Ecosystem basics

The basics on ecosystems.

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  • Ecosystem Basics
    • what is an ecosystem?
      • A set of relationships between all of the organisms and non-living factors in a particular area.
      • they can vary in size
        • E.G. a forest environment
    • What is a biome?
      • an area with a distinctive climate and vegetation e.g. a tropical biome
      • they often cover large areas, often across multiple countries.
    • Nutrient cycles
      • carbon and nitrogen
      • Plants take CO2 from the air and nitrogen from the soil. These create plant matter.
      • these nutrients are passed along the food chain through feeding
      • When plants and animals die, they are broken down by saprobiotic organisms such as bacteria and fungi.
        • Nutrients are returned to the soil to be used again by plants
      • Plants, animals and decomposers all release CO2 back into the atmosphere through respiration.
    • Abiotic factors
      • Non-living factors
        • Climate, Ph of the soil, light intensity etc.
    • Biotic Factors
      • Living factors
        • Untitled
  • organisms depend on physical factors and each other to survive, so relationships between organisms are important
    • what is an ecosystem?
      • A set of relationships between all of the organisms and non-living factors in a particular area.
      • they can vary in size
        • E.G. a forest environment

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