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Title: SPRUCE Geochemical Changes in Porewater from Northern Peatlands at Multiple Depths in Field Samples and over Time in Peat Incubations

Abstract

This data set reports the results of the analysis of dissolved organic matter (DOM) in porewater samples collected from multiple depths in northern peatlands and during laboratory peat incubations to characterize the gain or loss of specific chemical moieties (e.g. CH2, H2, CH2O, etc.) that may be attributed to microbial degradation. During incubations, CO2 and CH4 concentrations and stable isotopes were determined by isotope ratio mass spectrometry. Porewater samples were collected from the S1 Bog (April 2015), a Sphagnum-dominated site at northern Minnesota peatland in the Marcell Experimental Forest, using permanently-installed piezometers, which provided profiles from the watertable surface to 200 cm depth. This is the site of the SPRUCE experiment. Porewater and peat samples were collected in July 2015 from an additional Sphagnum-dominated site within Stordalen Mire, Sweden, a palsa mire underlain by thawing permafrost, using perforated stainless steel tubes that were inserted into the peat to the desired depths (13 cm and 32 cm). Porewater samples were analyzed by Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS) followed by Kendrick mass transform analysis. The Kendrick mass (i.e., Kendrick 1963) transform analysis identifies the gain or loss of specific chemical moieties (e.g. CH2, H2, CH2O, etc.) via mass differences,more » and was used to infer potential microbial degradation pathways by which compounds were consumed in these samples. Increasing depth would suggest more degradation of DOM with the greater length of time for peat accumulation and similarly, with increasing length of peat incubation. During incubations, CO2 and CH4 concentrations and stable isotopes were determined by isotope ratio mass spectrometry.« less

Authors:
ORCiD logo ; ORCiD logo ; ; ; ; ORCiD logo ; ; ;
Publication Date:
DOE Contract Number:  
AC05-00OR227
Product Type:
Dataset
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
Subject:
54 ENVIRONMENTAL SCIENCES
Keywords:
dissolved organic matter, DOM, CO2, CH4, stable isotopes, isotope ratio mass spectrometry, porewater, northern peatlands
OSTI Identifier:
1673623
DOI:
https://doi.org/10.3334/CDIAC/spruce.042

Citation Formats

Wilson, R.M., Tfaily, M.M., Keller, J.K., Bridgham, S.D., Medvedeff Zalman, C., Hanson, P.J., Pfeifer-Meister, L., Chanton, J.P., and Kostka, J.E.. SPRUCE Geochemical Changes in Porewater from Northern Peatlands at Multiple Depths in Field Samples and over Time in Peat Incubations. United States: N. p., 2017. Web. doi:10.3334/CDIAC/spruce.042.
Wilson, R.M., Tfaily, M.M., Keller, J.K., Bridgham, S.D., Medvedeff Zalman, C., Hanson, P.J., Pfeifer-Meister, L., Chanton, J.P., & Kostka, J.E.. SPRUCE Geochemical Changes in Porewater from Northern Peatlands at Multiple Depths in Field Samples and over Time in Peat Incubations. United States. doi:https://doi.org/10.3334/CDIAC/spruce.042
Wilson, R.M., Tfaily, M.M., Keller, J.K., Bridgham, S.D., Medvedeff Zalman, C., Hanson, P.J., Pfeifer-Meister, L., Chanton, J.P., and Kostka, J.E.. 2017. "SPRUCE Geochemical Changes in Porewater from Northern Peatlands at Multiple Depths in Field Samples and over Time in Peat Incubations". United States. doi:https://doi.org/10.3334/CDIAC/spruce.042. https://www.osti.gov/servlets/purl/1673623. Pub date:Sun Jan 01 00:00:00 EST 2017
@article{osti_1673623,
title = {SPRUCE Geochemical Changes in Porewater from Northern Peatlands at Multiple Depths in Field Samples and over Time in Peat Incubations},
author = {Wilson, R.M. and Tfaily, M.M. and Keller, J.K. and Bridgham, S.D. and Medvedeff Zalman, C. and Hanson, P.J. and Pfeifer-Meister, L. and Chanton, J.P. and Kostka, J.E.},
abstractNote = {This data set reports the results of the analysis of dissolved organic matter (DOM) in porewater samples collected from multiple depths in northern peatlands and during laboratory peat incubations to characterize the gain or loss of specific chemical moieties (e.g. CH2, H2, CH2O, etc.) that may be attributed to microbial degradation. During incubations, CO2 and CH4 concentrations and stable isotopes were determined by isotope ratio mass spectrometry. Porewater samples were collected from the S1 Bog (April 2015), a Sphagnum-dominated site at northern Minnesota peatland in the Marcell Experimental Forest, using permanently-installed piezometers, which provided profiles from the watertable surface to 200 cm depth. This is the site of the SPRUCE experiment. Porewater and peat samples were collected in July 2015 from an additional Sphagnum-dominated site within Stordalen Mire, Sweden, a palsa mire underlain by thawing permafrost, using perforated stainless steel tubes that were inserted into the peat to the desired depths (13 cm and 32 cm). Porewater samples were analyzed by Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS) followed by Kendrick mass transform analysis. The Kendrick mass (i.e., Kendrick 1963) transform analysis identifies the gain or loss of specific chemical moieties (e.g. CH2, H2, CH2O, etc.) via mass differences, and was used to infer potential microbial degradation pathways by which compounds were consumed in these samples. Increasing depth would suggest more degradation of DOM with the greater length of time for peat accumulation and similarly, with increasing length of peat incubation. During incubations, CO2 and CH4 concentrations and stable isotopes were determined by isotope ratio mass spectrometry.},
doi = {10.3334/CDIAC/spruce.042},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {1}
}