Notes

A.
1. According to the graph the percentage of cover that was sedges and grasses in the unburned plot is approximately 15-17%
2. When comparing the unburned plot to the plot burned most recently (2 years ago). The unburned plot has no present Dead vegetation in the graph. However the plot that was burnt most recently contains about 45% dead vegetation.
3. According to the researchers hypothesis the sedges and grasses will dominate the land scape in later succession stages. I would support and agree with this hypothesis due to the evidence presented in the graph. This because when comparing all the types of vegetation, the sedges and grasses have shown the most consistent growth and persistence over the time period. Comparing the other vegetation they are not as consistent as the sedges and grasses. In fact, most have very fluctuating growth inclines and declines unlike the sedges and grasses.

B.
1. The control group of the stud would be the unburned plots since it is the mode of comparison for the other variables or time period successions. Additionally, the unburned plots have not been burnt making them a good comparison point.

2. If the plot has been burnt the longer time passes from the last fire then we will have increasing thaw depth and increasing average surface organic thickness (both in Cm) over time.

3. There is a direct correlation or relationship between the average thaw depth and average surface organic thickness. Overtime in the graph we can see that both factors have increased as time goes on.

C.
One of the main tests that scientists can conduct to test the quality of the soil is a Ph test which can determine the Ph value and either the acidity or the alkalinity of the soil. Secondly, scientists can conduct a moisture content test for the soil. Both are good tests in addition the current soil testing methods.