Fujian Province University Key Laboratory of Pollution Monitoring and Control, Minnan Normal University, Zhangzhou 36300, China.
Fujian Province University Key Laboratory of Pollution Monitoring and Control, Minnan Normal University, Zhangzhou 36300, China; Fujian Province Key of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, China.
Mar Pollut Bull. 2022 Dec;185(Pt A):114327. doi: 10.1016/j.marpolbul.2022.114327. Epub 2022 Nov 7.
The presence of zinc (Zn), a vital element for algal physiological functions, coupled with the silicification of diatoms implies that it plays an integral role in the carbon and silicon cycles of the sea. In this study, we examined the effects of different pCO and Zn levels on growth rate, elemental compositions and silicification by Thalassiosira weissflogii. The results showed that under normal pCO (400 μatm), cultures of T. weissflogii were depressed for growth rate and silica incorporation rate, but encouraged for cellular silicon content, Si/C, Si/N, and sinking rate when Zn deficient (0.3 pmol L). However, cellular silicon and sinking rate of Zn-deficient and Zn-replete (25 pmol L) T. weissflogii were decreased and increased at higher pCO (800 μatm), respectively. Thus, acidification may affect diatoms significantly differently depending on the Zn levels of the ocean and then alter the biochemical cycling of carbon and silica.
锌（Zn）的存在对于藻类的生理功能至关重要，加上硅藻的硅化作用，表明它在海洋的碳和硅循环中起着不可或缺的作用。在这项研究中，我们研究了不同 pCO 和 Zn 水平对塔玛亚历山大藻生长速率、元素组成和硅化作用的影响。结果表明，在正常 pCO（400 μatm）下，塔玛亚历山大藻的生长速率和硅吸收速率受到抑制，但在 Zn 缺乏（0.3 pmol L）时，细胞内硅含量、Si/C、Si/N 和沉降率增加。然而，在较高的 pCO（800 μatm）下，Zn 缺乏和 Zn 充足（25 pmol L）的塔玛亚历山大藻的细胞内硅和沉降率分别降低和增加。因此，酸化可能会根据海洋的 Zn 水平对硅藻产生显著不同的影响，从而改变碳和硅的生物地球化学循环。
