In this study, it will be tested whether temperature affects tree densities in the genus Betula on different slopes of the Holyoke Range, specifically the north and south faces of the mountain range. My prediction is that the north face of the mountain will have a higher density of these trees than the south face of the range because of the temperature differences of the north slope being warmer than south slope for the range of growth for these trees. This experiment can be used to predict patterns of vegetation in other similar latitudes and slopes around the world. On September 20, 2000, the birch tree genus, Betula, density was measured on the north face of the Holyoke Range and on September 27, 2000, Betula's density was also measured, but on the south face of the Holyoke Range. There were eight sites laid across a 150m transect line running across the slope starting from a subjectively chosen point. Based on the data collected on the Holyoke Range, the birch trees densities were not significantly higher on the north face than on the south face of the mountain range. Eight separate t-

Fig 2. Frequency of adult Betula species on the Holyoke range

1. Elias, T. E. 1980 The Complete Trees of North America, Outdoor Life/Nature Books

On September 20, 2000, the birch tree genus, Betula, density was measured on the north face of the Holyoke Range and on September 27, 2000, Betula's density was also measured, but on the south face of the Holyoke Range. There were eight sites laid across a 150m transect line running across the slope starting from a subjectively chosen point. The replicates were formed by taking eight random sites above the transect line, and eight below; then counting each as a single replicate giving a sample size of 16. Within these eight sites, the size, density of adults and saplings of other trees along with Betula. From the transect line, two 10x10m plots were measured, one above the transect line, one below the transect line. In the upper left corner of these plots, a 4x4m plot was also measured. Within the 10x10m plots, the species and the dbh (diameter at breast height, measured at about 1.5 above ground) of each adult tree was recorded. An adult was defined as an individual that had a dbh that was greater than 10cm. For trees with multiple trunks, the dbh of each trunk was recorded separately, noted the values of these as x+y+K Also within the plot, dead trees were not counted. In the 4x4m plots the number of saplings of each tree species along with Betula was recorded. A sapling was defined as being over 1m tall and less than 10cm in dbh. Also within these plots shrubs and bushes were not included in the count.

Some common words found in the essay are:
Holyoke Range, Betula Betula, Betula Holyoke, Northern Hemisphere, Adults North, Results Mean, Frequency Betula, Harvard Forest, Carlton Lezberg, Legend Fig, holyoke range, betula lenta, basal cm2 m-2, cm2 m-2, mountain range, basal cm2, birch trees, south mountain, birch betula, * *, transect line, south mountain range, mean basal cm2, betula holyoke range, * * 02,
Approximate Word count = 1914
Approximate Pages = 8 (250 words per page double spaced)