ecology lab 1 spatial distribution methods and results

# Meter by 1 meter and the hypotenuse of each

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meter by 1 meter and the hypotenuse of each individual square was measured and confirmed with the correct number. Each Plantago major was then marked with a flag and consequently measured with two distances. One was the distance of the plant from the left side of the quadrant

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perimeter and the other distance was that of the bottom side of the map area to the plant. These distances were all recorded in centimeters and the range included 0cm-400cm respectively for the entire 16 meter by 16 meter plot. -Statistical Approach A statistical analysis of the collected data was then performed. This included constructing figures using Microsoft Excel to represent spatial arrangement of the plants as well as frequency distribution. It was determined that the suitable size for the spatial arrangement graph would be that of 100cm by 100cm. The mean and variance were then calculated for each of the 3 frequency distribution graphs. The index of dispersion (I) was then calculated for the 3 frequency distribution graphs as well using the following equation. I= = This equation was used to find the degree of “clumpiness” of Plantago major that resided within the measured plot. A chi-squared value (X 2 ) was then calculated for each of the 3 frequency distribution graphs using the following equation.
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• Fall '12
• TA
• Standard Deviation, Orders of magnitude, Pennsylvania, Perennial plant, Plantago

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