forests on different soils would be the abundance measure of the densities of each species on different soils. This would be the best choice because one would be able to tell which species are outcompeting other species on that particular soil. For example, Hemlock is the densest in College Woods on the certain soil that is out there, this was determined through the abundance of measure of the densities of each type of species present in College Woods. In a different location where there is a different type of soil, Hemlock may not be the densest species, in order to find this out an abundance measure of densities of each species at the new location must be made to see which is denser.2.c.iv.The abundance measure to use when estimating the amount of habitat available for a warbler that nest and forages in the crowns of white pine trees would be the abundance measure of the dominance of white pines. The dominance should be found rather then the density because if the warbler uses the tree to nest and forge in, then the tree needs to be beyond its juvenile stage and have established itself. If we were to measure the density of white pine, that would also count smaller trees that are of no use to the warbler. 3.In this exercise we assume diameter at breast height (DBH) is a good indicator of tree age. This assumption may be false, because DBH doesn’t have to directly relate to age. Some species grow in diameter faster then they grow in height. Also some species grow rapidly in diameter while they’re juveniles and then stop growing in diameter and start growing in height, or vise versa. There isn’t one set speed that a tree grows in diameter that could possibly make it a reliable method of determining age. In most cases a larger diameter does mean an older tree. But not in all cases and not when trying to determine juveniles from adults or middle-aged trees.4.a.To determine if a species is increasing there must be a high ...
