Unit 8 Part 1 Flashcards Preview

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Flashcards in Unit 8 Part 1 Deck (20):
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Abiotic Factor.

Nonliving parts of an organisms environment; air currents, temperature, moisture, and soil.

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Biological Community.

A community made up of interacting populations in a certain area at a certain time.

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Biosphere.

Portion of Earth that supports life; extends from high in the atmosphere to the bottom of the oceans.

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Biotic Factor.

All the living organism that inhabit an environment.

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Commensalism.

Symbiotic relationships in which one species benefits and the other species is neither harmed nor benefited.

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Ecology.

Scientific study of interactions between organisms and their environments.

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Ecosystem.

Interactions among populations in a community; the community's physical surroundings, or abiotic factors.

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Habitat.

A place where an organism lives out its life.

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Mutualism.

Symbiotic relationship in which both species benefit.

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Niche.

Role or position a species ha in it's environment; includes all biotic and abiotic interactions as an animal meets its needs for survival and reproduction.

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Parasitism.

Symbiotic relationship in which one organism benefits at the expense of another, usually another species.

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Population.

Group of all organism all if the same species, which interbred and live in the same place at the same time.

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Symbiosis.

Permanent, close association between two or more organisms of different species.

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Autotrophs.

Organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients.

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Biomass.

The total mass or weight of all living matter in a given area.

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Decomposer.

Organisms such as a fungi or bacteria, that break down and absorb nutrients from dead organisms.

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Food Chain.

Simple model that shows how matter and energy move through an ecosystem.

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Food Web.

Model that shows all the possible feeding relationships at each trophic level in a community.

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Heterotroph.

Organisms that cannot make their own food and must feed on other organisms for energy and nutrients.

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Trophic Level.

Organisms that represents a feeding step in the movement of energy and materials through an ecosystem.