11.6 Factors Affecting Biodversity

Question 1

How are humans negatively influencing biodiversity

Answer 1

Deforestation - removal of forest to provide wood for building and fuel and to create space for roads, building
Agriculture - land being cleared ad planted with a single crop in order to feed population
Climate change - release of co2 and other pollutants form burning of fossil fuel is increasing global temperatures

Question 2

What things cause deforestation

Answer 2

Can occur naturally - forest fires
Result of human action - deliberate
Indirectly human action - acid rain which form as as result of pollutants in atmosphere

Question 3

How deforesation affects biodiversity

Answer 3

• reduces the number of trees preset in area
• specific tree types felled reduces species diversity
• reduces animal species as habitat destroyed including food source and home
• animals migrating to neighbouring areas resulting in in increase of other areas

Question 4

How agriculture affects biodiversity

Answer 4

To be economically viable techniques are used to produce as much as possible of there chosen species this leads to reduction is biodiversity eg
- deforestation - increase area of land available for growing
- removal of hedgerows - reduces plant species destroys habitat
- I’ve of chemicals eg pesticides - destroys pest species and destroys food source og other organisms
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Question 5

Climate change affect on biodiversity

Answer 5

• melting of polar ice caps - extinction of few plant nd animal species
• rising seas levels - reduces available terrestrial habitats and water flowing further up rivers reducing habitat of freshwater plants and animals living near
• higher temperatures less rainfall - plant species failing to survive so drought resistant species becoming more dominant