Editing Algal bloom (section)

==== Upwelling of nutrients ====
Upwelling events happen when nutrients such as phosphates and nitrogen are moved from the nutrient dense hypolimnion to the nutrient poor metalimnion.<ref name=":3" /><ref name=":4" /> This happens as result of geological processes such as seasonal overturn when lake surfaces freeze or melt, prompting mixing due to changing water densities mixing up the composition of limnion layers and mixing nutrients around the system.<ref>{{Cite web |date=2024-08-09 |title=Harmful Algal Blooms |url=https://www.adkwatershed.org/harmful-algal-blooms |access-date=2024-12-09 |website=Adirondack Watershed Institute |language=en-US}}</ref> This overabundance in nutrients leads to blooms.<ref name=":4" />