[Woodlot Dataset 4] Comparing the DBH of adult maples to nearby maple saplings

The data was collected on Tuesday 23, 2014, at roughly 4:00 PM. The location was the Danby Woods at the York University Campus (Keele location.) At the time, it was 22°C (Source: http://www.theweathernetwork.com/monthly/canada/ontario/toronto) and it was a mildly windy day. To collect the required data, large, adult maple trees were located. The criteria for adult maple trees were that they must have a trunk circumference of at least 15 cm. Their circumference (at breast heigh) was measured using a tape measure (in cm, to a precision of 0.1cm) and recorded. The foliage coverage was also recorded by standing near the trunk of the tree, making a frame using our hands and estimating the amount of visible sky, and subtracting said number from 100 to determine foliage coverage. To maintain consistency, only I recorded the circumference at breast height.<br>Next, maple saplings near the adult were located. The distance from the adult tree to the sapling was also recorded (in cm, to a precision of 0.1cm) The criteria for saplings were that they must have a circumfrence of less than 15cm.<br>The circumference of the maple saplings were recorded (in cm.) Again, to maintain consistency, only I measured the saplings at my breast heigh.<br>A total of 10 pairs (10 adult maples and 10 maple saplings) were collected, and the data was recorded.<br>DBH was measured using the circumference collected during the experiment.<br>The following equation was used: circumference = πd, where d refers to diameter. The collected circumference was divided by π to obtain the diameter of the trunk.