Table S1. Factor loading, eigenvalues, the percentage of variance explained and
factor scores on the first two principal components.
Variable
Nmass
Pmass
WD
SLA
Amass
gs
KS
Al /As
tlp
50
SM
pd
Eigenvalues
% of variance
Cumulative %
ANOVA test
Decrease
Non-significant
Increase
Axis 1
0.47
0.73
-0.46
0.48
0.82
0.69
0.59
0.37
-0.46
-0.54
-0.51
0.095
3.61
30.1
30.1
Axis 1
-0.44B
-0.25AB
0.58A
Axis 2
0.47
0.20
0.045
0.45
0.091
0.089
-0.16
0.19
-0.15
0.64
0.71
-0.44
1.68
14.0
44.1
Axis 2
-0.37B
0.14A
0.29A
Note: species loadings with different trend in abundance dynamics on the first two
axes were analyzed with ANOVA. Different letters denote significant differences
among species groups displaying different temporal trends in abundance (P < 0.05).
Species abundance dynamics are: Decrease, species abundance decreased
significantly over time (n = 18 species); Non-significant, species abundance did not
change significantly (n = 10 species); Increase, species abundance increased
significantly (n = 20 species). Nmass, leaf nitrogen concentration; Pmass, leaf
phosphorus concentration; WD, sapwood density; SLA, specific leaf area; Amass,
maximum CO2 assimilation rate per unit mass; gs, stomatal conductance per unit mass;
KS, sapwood-specific hydraulic conductivity; Al /As, leaf area/sapwood area; tlp,
turgor loss point; 50, xylem tension at 50% loss of hydraulic conductivity; pd,
predawn leaf water potential; SM, stem hydraulic safety margin.
Table S2. Mean values (± SE) of functional traits for species displaying different trends in abundance dynamics.
Traits
Decrease
Non-significant
Increase
P
r2
Nmass (g g-1)
Pmass (g g-1)
SLA (cm2 g-1)
WD (g cm-3)
Amass (nmol g-1 s-1)
gs (mmol g-1 s-1)
Ks (kg m–1 s–1 MPa–1)
Al /As (m2 cm-2)
ψtlp (MPa)
ψpd (MPa)
ψ50 (MPa)
SM (MPa)
21.81 ± 1.36B
0.84 ± 0.047B
134.6 ± 7.46B
0.55 ± 0.017A
93.53 ± 7.13B
1.70 ± 0.18B
1.64 ± 0.29B
0.71 ± 0.072B
-1.7 ± 0.088B
-0.4 ± 0.038B
-2.35 ± 0.15A
1.45 ± 0.14A
18.18 ± 0.95B
0.74 ± 0.039B
157.95 ± 13.6AB
0.57 ± 0.023A
119.38 ± 14.31AB
3.02 ± 0.52A
1.77 ± 0.33B
0.71 ± 0.046AB
-1.58 ± 0.098AB
-0.25 ± 0.033A
-2.6 ± 0.39A
1.98 ± 0.4A
26.16 ± 1.33A
1.21 ± 0.069A
158.62 ± 8.28A
0.54 ± 0.024A
136.34 ± 10.52A
2.66 ± 0.27A
3.15 ± 0.43A
0.9 ± 0.076A
-1.47 ± 0.065A
-0.27 ± 0.032A
-2.25 ± 0.18A
1.59 ± 0.22A
0.001
<0.0001
0.056
0.55
0.01
0.011
0.008
0.094
0.11
0.009
0.58
0.33
0.22
0.41
0.1
0
0.15
0.15
0.16
0.06
0.053
0.15
0
0.006
Note: different letters denote significant differences among species groups displaying different temporal trends in abundance (P < 0.05):
Decrease, species abundance decreased significantly over time (n = 18 species); Non-significant, species abundance did not change significantly
(n = 10 species); Increase, species abundance increased significantly (n = 20 species).
Figure S1. Temporal trends in annual precipitation (a), total rain-free days per year
(b), soil moisture in the top 50 cm soil layer during dry season (c), annual temperature
(d), annual atmospheric CO2 concentrations (e), and nitrogen deposition (f) in
Dinghushan Biosphere Reserve monitored from 1978-2010 (with missing values in
some years). Atmospheric CO2 concentrations data were obtained from Mauna Loa
observatory, Hawaii (National Oceanic & Atmospheric Administration. Trends in
Atmospheric Carbon Dioxide Available at:
http://www.esrl.noaa.gov/gmd/ccgg/trends/).