Human Impacts on Biodiversity

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  • Human Population Explosion
    • Increased Pollution
      • air
        • CO2 and methane trap energy from the sun
          • good in moderation, but too much leads to global warming
            • Global Warming
              • rising sea levels
                • Habitats destroyed
                  • Reduced Biodiversity
              • changes in migration patterns
                • changes distribution of organisms
                  • e.g. each year in Africa, large numbers of giant wildebeest migrate, as the rainfall pattern changes
                  • e.g. the european bee-eater bird is a Mediterranean species but it is now present in parts of germany
                  • some species of lichen can't grow in areas where sulphur dioxide is given out by certain industrial processes
                  • caused by
                    • human interaction
                    • seasonal factors
                    • geographic factors
              • Reduced Biodiversity
              • increases temperature
                • changes distribution of organisms
                  • e.g. each year in Africa, large numbers of giant wildebeest migrate, as the rainfall pattern changes
                  • e.g. the european bee-eater bird is a Mediterranean species but it is now present in parts of germany
                  • some species of lichen can't grow in areas where sulphur dioxide is given out by certain industrial processes
                  • caused by
                    • human interaction
                    • seasonal factors
                    • geographic factors
              • changes in availability of water
          • smoke + acidic gases released into the atmosphere
          • acid rain
            • Habitats destroyed
            • changes composition of atmospheric gases
            • water
              • chemicals to help grow crops can be washed into water
                • Farming
                  • Global Warming
                    • rising sea levels
                      • changes in migration patterns
                        • increases temperature
                          • changes in availability of water
                          • drained / cleared for use as farmland
                            • Peat Bog destruction
                              • adds CO2 to atmosphere
                              • Deforestation
                                • to grow crops to produce biofuels
                                • adds CO2 to atmosphere
                                  • less CO2 taken in
                            • sewage + toxic chemicals from industry
                            • pollute lakes, rivers, oceans
                            • land
                              • toxic chemicals for farming
                              • nuclear waste buried underground
                              • Dumping household waste
                          • Increased use of non renewable resources
                            • combustion of fossil fuels
                              • for raw materials (e.g. oil for plastics)
                              • for energy (for manufacturing processes and appliances)
                            • Increased Land Use to Support Population
                              • Housing, shops, industrial land, Quarrying
                                • Dumping household waste
                                • Farming
                                  • drained / cleared for use as farmland
                                    • Peat Bog destruction
                                      • Deforestation
                                        • to grow crops to produce biofuels
                                        • less CO2 taken in

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