Species Diversity AS AQA biology Unit 2
- Created by: Chloe
- Created on: 30-05-13 16:24
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- Species Diversity
- Number of different species in given area
- proportion of community made up of individual species
- 2 areas may have same number of different species but the proportion may differ hugely
- Measuring species diversity
- d=N(N-1) / En(n-1)
- gives a value that makes it easier to compare between bio-variety of different areas. More precise
- d=N(N-1) / En(n-1)
- higher 'd' greater S.D.
- Areas with greater species diversity will be more able to adapt to changing conditions.
- Agriculture select species for qualities making them more productive reducing no. of alleles to just the desired few.
- Space claimed for desired product, reducing space for others, reducing BD.
- Deforestation - forest, many layers for different species, reduced to just one. ^ competition, species diversity v
- Animals have less habitat. Only some can adapt, many die, loss of species.
- Sp. diversity REDUCED
- Animals have less habitat. Only some can adapt, many die, loss of species.
- Agriculture select species for qualities making them more productive reducing no. of alleles to just the desired few.
- competition
- pesticides
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