Topic Summaries

Maintaining biodiversity

IGCSE > Biology > Pearson IGCSE > IGCSE Biology Topic Summaries > Biodiversity and environmental management > Maintaining biodiversity
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Stem cells, microscopy, and microorganisms

Pathogens and non-specific immunity

Plant disease and monoclonal antibodies

Resource cycles and environmental change

Science skills: Measuring results

Negative effects of humans on ecosystems and biodiversity Strategies to reduce negative impacts of humans on ecosystems and biodiversity
Deforestation increases global warming and destroys species' habitats Protection and regeneration of rare habitats, such as rainforests
Burning fossil fuels increases global warming and industrial processes pollute air and habitats with waste chemicals Reduction of deforestation and carbon dioxide emissions by some governments
Build-up of plastic rubbish in the oceans Recycling resources rather than dumping waste in landfills
Overfishing damages wild food chains Quotas on fishing
Oil spills can kill aquatic organisms and species (e.g. sea birds, sea otters, seals) Breeding programmes for endangered species to promote reproduction varied gene pool

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