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Effects of temperature and nitrogen sources on physiological performance of the coccolithophore Emiliania huxleyi

文献类型： 外文期刊

作者： Wang, Zihao 1 ; Tong, Shanying 3 ; Xu, Dong 4 ; Huang, Xintong 4 ; Sun, Yanmin 4 ; Wang, Bingkun 4 ; Sun, Haoming 4 ; Zhang, Xiaowen 4 ; Fan, Xiao 4 ; Wang, Wei 4 ; Sun, Ke 4 ; Wang, Yitao 4 ; Zhang, Pengyan 4 ; Gu, Zhifeng 1 ; Ye, Naihao 4 ;

作者机构： 1.Hainan Univ, Coll Marine Biol & Fisheries, Haikou 570228, Hainan, Peoples R China

2.Hainan Univ, Sanya Nanfan Res Inst, Sanya 572000, Hainan, Peoples R China

3.Ludong Univ, Coll Life Sci, Yantai, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Shandong, Peoples R China

5.Laoshan Lab, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Shandong, Peoples R China

关键词： Global warming; Emiliania huxleyi; Nitrogen sources; Elevated temperature; Photosynthesis

期刊名称：MARINE ENVIRONMENTAL RESEARCH （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0141-1136

年卷期： 2024 年 196 卷

页码：

收录情况： SCI

摘要： Both temperature and nutrient levels are rising in worldwide ocean ecosystems, and they strongly influence biological responses of phytoplankton. However, few studies have addressed the interactive effects of temperature and nitrogen sources on physiological performance of the coccolithophore Emiliania huxleyi. In this study, we evaluated algal growth, photosynthesis and respiration, elemental composition, enzyme activity, and calcification under a matrix of two temperatures gradients (ambient temperature 20 degree celsius and high temperature 24 degree celsius) and two nitrogen sources (nitrate (NO3 ) and ammonium (NH4+)). When the algae was cultured with NO3 medium, high temperature reduced algal photosynthesis and nitrate reductase activity, but it did not change other indicators significantly relative to ambient temperature. In addition, E. huxleyi preferred NO3 as the growth medium, whereas NH4+ had negative effects on physiological parameters. In the NH4+ medium, the growth rate, photosynthesis and photosynthetic rate, nitrate reductase activity, and particulate organic carbon and particulate organic nitrogen production rate of the algae decreased as temperature increased. Conversely, high temperature increased cellular particulate organic carbon, cellular particulate organic nitrogen, and particulate inorganic carbon levels. In summary, our findings indicate that the distribution and abundance of microalgae could be greatly affected under warming ocean temperature and different nutrient conditions.

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