Biodiversity
- Created by: jessicawarren
- Created on: 24-05-16 20:27
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- Biodiversity
- Variety of organisms
- Biodiversity: Variety of living organisms in an area
- Habitat: The place where an organism lives
- Community: All the populations of different species in a habitat
- Scales
- Local- variety of different species living in small, local habitat. Some habitats more biodiverse than others
- Global- variety of species on Earth. Recent studies put total number of species at 8.7 million. Biodiversity greatest at equator, decreases towards poles
- Reducing Biodiversity
- Farmers try to maximise amount of food which can reduce biodiversity
- Woodland clearance- increases area of farmland, reduces number of trees/number of different tree species, destroys habitats, some species lose shelter and food source. Species will die/be forced to migrate, reducing diversity
- Hedgerow removal- increases are of farmland, turns lots of small fields into fewer large ones, reduces biodiversity
- Pesticides- chemicals that kill organisms that feed on crops, reduces diversity by directly killing pests. Species that feed on pests will lose food source, their numbers can decrease too
- Herbicides- chemicals that kill weeds, reduces plant diversity/number of species that feed on weeds
- Monoculture- farmers have fields containing one type of plant. Single type reduces biodiversity directly, will support fewer organisms, further reduces biodiversity
- Conservation techniques- legal protection for endangered species, creating protected areas to restrict agricultural development, Environmental Stewardship Scheme
- Variety of organisms
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