pH 对中肋骨条藻和菱形海线藻生长及 NH4-N 吸收的影响。
Effects of pH on the growth and NH-N uptake of Skeletonema costatum and Nitzschia closterium.
机构信息
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
出版信息
Mar Pollut Bull. 2017 Nov 30;124(2):946-952. doi: 10.1016/j.marpolbul.2017.01.048. Epub 2017 Feb 2.
Ocean acidification (OA) and eutrophication intensifies in coastal sea under anthropogenic impact. OA coupled with the NH-N source effect in coastal water is likely to affect the planktonic ecosystem. In this work, Skeletonema costatum and Nitzschia closterium were chosen as typical species of diatom in Chinese coastal ecosystems to test the potential effect of OA and NH-N. Results showed that the growth and NH-N uptake of S. costatum and N. closterium were significantly inhibited by pH decline. The maximum uptake rate is higher than the maximum growth rate, implying that NH-N was assimilated faster for S. costatum and N. closterium with decreasing pH. Therefore, the inhibition rate of the growth of the two diatoms by the coupling effect of OA and eutrophication (pH7.45) is higher that than in the coastal sea by the end of the 21st century (pH7.71).
人为影响下，海洋酸化（OA）和富营养化在沿海水域加剧。OA 与沿海水域中 NH-N 源效应的结合可能会影响浮游生态系统。在这项工作中，选择了典型的中国沿海生态系统中的硅藻物种骨条藻和菱形藻来测试 OA 和 NH-N 的潜在影响。结果表明，pH 值下降显著抑制了骨条藻和菱形藻的生长和 NH-N 吸收。最大吸收速率高于最大生长速率，这意味着随着 pH 值的降低，NH-N 被更快地同化。因此，与 21 世纪末沿海海域（pH7.71）相比，OA 和富营养化（pH7.45）耦合效应对两种硅藻生长的抑制率更高。
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