Difficulties with water use associated with nutrient enriched waters have focused considered attention to those factors stimulating growths of algae. Algae are influenced by many and varied factors. Vitamins, trace metals, hormones and auxins, extracellular metabolites, autointoxicants, viruses, and predation and grazing by aquatic animals are factors that stimulate or reduce algal growths. It is the purpose of this bibliographic compilation to present some of the literature devoted to population influencing factors in the aquatic environment.