factors affecting population size

• what are the 8 types of environmental resistance


  food availability, overcrowding, predation, disease, parasitism, weather, accumulation of toxic waste and competition
• what is meant by density dependent factor


  factors that have a greater effect the larger the population size
• what is meant by density independent factors


  factors that have an effect regardless of the size of the population
• what is more likely to cause a population crash , density dependent factors or density independent factors


  density independent factors
• what is more likely to slow down population growth density dependent factors or density independent factors

  density dependent factors
• give examples of density dependent factors

  disease and parasitism food availability and toxic waste build-up
• give examples of density independent factors


  flood fire and sudden and temperature changes
• do all populations in nature grow in the way of the population growth curve explain your answer


  no because of factors such as environmental resistance density dependent and density independent factors
• what is the size of a population regulated by


  the balance between birth and death rate
• what is the equilibrium of a species population known as

  the carrying capacity
• list the resources that plants compete for


  sunlight space water and nutrients
• what is the resources that animals compete for


  food habitats space and mates
• what is competition


  the struggle between organisms to survive as they attempt to use the same limited resources
• what is meant by a niche


  this is the ecological role and position a species takes within an ecosystem
• what are the two types of competition


  intraspecific and interspecific
• what is meant by intraspecific competition


  competition between members of the same species
• what is meant by interspecific competition


  competition between different species