StemUp: AQA A level Biology 3.4.6 Biodiversity within a community

What is meant by biodiversity? (1)

Refers to the number and variety of living organisms in a particular area

Can biodiversity relate to different scales of habitats? (3)

- Yes

- Biodiversity can relate to a range of habitats

- From a small local habitat to the Earth as a whole

What is meant by 'species richness'? (1)

A measure of the number of different species in a community

What is the use for the index of diversity? (2)

- Describes the relationship between the number of species in a community

- And the‎‏‏‎ ‏‏‎‎‏‏number of individuals in each species

State the formula for the index of diversity (5)

What human activities can reduce biodiversity? (2)

- Deforestation

- Farming practices

- Such as using large areas of land to grow single crops

How does deforestation and farming practices affect plant species and habitats? (2)

- Causes a decrease in the variety of plant species

- Causes a decrease in the number and variety of habitats

How is the variety of food sources affected by deforestation and farming practices? (1)

Causes a decrease in the variety of food sources

Describe the impact on animal diversity due to human practices (2)

- Causes a decrease in animal diversity

- Due to the reduction in plant variety, habitats, and food sources

Why is it important to conserve habitats? (1)

To maintain biodiversity for future generations