Increased nutrient retention and cyanobacterial blooms in a future coastal zone

• DOI: 10.1016/j.ecss.2024.108728
• Publication Date: 2024-03-25T17:05:47Z
• Authors: Iréne Wåhlström; Elin Almroth-Rosell; Moa Edman; Malin Olofsson; Kari Eilola; Vivi Fleming; Matthias Gröger; Lars Arneborg; H.E. Markus Meier
• Keywords: Oceanography, Hydrology and Water Resources; Oceanografi, hydrologi och vattenresurser

Climate change and coastal management directly affect the magnitude of nutrient loads functioning zones. In this novel approach, a coastal-zone-model was used to study future retention capacity nitrogen phosphorus changes in cyanobacterial blooms an archipelago eutrophied sea. By conducting projections under combined impact changing climate we demonstrate that i) filter efficiency increases compared present day regardless load projection, ii) cyanobacteria biomass increased 5-fold worst-case projection iii) resulting spread anoxia hypoxia. However, phytoplankton hypoxia/anoxia will remain stable if planned mitigation is successfully implemented. This highlights importance need understand more about complex interactions taking place systems.