Biodiversity within a community

• Define community

  A group of organisms of different species living in the same area at the same time
• Define species richness

  The number of different species in a particular area
• Define abiotic factors

  Non living factors in an area
• Define biotic factors

  Living factors in an area
• Define a niche

  How an organism adapts to its biotic and abiotic environment to avoid competition
• Define ecosystem

  The combination of abiotic and biotic factors in an area
• What are farming techniques that reduce biodiversity?

  -Woodland is cleared to make pasture land for livestock to graze

  -Hedgerows are removed to make pasture land bigger

  -Wetlands are filled in to make pasture land bigger

  -Pesticides and herbicides are used to reduce competition for crops

  -Monocultures are created to reduce competition for crops
• What does conservation provide?

  -Areas of outstanding natural beauty and interest

  -A greater variety of food and medicines

  -Help for farming because it increases the variety of pollinators

  Conservation must be balanced with the need for efficient food production
• What is the equation to calculate diversity index?

  DI = N(N-1)/sum n(n-1)

  N = total number individuals collected

  n = number individuals of species