Figure Legends
Figure 1. Spearman’s rank correlation between the growth
response of Bromus and Koeleria to our soil inocula.
Responses are presented as t -scores (unitless) based on the
comparison of plant growth for inoculated replicates vs. for sterile
controls.
Figure 2. Microbial guilds associated with plant growth
response to our soil inocula. In a) for prokaryotes, and in b) for
fungi, we show the number of OTUs that are beneficial (green “+”
symbols) or detrimental (red “-“ symbols) to Bromus and/orKoeleria . “0” in the left panels indicate no plant growth
response. Only bins (e.g. +,+) that had associated OTUs were included
though all were tested.
Figure 3. Redundancy analyses (RDAs) depicting the association
between OTUs and their predictors (i.e., soil properties and plant
community structure). a) and b) show RDAs for the non-indicator
prokaryotes and the indicator prokaryotes, respectively. Likewise, c)
and d) show RDAs for the non-indicator fungi the indicator fungi,
respectively. Each symbol represents a single OTU, and is colour coded
in b) and d) as a function of its impact on Bromus and/orKoeleria . Percentages on the canonical axes indicate the amount
of inertia constrained. Abbreviations:
NH4+ and
NO3- are respectively, soil
KCl-extractible ammonium and nitrates;
PO43- = Mehlich-III-extractible
phosphorus ; % Moist = gravimetric soil moisture ; Veg 1 to 5 = site
scores from the 5 principal components of the plant community ordination
(PCA on Hellinger-transformed community data).