RCS01 Recovery and relative influence of root, microbial, and structural properties of soil on physically sequestered carbon stocks in restored grassland at Konza Prairie

Summary

Short name: 

RCS01

Abstract: 

Managing soil to sequester C can help mitigate increasing CO2 in the atmosphere. To maximize this ecosystem service, more knowledge of factors influencing C sequestration is needed. The objectives of this study were to (i) quantify recovery of the roots, microbial biomass and composition, and soil structure across a chronosequence of grassland restorations and (ii) use a structural equation model to develop a data-based hypothesis on the relative influence of physical and biological soil properties on the soil C aggregate fraction diagnostic of sequestered C. We hypothesized measured variables would recover with restoration age. Belowground plant biomass and tissue quality (C/N ratio), soil microbial biomass C, phospholipid fatty acid (PLFA) concentrations, soil structure, and soil C stocks in the bulk soil and each aggregate fraction were quantified from a cultivated field, prairies restored for 1 to 35-yr (n = 6), and a never-cultivated (native) prairie. Root biomass, microbial biomass C, arbuscular mycorrhizal fungi (AMF) PLFA biomass across the chronosequence increase to resemble native prairie following 35 yr of restoration. Many aspects of soil structure (i.e., bulk density, proportional mass of aggre- gate fractions, and aggregate mean weighted diameter) and the distribution C among soil fractions, including C in the micro-within-macro aggregate fraction (sequestered C), also became representative of native prairie within 35 yr of restoration. Total soil C stock and physically protected C increased at a similar rate (23 and 27 g C m-2 yr-1) respectively, across the chronosequence. After 35 yr of restoration, 50% of the total C pool was physically protected. The structural equation modeling developed by these data hypothesizes that microbial biomass C and AMF biomass (microbial composition) have the strongest causal influence on physically protected C. This model needs to be tested using independent sites to achieve greater inference.

Data set ID: 

132

Data sources: 

Variables: 

DataCode
  • Label:
  • Definition: Dataset Code
  • Type: Nominal
  • Missing values: None specified
RecType
  • Label:
  • Definition: Record Type
  • Type: Nominal
  • Missing values: None specified
Age
  • Label:
  • Definition: Restoration age (number of growing seasons) of the field
  • Type: Code list
  • Codes:
    • 0 = 0 growing season
    • 1 = 1 growing season
    • 3 = 3 growing seasons
    • 7 = 7 growing seasons
    • 15 = 15 growing seasons
    • 26 = 26 growing seasons
    • 35 = 35 growing seasons
    • nat = native (never-tilled) prairie
  • Missing values: None specified
Plot
  • Label:
  • Definition: Plot number- Each field contained 4 plots
  • Type: Nominal
  • Missing values: None specified
Biomass
  • Label:
  • Definition: Belowground plant biomass, i.e. roots and rhizomes (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Quality
  • Label:
  • Definition: C:N ratio of belowground plant biomass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missing value
MBC
  • Label:
  • Definition: Microbial biomass C (μg/g soil)
  • Type: Physical quantity
  • Unit: millimolesPerGram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Surrogate
  • Label:
  • Definition: Surrogate recovery for correcting PLFA concentrations (%)
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
PLFA
  • Label:
  • Definition: Total PLFA biomass (nmol/g soil)
  • Type: Physical quantity
  • Unit: nmol/g
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
AMF
  • Label:
  • Definition: Arbuscular mycorrhizal fungi PLFA biomass (nmol/g soil)
  • Type: Physical quantity
  • Unit: nmol/g
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
FB
  • Label:
  • Definition: PLFA fungi:bacteria biomass ratio
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Comments
  • Label:
  • Definition: Comments for the data
  • Type: Nominal
  • Missing values: None specified

Variables: 

