3.4.6 Biodiversity Within A Community

Question 1

Define biodiversity

Answer 1

The range and variety of genes, species and habitats within a particular region

Question 2

What does the index of diversity do?

Answer 2

Puts a figure to biodiversity, allowing us to numerically compare

Question 3

What is species richness?

Answer 3

A measure of the number of different species in a community

Question 4

What can the diversity index be used for?

Answer 4

Can be used to compare biodiversity of different ecosystems, or to monitor change in biodiversity in a community over time
Greater biodiversity= more healthy community

Question 5

How does deforestation reduce biodiversity?

Answer 5

Deforestation is done to increase area for farmland; reduces number of trees and tree species
Destroys habitats so species die or migrate

Question 6

How does a growing human population effect biodiversity?

Answer 6

Growing human population = more demand for food = maximise food production, at the expense of biodiversity

Question 7

How does the removal of hedgerows reduce biodiversity?

Answer 7

Done to increase size of fields= farming is more efficient; reduces number of hedgerows and hedgerow species
Destroys habitats = species die/ migrate