Table 5.  Factor loadings from principle components analysis (PCA) greater than 0.7 for land-use variables and proportion of variation explained by each principal component

Land-use and
population variable
First principal
component
Second principal
component
Third principal
component
Percent agricultural
0.929
Percent forest
 –.914
Percent urban
0.869
Population density
  .846
Percent rangeland
–0.725
Percent wetland
    .719

Proportion of variation explained
  .316
  .258
    .148
Proportion of total variation explained
    .722

 

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