Elevational Patterns of Plant Richness in the Taibai Mountain, China
Table 2
Coefficients of determination () between species richness and explanatory variables for each plant group in simple linear regression analysis; standard coefficients (beta) for each variable and model fit () in stepwise multiple regression.
Plant groups
Variable
individual
Beta model A
Beta model B
Overall plants
Ln(area)
0.54***
(·)
(·)
MDE
0.45***
−0.81*
—
MAT
0.24**
(·)
0.26*
MAP
0.65***
1.57***
0.72***
Model fit ()
0.72***
0.71***
Seed plants
Ln(area)
0.46***
(·)
(·)
MDE
0.36***
−0.94*
—
MAT
0.26**
(·)
0.30*
MAP
0.55***
1.63***
0.65***
Model fit ()
0.65***
0.63***
Bryophyte
Ln(area)
0.82***
(·)
(·)
MDE
0.95***
0.98***
—
MAT
0.01
0.11**
−0.22***
MAP
0.92***
(·)
1.03***
Model fit ()
0.96***
0.96***
Fern
Ln(area)
0.37***
(·)
(·)
MDE
0.22*
(·)
—
MAT
0.60***
0.61***
0.61***
MAP
0.49***
0.50***
0.50***
Model fit ()
0.82***
0.82***
Model A includes all variables; model B includes all variables except the MDE. (·) = variable excluded from analysis (-significance > 0.1); — = variable not incorporated in model; *, **, and ***.
