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biodiversity (studying biodiversity (sampling methods (sweep netting=…

- - - - systematic= when you take samples at fixed intervals often along a line e.g. transcet
      - opportunistic= this is when samples are chosen by investigator, data is biased
      - stratified= this is when different areas in a habitat are identified and sampled separately in proportion to their part of the habitat at a whole
- - - - aims to develop international strategies on the conservation of biodiversity and how to use animal and plant resources in a sustainable way
      - biodiversity is everyones responsibility
      - provides guidance to governments on how to preserve biodiversity
      - shared access to genetic resources
    - - regulates trade in wild animals and plant specimens
      - illegal to kill endangered species
      - conserve species by limiting trade through licencing and making it illegal to trade in products from an endangered species
- - - - habitat loss= human development destroys habitats
      - over exploitation= a greater demand for resources e.g. food, water, energy means a lot of resources are being used up faster than they can be replenished. this decreases genetic and species diversity
      - urbanisation= cities and roads isolate species meaning populations cannot interbreed and decreases genetic diversity
      - pollution= high amounts of pollutants can kill species or destroy habitats , decreasing biodiversity
    - - habitats are lost as land is cleared to make way for large fields
      - local and naturally occurring plants and animals are seen as weeds and pests so are destroyed with herbicides and pesticides, reducing species diversity
      - heritage varieties of crops are lost because they don't make enough money and are not planted anymore, reducing species diversity
    - - most species need a particular climate to survive
      - a change in a climate may cause an area that was inhabitable to become uninhabitable
      - this may increase or decrease the range of species, increasing or decreasing species diversity
      - some species may be forced to migrate to a more suitable area causing a change in species distribution, migrations decrease species diversity in areas the species migrate from and increase biodiversity in areas they migrate to
      - if there isn't a suitable habitat to migrate to the species will go extinct, decreasing biodiversity
    - - rate of extinction has increased
      - increasing human activity causes extinction
      - it is believed that we are at the start of a great mass extinction event
- - - - organisms in an ecosystem are interdependent, depend on eachother for survival
      - disruption of food chains and disruption of nutrient cycles
    - - provide us with: food and drink, clothing, drugs, fuels, other industrial materials
      - many genetic resources are important to the global economy
      - genetic resources allow us the adapt to changes in the environment