Photosynthesis and chemosynthesis are both processes by which organisms produce food; photosynthesis is powered by sunlight while chemosynthesis runs on chemical energy. ... Ecosystems depend upon the ability of some organisms to convert inorganic compounds into food that other organisms can then exploit (or eat!).
Characteristics of the photic zone in the freshwater biome are the warmer water, light, rich in freshwater organisms, shallow.
The photic zone is the first zone from the top of the freshwater body of water. It is the shallowest part of the body of water, and it is further divided into the littoral zone and limnetic zone. This zone is the closest to the shore. The sunlight manages to penetrate in it, so it is a zone where the majority of the producers are able to survive and thrive because they can perform the process of photosynthesis. Since this zone enables the producers to thrive, and the producers are the basis of any ecosystem, it enables the further existence, high diversification, and thriving of all the other living organisms in the freshwater biome. The photic zone is also characterized with warmer water because it is on the top, it is heated by sunlight, so that provides nice conditions for the living organisms to be the most abundant in this zone.
Global warming is a slow increase in the overall temperature of the earth's atmosphere generally created by the greenhouse effect. This effect is caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
