The Xiamen Symposium on Marine Environmental Sciences (XMAS 2025)

235 / 2024-09-12 11:13:38

Effects of acidification on nitrification and associated nitrous oxide emission in estuarine and coastal waters

Estuary and Coast;,Acidification,Nitrogen

In the context of an increasing atmospheric carbon dioxide (CO₂) 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 (N₂O) in estuarine and coastal waters. This study may help predict the response and evolution of estuarine and coastal ecosystems under climate change and human activities.