investigation global biodiversity

  • Created by: vezting
  • Created on: 10-04-16 10:31
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  • Investigating biodiversity
    • types of diverstiy
      • habitat diversity - a habitat is an area inhabited by a species. it includes physical factors and biological factors such as soil and predators
        • habitat diversity is the number of different habitats ins on area
      • species diversity- a species is a group  of simalar organisms that are able to reproduce and give fertile offspring
        • species diversity is the number of different species and the abundance of each specie in one area
      • species evenness is a measure of the relative abundance of each species in an area
      • species richness is the number of different species in an area
      • genetic diversity is the variation of alleles within a species, or within a population of species
    • collecting data
      • plants- quadrats
      • insects- pit fall trap
      • flying insects-  sweep net
      • aquatic animals- net
    • species
      • unnamed- scientists garre that a large proportion of the worlds species are unnamed, they have not yet been discovered
      • named species- named between 15.-1.75 million species - the number cant be exact as there is no central data base
      • global biodiversity is the total number of species on Earth
    • climate change
      • climate change is a significant long-term change of climate in an area- and it affects global biodiversity
      • 1:chsnging conditions means places would get warmer and others colder, more will get rainfall and some will get less
        • some species need a specific climate to survive, so habitats may become uninhabitable
          • this will increase or decrease certain species and it will involve migration or extinction of the species affected
      • changing the climate means that some disease carrying insects may be forced to migrate
        • Eg Malaria to  Europe
          • warmer and wetter conditions would also encourage fungal growth
      • changes in temp and rainfall will affect agricultural patterns
        • areas previously not suitable may now be suitable therefore increasing biodiversity
        • unexpected weather events could result in crop failure distrupting food chains, reducing biodiversity


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