# Describe how human activities can reduce biodiversity within a community. In your answer, give two different human activities and for each one explain how it leads to a reduction in biodiversity.

> AQA A-Level Biology (7402) — 3.4.6 Biodiversity Within a Community · Describe · 5 marks

## Mark scheme (5 marks)

1. Names a relevant human activity (e.g. deforestation / habitat destruction / pollution / monoculture farming / urban development / overhunting / introduction of invasive species)
2. Explains how that first activity reduces biodiversity (e.g. deforestation removes habitats so fewer species can survive / fewer species present / species become extinct)
3. Names a second, different relevant human activity
4. Explains how that second activity reduces biodiversity (e.g. pollution kills organisms so fewer species survive / monoculture removes variety of plant species and reduces food sources for animals)
5. Explains that biodiversity is reduced because there is a smaller variety / number of different species (or a link is made to the definition: the variety of living organisms in an area)

## Key terms

- [biodiversity](https://www.gradenine.co.uk/glossary/biodiversity)
- [community](https://www.gradenine.co.uk/glossary/community)

## Related

- [Revision notes for AQA A-Level Biology (7402)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/describe-how-human-activities-can-reduce-234d677b) · Published by Druglandscape Ltd.