4.6 BIODIVERSITY WITHIN A COMMUNITY Flashcards
1
Q
What is the definition of biodiversity?
A
A range of habitats, from a local habitat to the whole earth.
2
Q
What is species diversity?
A
The number of different species in a community.
3
Q
What is genetic diversity?
A
The number of different species in a population.
4
Q
What is ecosystem diversity?
A
The number of different habitats in an area.
5
Q
What is species richness?
A
A measure of the number of different species in a community.
6
Q
What does Simpson’s diversity index show?
A
The relationship between the number of species in a community and the number of individuals in a species.
7
Q
How do farming techniques reduce biodiversity?
A
- Human control yields, so reduces the variety of alleles.
- Farmland is just used for one species, so reduces biodiversity.
8
Q
How can you balance farming with conservation?
A
- Use hedgerows instead of fencing to make more habitats.
- Grow different crops, intercropping, in the same area.
- Reduce the use of herbicides & pesticides.
- Don’t drain all wetlands, preserve some of them.
