Effects of ocean acidification on the physiological performance and carbon production of the Antarctic sea ice diatom Nitzschia sp ICE-H

Ocean acidification (OA) resulting from increasing atmospheric CO2 strongly influences marine ecosystems, particularly in the polar ocean due to greater CO2 solubility. Here, we grew the Antarctic sea ice diatom Nitzschia sp. ICE-H in a semicontinuous culture under low (similar to 400 ppm) and high...

Full description

Bibliographic Details
Published in:Marine Pollution Bulletin
Main Authors: Qu, Chang-Feng, Liu, Fang-Ming, Zheng, Zhou, Wang, Yi-Bin, Li, Xue-Gang, Yuan, Hua-Mao, Li, Ning, An, Mei-Ling, Wang, Xi-Xi, He, Ying-Ying, Li, Lu-Lu, Miao, Jin-Lai
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Ocean Acidification
Antarctic Sea Ice Microalgae
Nitzschia
Photosynthesis
Particulate Organic Carbon
Carbonic Anhydrase
Antarctic
The Antarctic
Antarc*
Ocean acidification
Sea ice
Online Access:http://ir.qdio.ac.cn/handle/337002/143106
https://doi.org/10.1016/j.marpolbul.2017.05.018
Description
Summary:Ocean acidification (OA) resulting from increasing atmospheric CO2 strongly influences marine ecosystems, particularly in the polar ocean due to greater CO2 solubility. Here, we grew the Antarctic sea ice diatom Nitzschia sp. ICE-H in a semicontinuous culture under low (similar to 400 ppm) and high (1000 ppm) CO2 levels. Elevated CO2 resulted in a stimulated physiological response including increased growth rates, chlorophyll a contents, and nitrogen and phosphorus uptake rates. Furthermore, high CO2 enhanced cellular particulate organic carbon production rates, indicating a greater shift from inorganic to organic carbon. However, the cultures grown in high CO2 conditions exhibited a decrease in both extracellular and intracellular carbonic anhydrase activity, suggesting that the carbon concentrating mechanisms of Nitzschia sp. ICE-H may be suppressed by elevated CO2. Our results revealed that OA would be beneficial to the survival of this sea ice diatom strain, with broad implications for global carbon cycles in the future ocean.

Similar Items