浮游植物
海洋环流
亚热带
海洋学
环境科学
生产力
初级生产力
海洋酸化
生态学
生物
生态系统
营养物
海水
地质学
宏观经济学
经济
作者
Rongbo Dai,Zuozhu Wen,Haizheng Hong,Thomas J. Browning,Xiaohua Hu,Ze Chen,Xin Liu,Minhan Dai,François M. M. Morel,Dalin Shi
标识
DOI:10.1073/pnas.2423680122
摘要
Ocean acidification caused by increasing anthropogenic CO 2 is expected to impact marine phytoplankton productivity, yet the extent and even direction of these changes are not well constrained. Here, we investigate the responses of phytoplankton community composition and productivity to acidification across the western North Pacific. Consistent reductions in primary production were observed under acidified conditions in the North Pacific Subtropical Gyre and the northern South China Sea, whereas no significant changes were found at the northern boundary of the subtropical gyre. While prokaryotic phytoplankton showed little or positive responses to high CO 2 , small (<20 µm) eukaryotic phytoplankton which are primarily limited by low ambient nitrogen drove the observed decrease in community primary production. Extrapolating these results to global tropical and subtropical oceans predicts a potential decrease of about 5 Pg C y −1 in primary production in low Chl- a oligotrophic regions, which are anticipated to experience both acidification and stratification in the future.
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