Population ecology is the study of groups within a species that primarily interact with each other, and it examines how they live together in a geographic area to understand why these populations are different at one time and in a given place and in another. How is this useful to anyone? Hank uses the example of the West Nile virus outbreak in Texas to show you in this episode of Crash Course: Ecology.

Contents
1) Density and dispersion 02:03
2) Population growth 03:07
3) Limiting factors 03:45
a) Depends on density 06:16
b) Density independent 07:11
4) Exponential growth and logistics 08:04
5) How to calculate growth rate 09:33

The references:
http://www.latimes.com/news/nation/nationnow/la-na-nn-west-nile-virus-20120817,0,2506584.story
http://www.dshs.state.tx.us/idcu/disease/arboviral/westnile/information/general/myths/
http://en.wikipedia.org/wiki/Mosquito
http://www.nature.com/scitable/knowledge/library/population-limiting-factors-17059572
Campbell Biology 9th ed.

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