Species diversity and human activities
- Created by: Kittykatty2000
- Created on: 23-04-17 13:28
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Impact of agriculture:
- Agricultural ecosystems are controlled by humans
- Farmers often select species for particular qualities that make them more productive
- As a result the number species and the genetic variety of alleles the possess is reduced to the few that exhibit the desired features
- To be economic the number of individuals of these desired species needs to be large
- Any particular area can only suport a certain amount of biomass
- If most of the area is taken up by the one species that the farmer considers desirable it follows that there if a smaller area available for all the other species
- These many other species have to compete for what little space and resources are available
- Many will not survive this competition
- Even if species evolved to adapt to changes the population of the species would be considerably reduced
- Pesticides are used to exclude these species because they compete for light, mineral ions, water and food required by the farmed…
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