1. Energy Dynamics Dry Lab Let’s kick some frass.

2. Lab Objective This lab will allow us to simulate the movement of energy through an ecosystem. In this case, we’re going to use a model, closed ecosystem so that we can take data. – Or, in our case, use mock data that simulates actual data. We will first look at the energy content in a group of sample plants. Then, we’ll set up a sample ecosystem consisting of plants and primary consumers.

3. Things to Know First, keep in mind there’s a lot of good info on the first page(s) of the lab. – If in doubt, read. Not contained there is information on the various species in our sample plant population and ecosystem. – So here goes…

4. Sample Plant Population The sample plant population is made up of Wisconsin Fast Plants®…remember them?

5. Sample Ecosystem The sample ecosystem will have 2.5 trophic levels: – Brussels sprouts – Cabbage butterflies And their waste, known as frass. http://dishbydish.net/wp-content/uploads/2012/08/brussel-sprouts-with-mushrooms-almonds17-e1345729581635.jpg http://www.zamzows.com/Documents%20and%20Settings/41/Site%20Documents/Garden/Garden%20Articles/Cabbage-Butterfly.jpg http://www.gardenworldimages.com/ImageThumbs/BEV950/3/BEV950_CABBAGE_WHITE_CATERPILLAR_FRASS.jpg

6. Frame of Mind The best way to think of the calculations in this exercise is to remember that you’re watching energy flow through the ecosystem. – Inputs and outputs of energy. When it comes to plants, what’s the input? – Sunlight. What’s the output? – Well…that might take some thinking – it’s actually three separate outputs. But you’ll get it. You need to think BROADLY. Think BIG PICTURE ECOLOGY STUFF.

7. Lastly… To help simulate a free response question on an exam, I’m going to stop my explanation here. Call me over for help. I’ll be vague but nudge you in the right direction. Last thing: – Follow the directions on the lab sheet, then fill your answers in on the data table. They match.