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Biodiversity and human impact

5 lessons in Ecology.

25 exam questions · 55 marks

7.11 Biodiversity, pollution and waste What biodiversity is and why it matters, how a growing human population uses more resources and produces more waste, and how pollution of water (including eutrophication), land and air reduces biodiversity. AQA Edexcel OCR 7.12 Land use, deforestation and peat bogs How humans reduce the land available for other animals and plants (building, quarrying, farming, waste), the destruction of peat bogs for compost, and large-scale tropical deforestation, with their effects on carbon dioxide and biodiversity. AQA OCR 7.13 Global warming and living things How global warming, caused by rising carbon dioxide and methane, affects living things: loss of habitat, changes in the distribution of species, changes in migration patterns and reduced biodiversity, and (OCR Higher) evaluating evidence for these changes. AQA OCR 7.14 Maintaining biodiversity How scientists, governments and individuals try to reduce the negative effects of humans on ecosystems: breeding programmes, protecting and regenerating habitats, hedgerows and field margins, reforestation, recycling, ecotourism and international agreements, and the conflicting pressures involved. AQA Edexcel OCR 7.15 Fish farming, invasive species and indicator species Edexcel: the positive and negative effects of fish farming and of introducing non-indigenous species on biodiversity, eutrophication, and (Biology only) indicator species that show water and air pollution, such as stonefly nymphs, bloodworms and lichens. Edexcel