|Definition :||singular: alga; plant or plant-like organisms that live in water and contain chlorophyl (used to convert sunlight to food)|
Algae, in the presence of fertilizers like nitrogen, can bloom. Algae blooms will use all of the available oxygen during this growth spurt--this causes all other plants and animals to die off.|
The Dead Zone in the Gulf of Mexico is an area that cannot support plant or animal life. Scientists believe that algae blooms may cause the Dead Zone.