Ecosystem

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Organism

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A single living thing

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Population

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The number of organisms of the same species. "What is the population of penguins in the zoo?"

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Community

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All the organisms in an ecosystem. Such as "What are all of the living things in the marsh?"

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Habitat

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Conditions required for the survival of species

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Biome

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A collection of ecosystems that are similar or related in the dominant for of plant life. A large area with a characteristic climate.

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Biosphere

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All the biomes and all the ecosystems on Earth. Region on earth in which life exists.

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Consumer

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An organism that cannot make its own food and has to eat other organisms

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Producer

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An organism that can make its own food

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Abiotic

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Non-living factors in the environment such as wind, temperature

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Biotic

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Factors caused by living things such as bacteria

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Food chain

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A feeding pathway made up of several organisms.

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Food web

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Many food chains that inter-connected to each other

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Ecology

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The study of the interaction of living things with each other and with abiotic factors of the environment.

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Abiotic

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Factors in an ecosystem by non-living agents.

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Biotic

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A factor in an ecosystem created by the presence and rolls of other living things.

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Ecosystem

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In an area defined by ecologists the set of relationships between populations of species and between population of abiotic factors.

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Ecotones

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A transition area between two ecosystems that includes members of the community of both ecosystems

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Community

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A collection of all populations of all species in an ecozone. All organisms in an ecosystem.

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Niche

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Al ways in which an organism interacts with its biotic and abiotic environment

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Trophic level

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The way of categorizing living things according to how they gain energy First trophic level is autotrophs.

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Autrotroph

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an organism that uses energy and raw materials to make its own food, whether from photosynthesis or some other form of chemical synthesis a, a producer

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Hetrotroph

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An organism that is incapable of making its own food, and so must feed on another organisms to gain energy.

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Omnivore

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an animal that eats both plants and meat

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Predator

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an organism that attacks another organism for food

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Prey

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an organism that is the victim of another animal

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Decomposer

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An organism that feeds on detritus in the process releasing nutrients to soil and water where it can be used by other organisms

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Extinct

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A species that no longer exists

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Endangered

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is a species with a decreasing

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Extirpated

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One species that no longer exits in one part of a region but found in other regions.

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Threatened

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A species that is likely to become endangered if factors that make it vulnerable are not reversed

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Vulnerrable

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Any species that is at risk because of low or declining population at the fringe of its range

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Mutulism

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a relationship between two species of organisms in which both benefit from the association.

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Commensalism

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relationship between two organisms of different species in which one derives some benefit while the other is unaffected.

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Parasitism

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Relationship between two organisms where one benifits and another is killed

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Symbosis

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the living together of two dissimilar organisms, as in mutualism, commensalism, amensalism, or parasitism