Table Captions
Table S1. The relative
abundance of Prokaryote and fungi at phylum level under different water
table treatments in short-term and long-term drainage peatlands.
Table S2. The average GHG emission rate and temperature
sensitivity (Q10) of three different water table
treatments in short- and long-term drainage peatlands under 8 °C and 18
°C.
Table S3. Soil DOC and TDN concentration variations under
different water table (WT) treatments in short-term and long-term
drainage peatlands.
Table S4. Data on soil and plant properties in short-term and
long-term drained peatlands.
Figure captions
Figure 1. Map of sampling site (Ruokeba) in Zoige
Plateau peatland
Figure 2. The compositions and structures of prokaryotic (a,c)
and fungal (b,d) in peatlands with different drainage age and
water table levels. S: Short-term drainage sites, L: Long-term drainage
sites, S2 and L2: low water table treatment (LWT), S10 and L10:
intermediate water table treatment (IWT), S50 and L50: high water table
treatment (HWT).
Figure 3. Microbial biomarkers and predicted functional profiles
of prokaryote with
differen water table levels. (a) Top 14 prokaryotic families were
identified by using random-forest classification of the relative
abundance of prokaryote with different water table levels. (b) Heatmap
of the relative abundance of biomarker families in the individual
samples. (c) The differeces prokaryotic function in the FaProTax
database for different water table treatments. S: Short-term drainage
site, L: Long-term drainage site, S2 and L2: low water table treatment
(LWT), S10 and L10: intermediate water table treatment (IWT), S50 and
L50: high water table treatment (HWT).
Figure 4. The average GHG emission rate during 35d incubation in
short- and long-term drainage peatlands with three different water table
treatments under 8 °C and 18 °C. (a) CO2 emissions; (b)
CH4 emissions; (c) N2O emissions.
Significance level: *p< 0.05, **p < 0.01, or ***p< 0.001. S: Short-term drainage site, L: Long-term drainage
site, S2 and L2: low water table treatment (LWT), S10 and L10:
intermediate water table treatment (IWT), S50 and L50: high water table
treatment (HWT).
Figure 5. Variation of DOC (a) and TDN (b) concentration of
three different water table treatments in short- and long-term drainage
peatlands under 8 °C and 18 °C.Significance level: *p < 0.05, **p <
0.01, or ***p < 0.001. S: Short-term drainage site, L:
Long-term drainage site, S2 and L2: low water table treatment (LWT), S10
and L10: intermediate water table treatment (IWT), S50 and L50: high
water table treatment (HWT).
Figure 6.Relationship between the
average GHG emission and DOC(a, c, e) and TDN
concentration (b, d, f). Grey circle
represents
at 8 °C, and red circle represents at 18 °C.
Figure 7. Spearman’s correlation analysis between the dominant
microbial phyla and GHG emissions, DOCconcentration and TDN
concentration. Grey font indicates fungal phyla, and black font
indicates prokaryotic phyla. Significance level: *p <
0.05, **p < 0.01, or ***p < 0.001.
Figure 8. The impacts of water table, drainage age, soil
properties and soil prokaryotic and fungal communities on GHG emissions
as estimated using the structural equation modeling.( a) CO2emissions; (b) CH4 emissions; (c) N2O
emissions. Standardized path coefficients are listed beside each path
(Red and blue arrows represent positive and negative
relationships, black double arrows
represent covariant correlation; Paths with insignificant coefficients
are represented using gray lines; *p < 0.05, **p< 0.01, or ***p < 0.001).
R2 values indicate the strength of explanation by
independent variables. The prokaryotic and fungal diversities are
represented using Shannon indexes, and the prokaryotic and fungal
communities are represented using NMDS of the Bray-Curtis distance
matrix.
Figure S1. Water table data at different distances from
short- and long-term drainage ditches in recent three growing
seasons (2016-2018). (a) The fluctuation of water table depth (WTD);
(b) Average water table depths. S: Short-term drainage peatlands, L:
Long-term drainage peatlands, S2 and L2: low water table treatment
(LWT), S10 and L10: intermediate water table treatment (IWT), S50 and
L50: high water table treatment (HWT).
Figure S2. Variation of GHG emission rate of soil from three
different water table treatments in short- and long-term drainage
peatlands under 8 °C and
18 °C.(a)
CO2 emission
rate at 8°C; (b)
CH\sout4 emission rate at 8°C; (c) N2O
emission rate at 8°C; (d) CO2 emission rate at 18°C; (e)
CH4 emission rate at 18°C; (f) N2O
emission rate at 18°C.
Figure S3. Temperature sensitivity (Q10) value
variations from three different water table treatments in short- and
long-term drainage peatlands. (a) CO2; (b)
CH4; (c) N2O. Significance level:
*p < 0.05, **p < 0.01, or ***p< 0.001. S: Short-term drainage site, L: Long-term drainage
site, S2 and L2: low water table treatment (LWT), S10 and L10:
intermediate water table treatment (IWT), S50 and L50: high water table
treatment (HWT).
Figure S4. Spearman’s correlation analysis between GHG emissions
and soil properties, soil
prokaryotic and fungal communities. Significance level: *p< 0.05, **p < 0.01, or ***p< 0.001.