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Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

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124<br />

The Jackknife test <strong>of</strong> variable imp<strong>or</strong>tance (Figure 4.13) revealed the environmental<br />

variable with highest gain when used in isolation is long-term maximum NDVI<br />

(max_n_a_allc), which by itself appears to have the most useful inf<strong>or</strong>mation. Minimum<br />

temperature (min_tminc), minimum temperature in the coldest month (bio_06c), and mean<br />

temperature <strong>of</strong> the driest quarter (bio_09c) had the next greatest contribution to the model<br />

when used in isolation. When elevation (va_altc) is omitted, gain is decreased the most.<br />

This indicates that elevation has the most inf<strong>or</strong>mation useful f<strong>or</strong> model development that is<br />

not present in other environmental-climatic variables. When elevation and temperature are<br />

excluded from model development, the environmental variable that decreases the gain the<br />

most when it is omitted is mean precipitation (mean_vaprecpc).<br />

124

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