Skip to main content
. 2014 Mar 7;9(3):e91155. doi: 10.1371/journal.pone.0091155

Table 1. Results of linear mixed models testing effects of deer exclosure and year on measures of plant community structure from the soil seed bank and aboveground vegetation.

Response Deer exclusion P Year P
Seed Bank Germinants
Seedling richness 3.706 0.054 143.58 <0.001
Seedling diversity (Shannon-Wiener index) 10.244 0.001 42.647 <0.001
Total germinants 5.234 0.022 81.972 <0.001
Relative abundance annuals and biennials 17.863 <0.001 23.988 0.002
Proportion native species germinated 4.679 0.031 55.309 <0.001
Proportion native germinants 4.784 0.029 42.948 <0.001
Aboveground Vegetation
Aboveground species richness 0.323 0.570 48.922 <0.001
Aboveground diversity (Shannon-Wiener index) 1.088 0.297 25.617 <0.001
Aboveground cover 0.027 0.870 40.953 <0.001
Relative cover of annuals and biennials 0.013 0.911 7.258 0.064
Woody stems 17.731 0.035 3.678 0.597
Proportion native species 11.046 <0.001 65.777 <0.001
Proportion native cover 0.874 0.350 27.216 <0.001

The year-by-deer exclusion interaction was never significant and subsequently dropped from all models; df  = 5 for germinant models and df  = 3 for aboveground vegetation models. Initial values shown are χ 2 values for likelihood tests excluding treatment of interest. Bold values denote statistical significance at P≤0.05.