Posts Tagged ‘immigration’


Tuesday, January 11th, 2011

kidney beans by Dey on flickr

We are going to learn about populations and what affects them.  In particular:

  • How is population size affected by natality, mortality, immigration and emigration?
  • What does a typical population growth curve look like?
  • What are the reasons for the exponential, plateau and transitional phases?
  • What is the carrying capacity of an environment?
  • What factors limit populations from increasing indefinitely?

This is a useful presentation.  Here’s another: 5.3 Populations

And we are going to use the Lincoln Index to estimate the size of a population of kidney beans.  This is a simulation exercise, with the beans representing organisms such as woodlice.  But the beans don’t move, so are a bit more collaborative 🙂

IB Biology Lab Sheet – Lincoln Index