DOI: 10.6084/m9.figshare.3846792.v1
title: Ecology Lab 2 danby woodlot dataset #4.xlsx

description: Meta dataTree number – 10 pairs of trees were randomly selected, as long as they belonged to the maple tree family. Diameter at Breast height (DBH) in meters (m) – Adult trees diameter were measured using a transect tape. The height of which the diameter was taken was approximately breast height. The measurements were taken to the accuracy of the transect tape which was to the hundredth meter. The reading on the tape was recorded via sight of the sampler. Adult maple trees were classified to having a minimum diameter of at least 0.20 meters. Height of which the diameter was measured is at 1.30mCanopy Coverage in percentage (%) – The percentage of which the leaves covered the skies was measured by using the samples hands to create a box and determine how much of the sky was visible. This is pure estimation based; on how many maple leaves from the adult tree covered the skies. Any leaves from other trees that were in the created box were neglected. All adult trees had maple leaves, no tree was leafless. Distance to Sapling in Meters (m) – The distance from adult maple trees to sapling trees were taken from breast height to breast height in meters, closest to the hundredth meter. Sapling trees were classified as any maple tree that was less than 0.20 meters in diameter. Saplings of the adult maple tree were chosen by random, as long as the sapling fit the diameter classification and were maple trees. Only maple sapling trees were included. Diameter at Breast Height of Sapling tree in meters – Maple sapling trees DBH were measured using transect tape. Readings were recorded by the sight of the sampler, closest to hundredth of a meter. Sapling trees were classified as being under 0.20 meters in diameter. Height of which the diameter was measured is 1.30m Site Description: Danby Woodlot, York University Keele campus. Approximately 20 students and 1 teaching assistant were in the woodlot. There was barely any wind for the duration of the sampling from times 2:30 pm to 4:30 pm. Sun was not easily visible due to the canopy of all the trees in the woodlot; temperature was approximately 30 degrees Celsius. The woodlot had numerous species of trees, lots of insects and lots of branches on the ground. Methods: 10 pairs of randomly selected subjects were chosen only if they belong to the maple tree family. Pairs were chosen based on one being adult the other being a sapling. By using transect tape we were able to measure the diameter and distance of adult and sapling maple trees closest to the hundredth meter. Measurements must be taken at approximately breast height which was set at 1.30m from the ground. Maples trees had to be classified; adult maple trees as above 0.20 m in diameter and sapling maple trees as less than 0.20 m. Canopy coverage was determined by making a rectangle with the fingers and approximating the amount of coverage that the leaves would occupy in the rectangle. Hypothesis: The prediction for this data set was that adult maple trees with a greater DBH would yield a greater canopy coverage percentage because bigger diameter trees would be taller than the smaller ones, thus creating more leaves for coverage. We predict that the greater the distance the sapling tree is from the adult tree the greater the diameter will be because the further away the sapling tree is, the more light the sapling tree will receive due to the lack of coverage from the adult tree. <br> <br>