AQA GCSE Biology

Revision Notes

7.3.6 Maintaining Biodiversity

Postive & Negative Human Impact

  • The increasing human population and the activities of humans (including waste production, peat bog destruction, deforestation and our contributions to global warming) are causing a reduction in global and ecosystem-level biodiversity
  • These activities are considered as negative human interactions with ecosystems
  • There are, however, ways in which humans can interact positively with ecosystems

Methods to reduce negative impact on ecosystems & protect biodiversity

Methods used to reduce our negative impact on ecosystems and protect biodiversity_1, downloadable IGCSE & GCSE Biology revision notes

There are many conflicting pressures on maintaining biodiversity. Some examples include:

  • The cost of programmes:
    • Protecting biodiversity can be very expensive
    • Eg. the land used for field margins could be used by farmers to grow crops and sell them – governments sometimes pay farmers a subsidy to make up for the lost money
    • It costs money to check that programmes designed to maintain biodiversity are actually being followed
  • Protecting food security:
    • Land that is protected to maintain biodiversity could instead be used for farming – this can cause conflict in areas where there are food shortages
    • Sometimes organisms seen as a threat by farmers (eg. locusts and wolves) are killed to protect crops and livestock – this can negatively affect food chains / biodiversity and can cause conflict when species that are already under threat due to hunting or habitat loss are involved (eg. lions in parts of Africa)
  • The development of society:
    • Increasing amounts of land are required to sustain the increasing human population
    • Eg. land required for new housing developments or for new agricultural land in developing countries
    • This high demand means that land with undisturbed habitats and high biodiversity is increasingly being used for development

Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
Close

Join Save My Exams

Download all our Revision Notes as PDFs

Try a Free Sample of our revision notes as a printable PDF.

Join Now