Humans have impacted lagoons, estuaries and deltas , but non-climate drivers have been the primary agents of change . In estuaries and lagoons, nutrient inputs have driven eutrophication, which has modified food-web structures  and caused more-intense and longer-lasting hypoxia, more-frequent occurrence of harmful algal blooms and enhanced emissions of nitrous oxide . In deltas, land-use changes and associated disruption of sediment dynamics and land subsidence have driven changes that have been exacerbated by relative SLR and episodic events, including river floods and oceanic storm surges . Increased coastal flooding, erosion and saltwater intrusions have led to degradation of ecosystems .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report