396
Fig. 13.8 The area of reference and B. tectorum-invaded vegetation classes (ha) in the A. triden-
tata spp. wyomingensis ecological system assuming climate change for the A2 scenario from five
Global Circulation Models. Legend: WS-A = early-succession; WS-B = mid-succession;
WS-AG = annual grassland; WS-SAP = shrubland with annual and perennial grasses; and
WS-TEA = tree encroached or wooded shrubland invaded by annual grass. Climate change GCMs
replicates are mri_cgcm2_3_2a.2.sresa2, ukmo_hadcm3.1.sresa2, ncarpcm1.1.sresa2, ncar
ccsm3_0.1.sresa2, and ncar_ccsm3_0.2.sresa2. Error bar represents the 95 % confidence interval
for five replications
WS-A to WS-B and from WS-SAP to WS-TEA) and invasion of uninvaded class by
B. tectorum (from WS-B to WS-SAP; Fig. 13.8).
Three lessons learned from simulating A. tridentata spp. vaseyana and A. tri-
dentata spp. wyomingensis community transitions were that (1) it may take
L. Provencher et al.