Fig.6 Coefficients of standardized total effect (direct plus
indirect effect) of each variable on plant (a) abundance and (b) species
diversity in shrubland, (c) abundance and (d) species diversity in shrub
layer of woodland, (e) abundance and (f) species diversity in tree layer
of woodland derived from structural equation model (SEMs). All
environment variables in the above figures are significant
(P <0.05). For abbreviations, see Material and Methods
and Table 2.