光量子产量（Fv/Fm）为维持在0.732-0.756；而在34℃-36℃温度区间，Fv/Fm值下降到0.122-0.457。在28℃时三种仙掌藻的钙化速率（Gnet）最快，圆柱状仙掌藻（Halimeda cylindracea）、仙掌藻（Halimeda opuntia）和Halimeda lacunalis的Gnet分别为（20.082±2.482） mg/（g·d）、（12.825±1.623） mg/（g·d） 和 （6.411±1.029） mg/（g·d）。在24℃-32℃温度区间，H. lacunalis的特定生长率（SGR）为0.079% d-1-0.110% d-1，显著低于圆柱状仙掌藻（0.652% d-1-1.644% d-1）和仙掌藻（0.652% d-1-1.644% d-1）；实验期间，三种仙掌藻在36℃培养条件下藻体逐渐白化。在34℃-36℃温度区间，三种仙掌藻组织中丙二醛（MDA）和脯氨酸（proline）含量始终高于24℃-32℃温度区间。通过分析可知，三种仙掌藻在水温24℃-32℃条件下生长速率、钙化速率和光合作用均显著高于34℃-36℃实验组，而当水温超过34℃时，对三种仙掌藻有显著负影响；此外，圆柱状仙掌藻和仙掌藻表现出更强的温度耐受性 |
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