Nov 14 2011
Succession Slidedeck
Succession View more presentations from Derrick Willard
Tag Archive 'ecology'
Nov 07 2011
Keystone and Foundation Species Slidedeck
Since I made a slidedeck to go with the homework, I took scribe duties. BONUS: Below the slides is a short YouTube clip that explains how the elephant could be a keystone species. -W Keystone and Foundation Species 2011 View more presentations from Derrick Willard
Nov 04 2011
Species Interactions Slidedeck
Here is the slidedeck from today’s lesson about species interactions. We discussed many examples of coevolution that produced these relationships and the population dynamics that result. You can play them within the blog or go to my Slideshare page to play them full size. I don’t like to use Power Point often, but it provides [...]
Oct 03 2011
Davidson Field Trip Podcast
This 18-minute video was made by me a few years ago. While it is a bit grainy, it covers the major field research techniques I try to show students at Davidson each year. A good review if you have the time: You can also check out MattP’s post that reviews our day. *Note: The Internet [...]
Oct 02 2011
Davidson Field Trip
At Davidson we learned how to conduct out-door experiments through use of a line transect, quadrats, sweep nets, drift fences, and cover boards. To take random samples of detritus from the forest floor, we had to represent the area as a grid to use a method called a grid transect. Next we used a random [...]
Sep 27 2011
Ecological Efficiency/ Energy Flow
This diagram illustrates a trophic level pyramid. You’ll notice that at each step the quantity of Kilo Calories (the same measurement of energy you would see on your cereal) decreases by ninety percent; this is because energy conversion isn’t that efficient, and that’s the big lesson to take away. Speaking of inefficiency, every ecosystem is [...]
Sep 27 2011
Intro to Ecology
In class Monday, we discussed the importance and fundamental ideas of Ecology. Ecology, known as the interaction between biotic and abiotic components in an ecosystem, is one of the most important units in this course (pretty thrilled you missed the notes, right?). These interactions include how abiotic factors in an ecosystem like pH, temperature, salinity, [...]
