Appendix F. Principal-components analysis results. Analysis of number of occurrences of indicator species in five groups. Data are from records of the indicator species in the 942 Michigan townships that had at least one occurrence of a potential indicator, as recorded in the Michigan Natural Heritage database as of June 2003.
Eigenvalues |
|||||
Eigenvalue |
Difference |
Proportion |
Cumulative |
||
1 |
2.124 |
0.517 |
0.425 |
0.425 |
|
2 |
1.608 |
0.980 |
0.321 |
0.746 |
|
3 |
0.628 |
0.114 |
0.125 |
0.872 |
|
4 |
0.514 |
0.387 |
0.102 |
0.975 |
|
5 |
0.126 |
0.025 |
1.00 |
||
Eigenvectors |
|||||
PC1 |
PC2 |
PC3 |
PC4 |
PC5 |
|
Criterion |
|||||
Pooled |
0.620 |
0.084 |
-0.420 |
-0.126 |
-0.645 |
Wetland |
0.287 |
0.607 |
-0.217 |
0.598 |
0.380 |
Forest |
0.277 |
0.554 |
0.527 |
-0.572 |
0.107 |
Natural areas |
0.443 |
-0.342 |
0.667 |
0.470 |
-0.146 |
Communities |
0.510 |
-0.447 |
-0.231 |
-0.280 |
0.638 |