Ecology Test #2 Review

Front

What is an invasive species?

Back

An invasive species is a non-native organism that, when introduced to a new environment, can cause harm to the ecosystem, economy, or human health.

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What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species, genetic diversity, and ecosystem diversity.

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What is a keystone species?

Back

A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance, often maintaining the structure of the ecosystem.

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How do macroinvertebrates indicate water quality?

Back

The presence of pollution-intolerant macroinvertebrates indicates good water quality, while the absence of these organisms suggests poor water quality.

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What are pollution-tolerant macroinvertebrates?

Back

Pollution-tolerant macroinvertebrates are organisms that can survive in polluted waters, such as aquatic worms and black fly larvae.

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What is the impact of exotic species on native biodiversity?

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Exotic species can lead to a loss of native biodiversity by outcompeting native species for resources, introducing diseases, or altering habitats.

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What is the difference between exotic and invasive species?

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Exotic species are non-native species introduced to an area, while invasive species are a subset of exotic species that cause harm to the environment.

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What role do keystone species play in an ecosystem?

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Keystone species help to maintain the structure and balance of an ecosystem, and their removal can lead to significant changes in the ecosystem.

Front

What is the significance of high biodiversity in an ecosystem?

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High biodiversity increases ecosystem resilience, productivity, and stability, allowing it to better withstand environmental changes.

Front

What are some characteristics of invasive species?

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Invasive species often reproduce quickly, have few natural predators, and can thrive in a variety of environments.