Biodiversity

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  • Biodiversity
    • Different levels
      • Habitat biodiverisity
        • Number of different habitats in an area
        • Living (Biotic) factors
          • Availability of food
          • Presence of predators
        • Physical factors
          • Soil
          • Temperature
      • Species biodiversity
        • Number of different species and species abundance in an area
      • Genetic biodiveristy
        • Variation of alleles within a species
        • Human blood group
    • Collecting data
      • Net
        • Aquatic animals
      • Quadrat
        • Plants
      • Pitfall trap
        • Ground insects
      • Sweepnet
        • Flying insects
    • Richness and evenness
      • Species richness
        • Number of different species in an area
        • Higher the number of species higher the richness
      • Species evenness
        • Measure of relative abundance of each species in an area
        • The similar the population size of each species the higher the species evenness
      • Simpsons index of diversity
        • Measuring species diversity
        • 1- sum (n/N)2
    • Importance of biodiversity
      • Economical
        • Food and drink
        • Clothing
        • Drugs
        • Fuels
      • Ecological
        • Distruption to food chain
        • Climate change
        • Disruption to nutrients' cycle
        • Loss of habitat
      • Ethical
        • Right thing to do
        • have a right to exist
        • Moral responsibilty
      • Aesthetic
        • Brings joy
        • Site of attraction
      • Agricultral
        • More biodiversity provides more defence against pollution
        • Source of food
        • Protection against disastors
        • Pest control
        • New varieties
    • Conservation
      • In-situ
        • Advantages
          • Both species and habitats are covered
          • Less distruptive
          • Larger populations can be covered
          • Chances of recovery are greater
        • Disadvantages
          • Difficult to control factors that threaten species
            • Poaching
            • Predators
            • Climate change
        • Methods
          • Establishing protected areas
          • Controlling and preventing the introduction of new species
          • Protecting habitats
          • Restoring damaged areas
          • Legal protection
      • Ex-Situ
        • Methods
          • Relocation of corgansims
          • Breeding organsims
          • Use of controlled environments eg: Botanical gardens
          • Seed banks
        • Advantages
          • Protect individual organisms
          • Predation and hunting can be managed easily
          • Competition can be reduced
          • Used to reintroduce species
          • Health care
        • Disadvantages
          • Only small number can be conserved
          • Less successful
          • Involves adapting to new environment

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