Ocean acidification stimulation of phytoplankton growth depends on the extent of departure from the optimal growth temperature

文献类型： 外文期刊

第一作者： Xu, Dong

作者： Xu, Dong;Zhang, Xiansheng;Wang, Wei;Zhang, Xiaowen;Fan, Xiao;Wang, Yitao;Sun, Ke;Ye, Naihao;Xu, Dong;Ye, Naihao;Tong, Shanying;Wang, Bingkun

作者机构：

关键词： Ocean acidification; Phaeodactylum tricornutum; Phytoplankton; Temperature; Growth

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：7.001； 五年影响因子：7.301 ）

ISSN： 0025-326X

年卷期： 2022 年 177 卷

页码：

收录情况： SCI

摘要： Ocean acidification and warming are two major environmental stressors; however, the generality of how warming will alter growth responses of phytoplankton to ocean acidification is less known. Here, enhancement of growth by high CO2 (HC) in Phaeodactylum tricornutum and Thalassiosira weissflogii was most prominent at op-timum temperature. The extent to which growth rates in HC cultures were raised compared to low CO2 (LC) cultures tended to decrease with increasing or decreasing temperature, compared to the optimum. Further mechanistic studies in P. tricornutum revealed that cellular carbon and nitrogen content, superoxide dismutase activity, and respiration were generally higher in HC than those in LC at high and low temperatures, whereas PSII photochemical parameters were generally lower in HC than in LC at high and low temperatures. These results indicate that HC-grown cells needed to invest more energy and materials to maintain intracellular homeostasis and repair damage induced by the unsuitable temperatures.

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