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Ecology

Terms

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ecosystem
a working unit made up of organisms interacting with each other and with non-living factors
decomposers
organisms, such as bacteria or fungi, that feed on dead organisms and the waste material of other organisms
ecology
the study of all the interactions between living and non-living parts of an ecosystem
endangered species
a species with so few living members that it is in danger of becoming extinct
limiting factor
a factor that controls the size of a population EX: the availability of food or amount of rainfall
population
a group of the same type of organisms living in the same place at the same time
biotic factor
all the organisms that make up the living parts of an ecosystem, including trees, birds, bacteria, and frogs
biosphere
the part of Earth in which organisms can live; includes the topmost part of Earth's crust, the surrounding atmosphere, and all the rivers, lakes, and oceans
niche
the role, or job of and organism in an ecosystem
community
all the populations living in an area who depend on each other for food, shelter, and other assorted needs
habitat
the place in which an organism lives out its life and where resources such as food, water, space, and shelter are shared among different species
producer
an organism, such as a plant, that is able to use energy from the sun to make its own food
threatened species
a species that is in need of protection but is not immediate danger of extinction
consumer
an organisms that eats other organisms
abiotic factor
all the non-living parts of an ecosystem, including air, soil, water and temperature

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