U.S. Department of EnergyOffice of Scientific and Technical Information
Data for: Spatial access and resource limitations control carbon mineralization in soils
Abstract
This dataset contains data and code used for the paper "Spatial access and resource limitations control carbon mineralization in soils", https://doi.org/10.1016/j.soilbio.2021.108427. Core-scale soil carbon fluxes are ultimately regulated by pore-scale dynamics of substrate availability and microbial access. These are constrained by physicochemical and biochemical phenomena (e.g. spatial access and hydrologic connectivity, physical occlusion, adsorption-desorption with mineral surfaces, nutrient and resource limitations). We conducted an experiment to determine how spatial access and resource limitations influence core-scale water-soluble soil organic matter (SOM) mineralization, and how these are regulated by antecedent moisture conditions. Intact soil cores were incubated at field-moist vs. drought conditions, after which they were saturated from above (to simulate precipitation) or below (to simulate groundwater recharge). Soluble carbon (acetate) and nitrogen (nitrate) forms were added to some cores during the rewetting process to alleviate potential nutrient limitations. Soil respiration was measured during the incubation, after which pore water was extracted from the saturated soils and analyzed for water soluble organic carbon concentrations and characterization. Our results showed that carbon (C) amendments increased the cumulative carbon dioxide (CO2) evolved from the soil cores, suggesting that the soils were C-limited. Drought and rewetting increased soil respiration, and there was a greater abundancemore »
- Contributors:
Related Person:
- Publication Date:
- Research Org.:
- Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States); Soil Carbon Biogeochemistry
- Sponsoring Org.:
- U.S. DOE > Office of Science > Biological and Environmental Research (BER)
- Subject:
- 54 ENVIRONMENTAL SCIENCES
- Keywords:
- drought; water soluble organic carbon; pore water; carbon protection; respiration; spatial access; mesocosm; nutrient limitations; soil organic matter; carbon; nitrogen; EARTH SCIENCE > LAND SURFACE > SOILS; FT-ICR-MS; EARTH SCIENCE > LAND SURFACE > SOILS > SOIL RESPIRATION; EARTH SCIENCE > LAND SURFACE > SOILS > CARBON
- Geolocation:
- 28.105,-81.419|28.105,-81.419|28.105,-81.419|28.105,-81.419|28.105,-81.419
- OSTI Identifier:
- 1821491
- DOI:
- https://doi.org/10.15485/1821491
- Project Location:
-
Citation Formats
Patel, Kaizad, Smith, A. Peyton, Bond-Lamberty, Ben, Fansler, Sarah, Tfaily, Malak, Bramer, Lisa, Varga, Tamas, and Bailey, Vanessa. Data for: Spatial access and resource limitations control carbon mineralization in soils. United States: N. p., 2021.
Web. doi:10.15485/1821491.
Patel, Kaizad, Smith, A. Peyton, Bond-Lamberty, Ben, Fansler, Sarah, Tfaily, Malak, Bramer, Lisa, Varga, Tamas, & Bailey, Vanessa. Data for: Spatial access and resource limitations control carbon mineralization in soils. United States. doi:https://doi.org/10.15485/1821491
Patel, Kaizad, Smith, A. Peyton, Bond-Lamberty, Ben, Fansler, Sarah, Tfaily, Malak, Bramer, Lisa, Varga, Tamas, and Bailey, Vanessa. 2021.
"Data for: Spatial access and resource limitations control carbon mineralization in soils". United States. doi:https://doi.org/10.15485/1821491. https://www.osti.gov/servlets/purl/1821491. Pub date:Fri Jan 01 00:00:00 EST 2021
@article{osti_1821491,
title = {Data for: Spatial access and resource limitations control carbon mineralization in soils},
author = {Patel, Kaizad and Smith, A. Peyton and Bond-Lamberty, Ben and Fansler, Sarah and Tfaily, Malak and Bramer, Lisa and Varga, Tamas and Bailey, Vanessa},
abstractNote = {This dataset contains data and code used for the paper "Spatial access and resource limitations control carbon mineralization in soils", https://doi.org/10.1016/j.soilbio.2021.108427. Core-scale soil carbon fluxes are ultimately regulated by pore-scale dynamics of substrate availability and microbial access. These are constrained by physicochemical and biochemical phenomena (e.g. spatial access and hydrologic connectivity, physical occlusion, adsorption-desorption with mineral surfaces, nutrient and resource limitations). We conducted an experiment to determine how spatial access and resource limitations influence core-scale water-soluble soil organic matter (SOM) mineralization, and how these are regulated by antecedent moisture conditions. Intact soil cores were incubated at field-moist vs. drought conditions, after which they were saturated from above (to simulate precipitation) or below (to simulate groundwater recharge). Soluble carbon (acetate) and nitrogen (nitrate) forms were added to some cores during the rewetting process to alleviate potential nutrient limitations. Soil respiration was measured during the incubation, after which pore water was extracted from the saturated soils and analyzed for water soluble organic carbon concentrations and characterization. Our results showed that carbon (C) amendments increased the cumulative carbon dioxide (CO2) evolved from the soil cores, suggesting that the soils were C-limited. Drought and rewetting increased soil respiration, and there was a greater abundance of complex aromatic molecules in pore waters sampled from these soils. This newly available substrate appeared to alleviate nutrient limitations on respiration, because there were no further respiration increases with subsequent C and N amendments. We had hypothesized that respiration would be influenced by wetting direction, as simulated precipitation would mobilize C from the surface. However, as a main effect, this response was seen only in the C-amended soils, indicating that surface-C may not have been bioavailable. At the pore scale (pore water samples), drought and the C, N amendments caused a net loss of identified molecules when the soils were rewet from below, whereas wetting from above caused a net increase in identified molecules, suggesting that fresh inputs stimulated the C-and N-limited microbial populations present deeper in the soil profile. Our experiment highlights the complex and interactive role of antecedent moisture conditions, wetting direction, and resource limitations in driving core-scale C fluxes.This dataset contains a compressed (.zip) archive of the data and R scripts used for this manuscript. The dataset includes files in .csv format, which can be accessed and processed using MS Excel or R. This archive can also be accessed on GitHub at https://github.com/kaizadp/TES_spatial_access_2021 (DOI: 10.5281/zenodo.5522938).},
doi = {10.15485/1821491},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {1}
}