Factors affecting biodiversity
- Created by: Natasha Granville
- Created on: 13-05-18 17:51
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- Factors affecting biodiversity
- Human population growth
- Deforestation
- to create space for roads, building and agriculture
- to provide wood for building and fuel
- reduces habitats, reduces species biodiversity
- Deforestation
- Agriculture
- pesticides and herbicides
- destroys pest species
- destroys food sources for other organisms
- destroys pest species
- monoculture
- the cultivation of only a single crop in a given area
- fewer animal species can be supported
- the cultivation of only a single crop in a given area
- pesticides and herbicides
- Climate change
- melting polar ice caps
- extinction of species in this region
- migration of animals to find favourable conditions
- rising sea levels
- flooding
- reduction in habitats
- flooding
- hotter temperatures and increased rain
- xerophytes become more dominant
- extinction of plants that cannot survive
- xerophytes become more dominant
- insect life cycles and populations change
- less pollination of plants
- melting polar ice caps
- mutations
- creates new allele
- gene flow caused by interbreeding
- selective breeding
- captive breeding
- small number of individuals available for breeding
- genetic bottlenecks
- when large numbers of a population die prior to reproducing
- founder effect
- a small number of individuals create a new colony
- genetic drift
- frequency of occurrence of an allele varies
- Human population growth
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