Answer Choices: Nutrient enrichment Cyanobacteria A compound found in some commercial detergents Can cause liver cancer Nutrient poor, low productivity Hypoxic zones caused by nutrients washed in from land Major source of nitrogen Toxic estuarine dinoflagellate Potent neurotoxin Oxygen depletion Match the best pairs, one best pair for each Eutrophication harmful algal blooms Oligotrophic fish kills Pfiesteria marine dead zones phosphate microcystin cropland saxitoxin.