Figure 2. Plot showing modeled grass heights (mean line and
95% confidence intervals) and raw data (points) for the phytometers (A)Andropogon gerardi , (B) Schizachyrium scoparium , (C)Bromus inermis , and (D) Pascopyrum smithii grown in their
home or away (Juniperus virginiana ) soils. The shaded areas
illustrate 95% confidence intervals. Modeled means and confidence
intervals are derived from the output of generalized additive models of
log10(height) as a function of the interaction between
the factors soil sterilization status and conditioning soil
type and the smoothing variables days of growth , days of
growth given the interaction of treatment factors , and the random
intercept of pot ID for each plant. Grasses grown in live or
sterile soils are indicated by red or blue coloration, respectively.
Species names within each subfigure are abbreviated as follows: A.
gerardi (ANGE), S. scoparium (SCSC), B. inermis (BRIN),P. smithii (PASM), and J. virginiana (JUVI).