Ecological Archives E096-084-A2
Lucía Vivanco, Irina C. Irvine, and Jennifer B. H. Martiny. 2015. Nonlinear responses in salt marsh functioning to increased nitrogen addition. Ecology 96:936–947. http://dx.doi.org/10.1890/13-1983.1
Appendix B. Detailed description of the principal component analysis of biogeochemical variables that describe baseline conditions among three Californian salt marshes and a table showing the eigenvector scores of 12 biogeochemical variables in three main PCA axes in control plots at 7 months of fertilization.
Table B1. Eigenvector scores of 13 biogeochemical variables in three main PCA axes in control plots at 7 months of fertilization. The highest eigenvector scores for each PCA axis are indicated in bold. Values in parentheses indicate variance accounted for by each axis. See associated Fig. 1.
|
PCA 1 |
PCA 2 |
PCA 3 |
|
(24.5%) |
(21.9%) |
(17%) |
Plant characteristics |
|
|
|
|
0.080 |
-0.035 |
0.353 |
|
0.148 |
0.143 |
-0.559 |
|
0.233 |
0.288 |
-0.382 |
Microbial processes |
|
|
|
|
0.056 |
0.279 |
0.376 |
|
0.460 |
-0.213 |
0.017 |
|
0.357 |
-0.011 |
0.197 |
|
0.074 |
0.453 |
0.257 |
|
-0.132 |
-0.040 |
-0.390 |
Sediment characteristics |
|
|
|
|
0.420 |
0.206 |
-0.011 |
|
0.392 |
0.263 |
-0.005 |
|
-0.344 |
0.065 |
0.061 |
|
0.180 |
-0.527 |
0.103 |
|
-0.267 |
0.415 |
0.061 |