Editing Algal bloom (section)

==== Nutrient uptake and cyanobacteria ====
A cause for algal blooms in nutrient-lacking environments come in the form of nutrient uptake. Cyanobacteria have evolved to have better nutrient uptake in oligotrophic waters.<ref name=":3">{{Cite journal |last1=Cottingham |first1=Kathryn L. |last2=Ewing |first2=Holly A. |last3=Greer |first3=Meredith L. |last4=Carey |first4=Cayelan C. |last5=Weathers |first5=Kathleen C. |date=2015 |title=Cyanobacteria as biological drivers of lake nitrogen and phosphorus cycling |url=https://esajournals.onlinelibrary.wiley.com/doi/10.1890/ES14-00174.1 |journal=Ecosphere |language=en |volume=6 |issue=1 |pages=art1 |doi=10.1890/ES14-00174.1 |issn=2150-8925|hdl=10919/89390 |hdl-access=free }}</ref> Cyanobacteria utilize nitrogen and phosphates in their biological processes. Because of this, cyanobacteria are known to be important in the nitrogen and phosphate fixing cycle in oligotrophic waters.<ref name=":3" /> Cyanobacteria can fix nitrogen by accessing atmospheric nitrogen ({{chem2|N2}}) that has been dissolved into water and transforming it into nitrogen accessible to other organisms.<ref name=":3" /> This higher amount of nitrogen is then able to sustain large algae blooms in oligotrophic waters.<ref name=":4">{{Cite journal |last1=Reinl |first1=Kaitlin L. |last2=Brookes |first2=Justin D. |last3=Carey |first3=Cayelan C. |last4=Harris |first4=Ted D. |last5=Ibelings |first5=Bas W. |last6=Morales-Williams |first6=Ana M. |last7=De Senerpont Domis |first7=Lisette N. |last8=Atkins |first8=Karen S. |last9=Isles |first9=Peter D. F. |last10=Mesman |first10=Jorrit P. |last11=North |first11=Rebecca L. |last12=Rudstam |first12=Lars G. |last13=Stelzer |first13=Julio A. A. |last14=Venkiteswaran |first14=Jason J. |last15=Yokota |first15=Kiyoko |date=2021 |title=Cyanobacterial blooms in oligotrophic lakes: Shifting the high-nutrient paradigm |url=https://onlinelibrary.wiley.com/doi/full/10.1111/fwb.13791 |journal=Freshwater Biology |language=en |volume=66 |issue=9 |pages=1846–1859 |doi=10.1111/fwb.13791 |issn=1365-2427}}</ref>

Cyanobacteria are able to retain high phosphorus uptake in the absence of nutrients which help their success in oligotrophic environments. Cyanobacteria species such as ''D. lemmermannii'' are able to move between the hypolimnion which is rich in nutrients such as phosphates and the nutrient-poor metalimnion which lacks phosphates.<ref name=":4" /> This causes phosphates to be brought up to the metalimnion and give organisms an abundance of phosphates, exacerbating the likelihood for algal blooms.<ref name=":3" />