Summary & Purpose
Dryland ecosystems are experiencing more variability and extremes in rainfall and disproportionate shifts in plant community composition, both likely to alter soil carbon (C) cycling and storage. Although most studies focus on changes in soil organic C (SOC) pools, inorganic C (SIC) pools in drylands are susceptible to disturbances and may represent an important sink. We report changes in soil organic carbon (SOC) and inorganic carbon (SIC) isotopic values in the top 1 m of soil profiles following ~20 years of experimental manipulation of water availability and vegetation within a cold-desert ecosystem. The changes in C isotopic values correspond to reported changes in SOC and SIC pools relative to ambient controls. We used a split plot design (n = 3) contrasting vegetation types (split plot), either native Artemisia tridentata spp. tridentata (big sagebrush) communities or monocultures of Agropyron cristatum (crested wheatgrass), a non-native bunchgrass, in manipulations of spring/fall (DORM) or summer (GROW) water availability (whole-plot) all stratified by under-plant vs. inter-plant patch microsite. Despite increases in pedogenic SIC pools in inter-plant patches, under crested wheatgrass in DORM treatments, and under sagebrush in GROW treatments, we detected little corresponding change in SIC-δ13C or δ18O values. Average SIC-δ13C or δ18O values were -4.12 and -13.10‰, respectively, and suggest a mixture of atmospheric and respired carbon dioxide (CO2) sources and groundwater HCO3-. Both SIC and SOC-δ13C values were more depleted in GROW treatments (∆13C = -0.10 and -0.5‰ respectively), while SIC-δ18O values were more enriched (∆18O = 0.02‰). SIC-δ13C profiles became more enriched in surface horizons and deleted at depth relative to ambient. SIC- δ18O values were enriched in surface horizons under crested wheatgrass but not sagebrush. We conclude that both change in the timing and availability of water, and vegetation can change SIC storage and potentially the relative mixture of C sources. However, suitable methods for assessing SIC-C sources with changing storage in native soils are lacking and limit our understanding of SIC in the changing global C budget. Further methodological development is required along with long-term experimental manipulations geared for testing the role of SIC in C sequestration on human timescales.
Date of Publication or Submission
This study was conducted in collaboration and cooperation with the US Geological Survey, Forest and Rangeland Ecosystem Science Center, Boise, Idaho, the US Department of Agriculture-Agricultural Research Service, Northwest Watershed Research Center, Boise, Idaho, and Stoller Newport News Nuclear, Idaho Falls, Idaho, USA with permission from the Idaho National Laboratory. Support for this research was provided in part by a grant from the Idaho State University College of Science & Engineering, a Geological Society of America Graduate Student Research Grant (#9961-12), Idaho EPSCoR RII via NSF EPS-0814387, and Reynolds Creek CZO Cooperative agreement NSF EAR-1331872 (Kathleen Lohse, Principal Investigator; Nancy Glenn, Co-Principal Investigator; Alejandro Flores, Co-Principal Investigator; Shawn Benner, Co-Principal Investigator; Mark Seyfried, Co-Principal Investigator). Data are available at the criticalzone.org data portal. Every sample associate with the Idaho National Laboratory Ecohydrological Experiment is registered with an International Geo Sample Number through System for Earth Sample Registration (SESAR).
Single Dataset or Series?
.xlsx, .cvs, .txt
Privacy and Confidentiality Statement
Boise State is explicitly compliant with federal and state laws surrounding data privacy including the protection of personal financial information through the Gramm-Leach-Bliley Act, personal medical information through HIPAA, HITECH and other regulations. All human subject data (e.g., surveys) has been collected and managed only by personnel with adequate human subject protection certification.
1. Use our data freely. All CZO, USGS, and USDA-ARS Data Products* except those labelled Private** are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you give acknowledgement as described below. 2. Give proper acknowledgement. Publications, models and data products that make use of these datasets must include proper acknowledgement, including citing datasets in a similar way to citing a journal article (i.e. author, title, year of publication, name of CZO “publisher”, edition or version, and URL or DOI access information. See http://www.datacite.org/whycitedata). 3. Let us know how you will use the data. The dataset creators would appreciate hearing of any plans to use the dataset. Consider consultation or collaboration with dataset creators. *CZO Data Products. Defined as a data collected with any monetary or logistical support from a CZO.
Disclaimer of Warranty
BOISE STATE UNIVERSITY MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE INFORMATION CONTAINED IN OR PROVIDED AS PART OF THE SYSTEM FOR ANY PURPOSE. ALL SUCH INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. BOISE STATE UNIVERSITY HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS WITH REGARD TO THIS INFORMATION, INCLUDING ALL WARRANTIES AND CONDITIONS OF MERCHANTABILITY, WHETHER EXPRESS, IMPLIED OR STATUTORY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL BOISE STATE UNIVERSITY BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF INFORMATION AVAILABLE FROM THE SYSTEM. THE INFORMATION PROVIDED BY THE SYSTEM COULD INCLUDE TECHNICAL INACCURACIES OR TYPOGRAPHICAL ERRORS. CHANGES ARE PERIODICALLY ADDED TO THE INFORMATION HEREIN. COMPANY AND/OR ITS RESPECTIVE SUPPLIERS MAY MAKE IMPROVEMENTS AND/OR CHANGES IN THE PRODUCT(S) AND/OR THE PROGRAM(S) DESCRIBED HEREIN AT ANY TIME, WITH OR WITHOUT NOTICE TO YOU. BOISE STATE UNIVERSITY DOES NOT MAKE ANY ASSURANCES WITH REGARD TO THE ACCURACY OF THE RESULTS OR OUTPUT THAT DERIVES FROM USE OF THE SYSTEM.
Huber, David P.; Commendador, Amy; Finney, Bruce; Lohse, Kathleen A.; Aho, Ken A.; Seyfried, M.S.; and Germino, Matthew J.. (2018). Dataset for Sequestration of Soil Inorganic Carbon and Potential Sources in a Cold-Desert Ecosystem [Data set]. Retrieved from https://doi.org/10.18122/reynoldscreek/13/boisestate