n figure three and four, dealing with the black birch, the ranges are significantly smaller, absolute density (0-7), absolute dominance (0-0.212) and relative density (0-31.25), resulting in larger r-squared values of 0.609(figure three) and 0.697(figure four). When the ranges are small there is less space for the measurements to be spread out. The smaller range results in similar measurements and less room for variation, resulting in a tighter fit line and greater R-squared value.2.c.i.The abundance measurement to use when estimating the success of Hemlock seedling establishment and survival in a forest would be the abundance measure of dominance of hemlocks present. This measurement would support that the original hemlock seedling had survived through its juvenile stage and established a supporting location where nutrients and other life supporting resources are available for the hemlocks to continue to survive and thrive throughout adulthood. Dominance would be used in contrast with density, because we want to measure how well the seedlings have established themselves, so you would want to look at the adult/developed hemlocks, because these are the ones that have been able to establish themselves and survive.2.c.ii.The abundance measure to use when estimating the amount of useable wood fiber in a managed forest would be the abundance measure of dominance also, because we are looking for trees with high DBH’s (diameter at breast height). This would be the appropriate measure because useable wood fiber depends on the diameter of the tree rather then the number of stems per unit area, as with density. Trees with a large DBH would be suitable for wood fiber, be able to be made into lumber. Trees with small DBH would be useless, as wood fiber because the lumber it is to be made into would be too small to be used as lumber.2.c.iii.The abundance measurement to use when assessing possible competitive relationships among tree species in...
