Ecology

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Ecology

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The study of the interactions that take place among organisms and their environment

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Biosphere

The part of Earth that supports life

Top portion of Earth's crust

All the waters that cover Earth's surface

Atmosphere that surrounds Earth.

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Ecosystem

All the organisms living in an area and the nonliving features of their environment

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Population

All the organisms in an ecosystem that belong to the same species

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Community

All the populations in an ecosystem

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Habitat

The place in which an organism lives

provides the kinds of food and shelter, the temperature, and the amount of moisture the organism needs to survive

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Competition

Food

Space

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Competition

Competition caused by population growth affects many organisms, including humans

Limits population size

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Limiting Factor

Anything that restricts the number of individuals in a population.

Includes living and nonliving features of the ecosystem

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Succession

Natural, gradual changes in the types of species that live in an area; can be primary or secondary.

Primary – begins in a place without soil

Secondary – where soil already exists

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