Biodiversity RG

• What is biodiversity


  The variety of living organisms in an area
• What is a habitat 


  The place an organism lives
• What is a species

  A group of similar organisms able to reproduce to give fertile offspring
• What is a community

  All the populations of different species in a habitat
• what do areas of HIGH biodiversity have?

  lots of different species
• What can biodiversity be considered at?

  a range of scales from the local to the global
• what 2 scales can biodiversity be considered at?

  local biodiversity

  global biodiversity
• Explain LOCAL biodiversity?


  You could consider the variety of different species living in a small habitat that is local to you eg pond

  • some habitats will be more biodiverse than others
• Explain how you could consider global biodiversity?


  you could consider the variety of species on earth.

  biodiversity varies in different parts of the world
• where is biodivversity greatest?

  At the equator
• where does biodiversity DECREASE?

  Towards the poles
• how can biodiversity be measured?

  using an index of biodiversity
• what is species richness?

  a measure of the number of different species in a communiyu
• how can species richness be worked out?

  by taking random samples of a community and counting the number of different species
• what is species richness also a SIMPLE measure of?

  biodiversity
• What affects biodiversity?

  • the number of different species in a community
  • the population sizes of those species
• give 2 ways of measuring biodiversity?

  1. species richness
  2. index of diversity
• what is index of diversity a way of measuring?

  biodiversity
• index of diversity equation

  
• what does the index of diversity take into account?

  The number of species in a community (species richness) and the abundance of each species (Population sizes) are both taken into account
• what does a higher the number (index of diversity) mean?

  the more diverse the area is
• if all individuals are of the same species (eg no biodiversity) , what is the index of diversity?

  1
• when is there no biodiversity?

  if all individuals are of the same species
• what reduces biodiversity?

  agricultural practices