organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer.
process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches.
Process by which some orgaisms, such as certain bacteria, use chemical energy to produce carbohydrates.
organism that contains energy from the food it consumes; also called a consumer.
organisms that obtain energy by eating only plants.
organism that obtain energy by eating animals.
organism that obtain energy by eating both plants and animals.
organism that feeds on plant and animal remains and other dead matter.
organism that breaks down and obtain energy from dead organic matter.
series of steps in an ecosystem in which organisms transfer energy by eating and being eaten.
network of complex interactions fformed by the feeding relationships among the various organisms in an ecosystem.
step in a food chain or food web.
diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or food web.
total amount of living tissue within a given trophic level