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Population
A group of organisms of one species that lives in the same place at the same time.
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Exponential growth
Accelerating growth that produces a j shaped curve when the population is graphed against time.
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Limiting factors
A factor that limits the growth, distribution or amount of a population in an ecosystem.
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Carrying capacity
The size of the population that can be supported indefinitely by the available resources and services of an ecosystem.
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Ecological niche
The way that an organism occupies a position in an ecosystem, including all the necessary biotic and abiotic factors.
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Predator
An organism that kills and consumes other organisms.
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Prey
An organism eaten as food by a predator.
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Mutualism
A symbiotic relationship between two species in which both species benefit from therelationship.
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Parasite
An organism whose niche is dependent on a close association with a larger host organism.
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Competition
When two or more organisms compete for the same resource in the same location at the same time.
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Sustainable use
Use that does not lead to long-term depletion of a resource or affects the diversity of the ecosystem from which the resource was obtained.
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Doubling time
The time that is required for a population to double in size.
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Ecological footprint
A measure of the impact of an individual or a population on the environment in terms of energy consumption, land use, and waste production is called an ecological footprint.
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Unsustainable
When a pattern of activity leads to a decline in the function of an ecosystem.
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Sustainability
Use of Earth's resources , including land and water, at levels can that can continue forever.
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Ecosystem services
The benefits experienced by organisms, including humans that are provided by sustainable ecosystems.
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Desertification
desertification is a change in non desert land into desert; desertification may result from climate change and unsustainable farming or water use.
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Ecotourism
A form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable ecosystems
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