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All the individuals of a species that occupy a particular geographic area at a certain time.
Accelerating growth that produces a J-shaped curve when the population is graphed against time.
A factor that limits the growth, distribution or amount of a population in an ecosystem.
Example: Resources available
The size of a population that an be supported indefinitely by the available resources and services of an ecosystem.
The way in which an organism occupies a position in an ecosystem, including all necessary biotic and abiotic factors.
An organism that kills and consumes other organisms.
Example: Wolf, Bear, Tiger, Hawk, Shark
An organism that is eaten as food by a predator.
Example: Rabbit, Tuna, Squirrel, Blue Jay
A symbiotic relationship between two species in which both species benefit from the relationship.
Example: Sharks and Pilot Fish
An organism whose niche is dependent on a close association with a larger host organism.
Example: Tape worm, Fungi
When two or more organisms compete for the same resource in the same location at the same time.
Example: Tigers and Lions, Killer Whales and Great White Sharks
Use that does not lead to long-term depletion of a resource or affect the diversity of the ecosystem from which the resource is obtained.
The period of time that is required for a population to double in size.
A measure of the impact of an individual or a population on the environment in terms of energy consumption, land use, and waste production.
A pattern of activity that leads to a decline in the function of an ecosystem.
Use of Earth's resources, including land and water, at levels that can continue forever.
The benefits experienced by organisms, including humans, that are provided by sustainable ecosystems.
The change of non-desert lands into desert, which may result from climate change or from unsustainable farming or water use.
Example: Parts of Africa turning into desert millions of years ago.
A form of tourist that is sensitive to the health of an ecosystem involves recreational activities provided by sustainable ecosystems.