DataCode
  • Label:
  • Definition: Dataset Code
  • Type: Nominal
  • Missing values: None specified
RecType
  • Label:
  • Definition: Record Type
  • Type: Nominal
  • Missing values: None specified
Age
  • Label:
  • Definition: Restoration age (number of growing seasons) of the field
  • Type: Code list
  • Codes:
    • 0 = 0 growing season
    • 1 = 1 growing season
    • 3 = 3 growing seasons
    • 7 = 7 growing seasons
    • 15 = 15 growing seasons
    • 26 = 26 growing seasons
    • 35 = 35 growing seasons
    • nat = native (ever-tilled) prairie
  • Missing values: None specified
Plot
  • Label:
  • Definition: Plot number- Each field contained 4 plots
  • Type: Nominal
  • Missing values: None specified
pLgMacro
  • Label:
  • Definition: Percent large macroaggregates (> 200 μm) by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pSmMacro
  • Label:
  • Definition: Percent small macroaggregates (> 150-200 μm) by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pMacro
  • Label:
  • Definition: Percent combined macroaggregates (> 150 μm) by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CMacro
  • Label:
  • Definition: C stock of macroaggregates (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missing value
pCMacro
  • Label:
  • Definition: Percent total C in macroaggregates
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missing value
pMicro
  • Label:
  • Definition: Percent microaggregates (50-150 μm) by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CMicro
  • Label:
  • Definition: C stock of microaggregates (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pCMicro
  • Label:
  • Definition: Percent total C in microaggregates
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missing value
pSC
  • Label:
  • Definition: Percent silt/clay (< 50 μm) by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CSC
  • Label:
  • Definition: C stock of silt/clay (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pCSC
  • Label:
  • Definition: Percent total C in silt/clay
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missimg value
piCPOM
  • Label:
  • Definition: Percent intra-aggregate CPOM by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CiCPOM
  • Label:
  • Definition: C stock of intra-aggregate CPOM (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pCiCPOM
  • Label:
  • Definition: Percent total C in intra-aggregate CPOM
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
piSC
  • Label:
  • Definition: Percent intra-aggregate silt/clay by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CiSC
  • Label:
  • Definition: C stock of intra-aggregate silt/clay (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pCiSC
  • Label:
  • Definition: Percent total C in intra-aggregate silt/clay
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
piMicro
  • Label:
  • Definition: Percent intra-aggregate microaggregates by mass
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CiMicro
  • Label:
  • Definition: C stock of intra-aggregate microaggregates (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
pCiMicro
  • Label:
  • Definition: Percent total C in intra-aggregate microaggregates
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Comments
  • Label:
  • Definition: Comments
  • Type: Nominal
  • Missing values: None specified

Variables: 

DataCode
  • Label:
  • Definition: Dataset Code
  • Type: Nominal
  • Missing values: None specified
RecType
  • Label:
  • Definition: Record Type
  • Type: Nominal
  • Missing values: None specified
Age
  • Label:
  • Definition: Restoration age (number of growing seasons) of the field
  • Type: Code list
  • Codes:
    • 0 = 0 growing season
    • 1 = 1 growing season
    • 3 = 3 growing seasons
    • 7 = 7 growing seasons
    • 15 = 15 growing seasons
    • 26 = 26 growing seasons
    • 35 = 35 growing seasons
    • nat = native (never-tilled) prairie
  • Missing values: None specified
Plot
  • Label:
  • Definition: Plot number - Each field contained 4 plots
  • Type: Nominal
  • Missing values: None specified
iCPOMQual
  • Label:
  • Definition: C:N ratio of intra-aggregate CPOM
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
MWD
  • Label:
  • Definition: Aggregate mean-weight diameter (cm)
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
BD
  • Label:
  • Definition: Soil bulk density (g/m3)
  • Type: Physical quantity
  • Unit: gramsPerCubicMeter(g/m3)
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CTotal
  • Label:
  • Definition: Total C of whole soil (g/m2)
  • Type: Physical quantity
  • Unit: gramsPerSquareMeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • 1 = missing value
Comments
  • Label:
  • Definition: Comments about data
  • Type: Nominal
  • Missing values: None specified

Categories
Dates

Date Range: 

Thursday, August 1, 2013 to Tuesday, January 31, 2017

Publication Date: 

Saturday, August 25, 2018
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