The phosphate enters the ecosystem and becomes tied up in the biogeochemical system where it is recycled. The rapid growth of aquatic vegetation or increases in the algal population can cause the death and decay of vegetation and aquatic life because of the decrease in the dissolved oxygen levels
The sugar molecules thus formed contain carbon,hydrogen, and oxygen: their hydrocarbon backbones are used to make amino acids and to make other carbon based molecules that can be assembled into other large molecules.
