Friday 9/17/10

9/17/10 Scribepost

Today in class, the first thing we did was take lab 58 (pages 355-361) out of our workbook. After that, we discussed on how to measure the population density of an area.

To measure the population density:

1.) Set up a quadrant of 1 square meter. Measuring carefully, place four stakes (tongue depressors) 1 m apart at the corners of the square.

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2.) Then tie a piece of string around the perimeter of the quadrant.

3.) To count the plants in your quadrat accurately, you will have to divide the quadrat into smaller areas. Lay the meter stick along one side of the quadrat. Lay a piece of string across the quadrat 10 cm from the boundary. Count the number of the different types of plants in section 1 of the quadrat.

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4.) Repeat step 3 until you have counted the 10 sections of your quadrat. Use the meter stick and string to mark off the section you are counting.

5.) Total the numbers of the different types of plants counted in your quadrat.

6.) Copy the data. Then add the columns to get the totals for each plant. Divide each total by the number of groups to calculate the population densities of the types of plants/m2.

After talking about how to measure the population density, we went outside and measured the population density of a location. We counted the total number of the plantains, clovers, and dandelions.

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*Note- Homework:
•Project due 9/23
•Test 9/28
•Read 5.1 and 5.2 - Quiz Monday
•Invasive species poster 9/27 - UP 27-28
www.invasivespecies.gov
www.issg.org
www.nps.gov/plants/alien
www.usgs.gov/invasive_species/plw
www.invasive.org
www.great-lakes.net/flora-fauna/invasive/invasive.html