Systems and methods for regulating algal biomass

A method for modifying the diversity of algal species in a body of water comprising more than 105 algal cells per ml, said method comprising (i) providing a hydrocarbon production installation or a part thereof;

• (ii) transporting a stream of water comprising a macronutrient or a micronutrient from a distance or a different water depth relative to the body of water by the hydrocarbon production installation;
• and (iii) discharging the stream of water into the body of water, wherein the concentration of the macronutrient or the micronutrient in the stream of water and in the body of water is different.

A method for increasing the algal productivity of a body of oligotrophic water, said method comprising (i) providing a hydrocarbon production installation or a part thereof;

• (ii) transporting a stream of fluid comprising a macronutrient or a micronutrient from a distance or a different water depth relative to the body of oligotrophic water by the hydrocarbon production installation, and (iii) discharging the stream of fluid into the body of oligotrophic water, wherein the concentration of the macronutrient or the micronutrient in the stream of fluid and in the body of oligotrophic water is different.

A system comprising a hydrocarbon production installation or a part thereof;

• a body of eutrophic water containing algae proximate to the hydrocarbon production installation;
• and a plurality of organisms that feed on the algae in the body of eutrophic water.

A hydrocarbon production installation-based system for regulating algal biomass in a body of water, said system comprising a nutrient management module, an algae module, and an aquaculture module, wherein said modules are operably associated with a hydrocarbon production installation.