Environmental Changes and Biodiversity

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  • Environmental Changes
    • Causes
      • Human
        • Climate change
          • Rubbish dumps/landfill
          • Overpopulation = more land required --> deforestation etc
      • Seasonal
        • Temperature
        • Amount of rainfall
        • Availability of water
        • Levels of dissolved gas in water
        • Hours of daylight
      • Geographic
        • Climate change
          • Variations in the tilt/orbit of the Earth
          • Melting permafrost releases methane
        • Immediate environment
          • Different pH levels or types of soil
          • Altitude
          • Saltiness of water
          • Availability of water
    • Impacts
      • Water
        • Rising sea levels leads to loss of habitat
      • Temperature
        • Invasive species which disrupt food chains/webs
          • Species
            • Many species will not be able to adapt fast enough for their changing environment so will not survive
        • Changes in migration patterns
      • Soil
        • pH - different levels suit different organisms so if too acidic or too alkali, some species will die.
      • Gases in atmosphere
        • Acid rain --> damages plants etc, pollutes water supplies so damages habitats
      • Species
        • Many species will not be able to adapt fast enough for their changing environment so will not survive
    • Example
      • Puffin populations in Northern Scotland are struggling to raise their chicks due to rising sea temperatures reducing the number of small fish available that the puffins feed on. This means they made need to move to a new breeding site to survive.
  • Geographic
    • Climate change
      • Variations in the tilt/orbit of the Earth
      • Melting permafrost releases methane
    • Immediate environment
      • Different pH levels or types of soil
      • Altitude
      • Saltiness of water
      • Availability of water

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