Ocean acidification

Ocean acidification in Te Moanaui Oceania, driven by climate change, poses significant threats to marine ecosystems and human wellbeing, and is key climate change impact for the region. Increasing atmospheric carbon dioxide (CO2) levels lead to higher CO2 absorption by oceans, which lowers seawater pH and carbonate ion concentration. This acidification hampers the ability of marine organisms, such as corals and shellfish, to build and maintain their calcium carbonate structures. This means that coral reefs are at risk of bleaching and degradation. This greatly impacts food security and livelihoods, and potentially worsens coastal inundation, storm surge damage, and salt water intrusion into aquifers across the region.The following nature-based solutions may be useful when taking into account ocean acidification.