AQA · Biology · 8461
GCSE Biology: Maintaining biodiversity
Ecology · AQA GCSE Biology (8461), specification point 4.7.3.6. Cards are generated from the exam board's own specification for "Maintaining biodiversity", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is the purpose of breeding programmes for endangered species?
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To increase the population of endangered species so they are less likely to become extinct, helping to maintain biodiversity.
Why are field margins and hedgerows reintroduced in monoculture farmland?
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They provide habitats and food for a wider range of species, increasing biodiversity where only one crop type is grown.
What is a monoculture in agriculture?
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Growing only one type of crop over a large area, which reduces biodiversity.
Recycling resources rather than dumping waste in ? helps maintain biodiversity.
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landfill
How does reducing deforestation help maintain biodiversity?
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It protects the habitats of many species, preventing their loss, and reduces carbon dioxide release into the atmosphere.
Why does protecting and regenerating rare habitats help maintain biodiversity?
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Rare habitats support species found nowhere else; restoring them lets those species survive and populations recover.
Give one example of a positive human interaction with an ecosystem.
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Any one of: breeding programmes for endangered species, protecting rare habitats, reintroducing hedgerows, reducing deforestation, or recycling waste.
Who puts in place programmes to reduce the negative effects of humans on biodiversity?
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Scientists and concerned citizens (and, for deforestation and CO₂ emissions, some governments).
Some governments reduce deforestation and ? emissions to protect biodiversity.
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carbon dioxide
Why can maintaining biodiversity create conflicting pressures?
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Protecting habitats and species can conflict with economic needs such as farming, housing, industry and jobs, so costs and benefits must be weighed.
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