Test 1.3-Changes in Ecosystems 2024

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What is an ecosystem?

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An ecosystem is a system made up of all the biotic (living) and abiotic (non-living) factors in an area and all the interactions among them.

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What is primary succession?

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Primary succession is the process by which a new community forms in an area where no community previously existed, such as after a volcanic eruption.

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What are pioneer species?

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Pioneer species are the first organisms to colonize a barren environment in the process of ecological succession.

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What is secondary succession?

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Secondary succession is the process of recovery that occurs in an ecosystem after a disturbance that does not completely destroy the community.

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What is a climax community?

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A climax community is a stable, mature community that undergoes little or no change in species over time.

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What role do invasive species play in ecosystems?

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Invasive species can disrupt local ecosystems by outcompeting native species for resources, leading to declines in biodiversity.

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What is biodiversity?

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

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What is the difference between biotic and abiotic factors?

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Biotic factors are living components of an ecosystem (like plants and animals), while abiotic factors are non-living components (like water, soil, and climate).

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What is competition in an ecosystem?

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Competition occurs when two or more species or individuals vie for the same resources in an ecosystem, such as food, space, or light.

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What is the significance of lichen in primary succession?

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Lichen are often pioneer species that help break down rock into soil, facilitating the growth of other plants in primary succession.