Biodiversity

  • Created by: charley
  • Created on: 29-08-18 17:19

Biodiversity

  • Biodiversity refers to species richness in a given environment and the number of organisms within each species.
  • The number of species and organisms depends on the environment.
  • Biodiversity can increase or decrease due to succession, natural selection and human influence.
  • A biodiversity index can be used to monitor a habitat and compare the biodiversity in different habitats.
  • Simpsons index can be used to calculate biodiversity. The higher the value the higher the biodiversity 
  • Polymorphism is the occurance of more than one phenotype in a population that cannot be accounted for by mutation alone
  • The more single nucleotide polymorphisms and hyper-variable regions a population has, the more differences in it DNA fingerprints and the greater the biodiversity.
  • Natural selection generates biodiversity but can also reduce it
  • Adaptation is the change in a species as a useful characteristic becomes more common
  • Anatomical, physiological and behavioural traits are examples of adaptive traits
  • Selection pressures are environmental factors that affect an individuals reproductive success
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