12/17 5 Little ?'s Evn Sci

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What is primary succession?

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The ecological process that occurs when new land is created or exposed for the first time, and organisms must start from scratch to colonize it.

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What are pioneer species?

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The first organisms to inhabit a new or disturbed environment. They are resilient and can withstand harsh conditions with few resources.

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What are invasive species?

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A non-native plant, animal, or other organism that spreads beyond its original introduction and causes or is likely to cause harm.

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What are indicator species?

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A plant, animal, bird, insect, or microorganism that reflects the health of its environment.

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What is secondary succession?

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The ecological process that occurs in an area where a disturbance has destroyed an existing community but left the soil intact.

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What is a keystone species?

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A species that has a disproportionately large effect on its environment relative to its abundance.

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What is ecological succession?

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The process of change in the species structure of an ecological community over time.

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What is a climax community?

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A stable and mature community that undergoes little or no change in species over time.

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What is a disturbance in ecology?

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An event that changes a community by removing organisms or altering resource availability.

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What is biodiversity?

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The variety of life in the world or in a particular habitat or ecosystem.