AQA · Biology · 8461
GCSE Biology: Impact of environmental change
Ecology · AQA GCSE Biology (8461), specification point 4.7.2.4. Cards are generated from the exam board's own specification for "Impact of environmental change", and every card links back to the page it came from. Higher tier only. Separate science only. Specification © AQA — used with attribution.
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Environmental changes affect the ? of species in an ecosystem.
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distribution
How does a change in water availability affect a species?
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It changes the species' distribution in the ecosystem — organisms move to, or survive only in, areas where enough water is available.
Give three environmental changes that alter species distribution.
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Temperature, availability of water, and composition of atmospheric gases.
A change in the composition of ? is an environmental change that affects species distribution.
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atmospheric gases
What are the three causes of environmental changes affecting species distribution?
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Seasonal, geographic, or human interaction.
Environmental changes may be seasonal, geographic, or caused by ?.
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human interaction
Give an example of a seasonal environmental change affecting species distribution.
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A drop in temperature in winter, which causes some species (e.g. migrating birds) to move to warmer areas.
What does 'distribution of a species' mean?
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Where a species is found (lives) within an ecosystem or area.
Why might rising temperature change where a species is found?
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Organisms can only survive within a certain temperature range, so they move to, or only persist in, areas that stay within it.
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