Nutrient water pollution causes an overgrowth of algae and microscopic plants, while toxic pollutants in water can put plants under stress or even kill them. Whether the pollution has a positive or negative effect on pla... More »

Water pollution occurs when water is contaminated with chemicals and foreign substances that are harmful to humans, plants and animals. Water pollutants include chemical contamination from waste sites, chemical wastes fr... More »

The effects of air pollution include acidification, eutrophication, ground-level ozone and particulate matter. Acidification occurs during a chemical reaction with air pollutants that causes acid rain, and it affects the... More »

River pollution comes from a variety of different sources, including agricultural operations, industrial discharge, wastewater treatment plants and storm water runoff, that carry pollutants into waterways. Sources are cl... More »

In oxygenic photosynthesis, cyanobacteria and the chloroplasts of plants and algae turn carbon dioxide, water and photons into carbohydrates and free oxygen. Only some of this oxygen is used by the organism; the rest is ... More »

Most corals feed on phytoplankton, which are plants and algae that flow through the water. Invertebrate larvae, decomposing organic matter and floating plankton are also common food sources. Bacteria from dead plant matt... More »

Common carp eat insects, aquatic worms, earthworms, snails, crayfish, rotifers, mussels, water plants, algae, dead plant parts and fish eggs. They skim the bottoms of bodies of water, sucking in food and mud then spittin... More »