Ecological Archives A025-076-A1
Jared J. Beck, Daniel L. Hernández, Jae R. Pasari, and Erika S. Zavaleta. 2015. Grazing maintains native plant diversity and promotes community stability in an annual grassland. Ecological Applications 25:1259–1270. http://dx.doi.org/10.1890/14-1093.1
Appendix A. ANCOVA results for the relationship between native species richness and both exotic cover and grazing treatment.
Table A1. ANCOVA results for models describing the relationship between native species richness and both exotic cover and grazing treatment. Native plant richness was natural log transformed. Fertilized and unfertilized subplots were analyzed separately. We report the regression coefficient (β), F statistic, and P value for each of the parameters as well as the R² of the full ANCOVA model.
Year |
Fertilized |
|
Unfertilized |
||||||
|
R² |
β |
Fa |
P |
|
R² |
β |
Fa |
P |
2008 |
|
|
|
|
|
|
|
|
|
|
0.44 |
0.006 |
0.177 |
0.688 |
|
0.04 |
-0.001 |
0.127 |
0.734 |
|
|
0.602 |
3.008 |
0.134 |
|
|
-0.029 |
0.093 |
0.770 |
|
|
-0.010 |
1.526 |
0.263 |
|
|
-0.001 |
0.002 |
0.964 |
2009 |
|
|
|
|
|
|
|
|
|
|
0.08 |
0.006 |
0.203 |
0.668 |
|
0.06 |
-0.006 |
0.362 |
0.570 |
|
|
0.0124 |
0.020 |
0.893 |
|
|
-0.048 |
0.002 |
0.968 |
|
|
-0.006 |
0.303 |
0.602 |
|
|
0.003 |
0.025 |
0.880 |
2010 |
|
|
|
|
|
|
|
|
|
|
0.29 |
-0.006 |
6.013 |
0.026 |
|
0.34 |
-0.005 |
7.708 |
0.013 |
|
|
0.159 |
0.331 |
0.573 |
|
|
0.021 |
0.121 |
0.733 |
|
|
-0.003 |
0.231 |
0.637 |
|
|
-0.003 |
0.549 |
0.470 |
2011 |
|
|
|
|
|
|
|
|
|
|
0.09 |
-0.009 |
0.698 |
0.416 |
|
0.39 |
-0.009 |
8.936 |
0.009 |
|
|
-0.453 |
0.354 |
0.560 |
|
|
0.303 |
0.810 |
0.382 |
|
|
0.009 |
0.516 |
0.483 |
|
|
-0.004 |
0.409 |
0.532 |
2012 |
|
|
|
|
|
|
|
|
|
|
0.33 |
-0.010 |
4.639 |
0.047 |
|
0.01 |
-0.001 |
0.055 |
0.818 |
|
|
-0.107 |
2.740 |
0.117 |
|
|
-0.056 |
0.141 |
0.713 |
|
|
-0.012 |
0.666 |
0.426 |
|
|
-0.001 |
0.011 |
0.920 |
2013 |
|
|
|
|
|
|
|
|
|
|
0.33 |
-0.009 |
7.100 |
0.016 |
|
0.27b |
-0.012 |
5.468 |
0.034 |
|
|
-0.164 |
0.899 |
0.357 |
|
|
-0.091 |
0.013 |
0.910 |
|
|
0.001 |
0.006 |
0.939 |
|
|
0.004 |
0.162 |
0.693 |
a F1,6 for 2008 and 2009, F1,16 for 2010–2013.
b Outlier identified and removed from model (F1,15), exotic cover was not significant with outlier.