Relationships between Plant Biodiversity and Soil Fertility in a Mature Tropical Forest, Costa Rica
Table 3
ANOVA results () and correlation coefficient () of the different regressions with value ≤ 0.10.
Statistical
Regressions of the different relationships that were significant ( value ≤ 0.05 in bold) or close to be significant ( value ≤ 0.10)
parameters
K TSR
K HStR
Ca TSR
Mg TSR
P TSR
P HStR
P HStD
Fe TStR
Fe HStD
Zn SStD
Al TWSD
value
0.04
0.08
0.05
0.054
0.047
0.01
0.09
0.06
0.06
0.08
0.07
−0.69
0.61
−0.67
−0.66
−0.67
0.78
0.59
0.65
0.65
−0.61
−0.64
Statistical
Regressions of the different relationships that were significant ( value ≤ 0.05 in bold) or close to be significant ( value ≤ 0.10)
parameters
Mn HStR
Mn HStD
CEC TSR
C/N TWSD
C/N HStR
C/N SStR
N TWSD
SFI TSR
SFI HStR
pH TStR
value
0.07
0.04
0.03
0.01
0.09
0.10
0.07
0.01
0.04
0.06
0.63
0.69
−0.72
0.78
−0.60
−0.59
−0.63
−0.78
0.68
0.65
TSR: tree species richness; HStR: herb structural richness; HStD: herb structural diversity; TStR: tree structural richness; HStD: herb structural diversity; SStD: shrub structural diversity; CEC: cation exchange capacity; C/N: C/N ratio; TWSD: tree Shannon-Wiener species diversity; SStR: shrub structural richness; TStR: tree structural richness; N: total nitrogen in organic matter; SFI: soil fertility index.
