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Vocabulary

TermDefinition
Apex Predator (Consumer) The predator at the top of the food chain who has no natural predator.
Aquatic ecosystem An ecosystem in and around a body of water.
Carnivores Obtain energy by eating other consumers.
Carrying Capacity The maximum population size that an ecosystem can support.
Cellular Respiration The process where cells break down food/sugars in the presence of oxygen to release energy.
Chemo-synthesis The process by which bacteria turn chemical energy into food producers.
Commercialism A symbiotic relationship between two organisms in which both organisms benefit.
Competition An interaction that occurs when organisms try to get the same resources.
Consumers Organisms in an ecosystem that cannot make their own food. Also called must obtain food from other sources.also called heterotrophs.
Cooperation A helpful interaction among organisms living in a limited area that aids each organism’s survival.
Decomposer Obtain energy by breaking down the remains of dead organisms or wastes of living organisms.
Denitrification The process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere by bacteria.
Density Dependent Limiting Factor A limiting factor that depends in some way on population size.These are usually biotic factors.
Density Independent Limiting Factor A limiting factor that in no way depends on population size.These are usually abiotic factors.
Energy Pyramid A diagram that shows the energy flows between organisms in an ecosystem.
Food Chain A series of organisms in which each feeds on the one at the next lower trophic level.
Food Web All of the food chains in an ecosystem and how they are interconnected.
Herbivores Obtain energy by eating plants.
Host An organism that a parasite lives in or on.
Limiting Factor Any biotic or abiotic factor restricts the population size or affects population growth.
Mutualism A close relationship between two species that benefits at least one of the species. There are three types of symbiosis-mutualism, commensalism, parasitism.
Nitrogen Fixation The process that converts nitrogen in the atmosphere into compounds in the soil that are useful to a variety of organisms.
Omnivores Obtain energy by eating both producers and other consumers.
Parasite An organism that lives in or on another organism and benefits at the other organism’s expense.
Parasitism A symbiotic relationship in which one organism benefits and the other is harmed.
Photosynthesis The process by which plants use the sun’s energy to make food chemosynthesis. The process where plants use the sun’s energy to convert carbon dioxide and water into sugars/food.
Producers organisms in an ecosystem that make their own food. Also called autotrophs.
Predation An interaction in an ecosystem where the predator kills and eats the prey.
Predator An organism that hunts, captures, and eats other organisms.
Prey An organism that is hunted and eaten.
Symbiosis All of the food chains in an ecosystem and how they are interconnected.
Terrestrial Ecosystem A land-based ecosystem.
Trophic Level An energy level in an ecosystem.
Created by: jerrythe3nd
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