海洋酸化
硝化作用
生物地球化学循环
生态系统
环境科学
河口
一氧化二氮
生物地球化学
环境化学
背景(考古学)
二氧化碳
温室气体
气候变化
海洋学
生态学
化学
氮气
生物
地质学
古生物学
有机化学
作者
Jie Zhou,Lijun Hou,Lijun Hou,Zhirui An,Feiyang Chen,Bolin Liu,Li Wu,Lin Qi,Hong-Po Dong,Ping Han,Guoyu Yin,Xia Liang,Yi Yang,Xiaofei Li,Dengzhou Gao,Ye Li,Zhanfei Liu,Richard Bellerby,Min Liu
标识
DOI:10.1038/s41467-023-37104-9
摘要
Abstract In the context of an increasing atmospheric carbon dioxide (CO 2 ) level, acidification of estuarine and coastal waters is greatly exacerbated by land-derived nutrient inputs, coastal upwelling, and complex biogeochemical processes. A deeper understanding of how nitrifiers respond to intensifying acidification is thus crucial to predict the response of estuarine and coastal ecosystems and their contribution to global climate change. Here, we show that acidification can significantly decrease nitrification rate but stimulate generation of byproduct nitrous oxide (N 2 O) in estuarine and coastal waters. By varying CO 2 concentration and pH independently, an expected beneficial effect of elevated CO 2 on activity of nitrifiers (“CO 2 -fertilization” effect) is excluded under acidification. Metatranscriptome data further demonstrate that nitrifiers could significantly up-regulate gene expressions associated with intracellular pH homeostasis to cope with acidification stress. This study highlights the molecular underpinnings of acidification effects on nitrification and associated greenhouse gas N 2 O emission, and helps predict the response and evolution of estuarine and coastal ecosystems under climate change and human activities.
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