Forest Ecology Lab Report

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The Difference in Forest Ecology Between Uplands and Lowlands Sean McGraw, Exeter High School, Exeter, NH Abstract: In this study, it was examined whether or not Uplands and Lowlands had any effect on a trees’ DBH (Diameter at Breast Height). The hypothesis stated that if trees are grown in a lowland area, then there will be less types of trees with a substantial DBH (5 in. or more.) than if they were grown in an upland area. To test this, the DBH of 10 different species of trees was collected from four different lowland areas, and four different upland areas. The DBHs of each species of tree, collected from all four lowland locations was then averaged, and graphed. The product was a clear representation of the DBHs of each tree in the lowland area. The same process was carried out for the Uplands. When the graphs were compared, it was shown that the number of types of trees with a substantial DBH in uplands and lowlands were very similar. To confirm these results, a Chi-Square operation of the collected data was carried out. The result of the operation showed that there was no real difference between Upland DBHs and Lowland DBHs. Introduction: An essential term used in this study was DBH, or Diameter at Breast Height. This is a measurement calculated from finding the circumference of a tree at breast height, then finding the tree. Not only does DBH relate to a tree’s diameter, but it can be used to help determine age. This study was conducted in a forest on Exeter High School grounds. This land is currently used for walking trails. Foxes, Mice, and other animals call this place home. It is unknown what this land was used for, besides just being a forest, in the past. Our first test was done in an upland, or elevated, location in that forest. Our next test was done in a lowland location. Both tests were conducted on a sunny, mild day, with little wind.

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