biodiversity

• biodiversity 


  variety of living organisms
• biodiveristy assessed by 


  species richness

  genetic diversity

  number of different ecosystems and habitats
• species richness


  number of different species in a habitat
• genetic diversity 


  genetic variation found in a particular species, number of alleles in gene pool
• endimism 


  a species which only exists in one area
• the threat of human activity to biodiversity

  • habitat destruction
  • hunting
  • over exploitation
  • agriculture eg fertilisers or pesticides