Scientists at Work- Turtles and TEDs

Hey guys,
I found this entry written by a postdoc at the University of Washington. Check it out - it has a great video of a TED in action!

http://scientistatwork.blogs.nytimes.com/2011/03/22/how-to-not-catch-a-sea-turtle/?ref=science




-Asya

Questions to consider while reviewing for Exam #2

What is the relationship between r and λ? How is λ related to the stable age distribution (SAD)? What determines SAD / what would make a population's SAD change?

For the metapopulation model, what does it mean when df/dt=0? What symbol is used to represent the fraction of patches occupied at this state?

What are the differences between interference and exploitative competition? Describe and give examples. Can these have the same effects on population growth of the species involved?

Explain how the logistic growth equation can be thought of as modelling competitive interactions. Is this incorporated in the Lotka-Volterra models anywhere? How? Would it ever make sense to NOT incorporate this?

In the simple LV competition model, we use the notation that β is the effect of species 1 on the growth of species 2. Would β change if there were more of species 1? Would β change if there were more of species 2?

To answer the previous questions - no, not in this model. β is per capita effects. But would it ever make sense to have β change? Give an example that illustrates what β represents.

Exam 2 Review Sessions

Review sessions for the second exam will be held:

Sunday, 20 March, 7-9pm in the Walter Hall conference room
Monday, 21 March, 4-6pm in Salomon 202

Come prepared with questions!

Homework 2

Homework 2 is now available through MyCourses. It is due next Wednesday at 5pm.

You will need the Populus software to complete it. Populus can be downloaded here: http://www.cbs.umn.edu/populus.

Also, I changed my office hours to an hour earlier on Wednesdays.