Public Data Products

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SPRUCE Porewater Total Mercury and Methylmercury from Experimental Plots, Beginning in 2016

This data set reports the results of total mercury and methylmercury analyses of porewater samples from the SPRUCE experimental study plots located in the S1-Bog. Sample collection and analyses started in June of 2016 and will continue for the duration of the experiment. Data will be added to this data set and released to the public periodically as quality assurance and publication of results are accomplished.

Citation: 

Pierce, C.E., S. Psarska, J. Brozowski, S.D. Sebestyen, R.K. Kolka, E.A. Nater, B.M. Toner. 2019. SPRUCE Porewater Total Mercury and Methylmercury from Experimental Plots, Beginning in 2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.064/1504231

SPRUCE Fungal Necromass Litter Bag Decomposition Study in SPRUCE Experimental Plots, 2016-2018

This data set provided the results of a 2-year fungal necromass litter bag decomposition study at the Spruce and Peatland Responses Under Changing Environments (SPRUCE) experiment in the Marcell Experimental Forest in northern Minnesota, USA.

Citation: 

Fernandez, C.W., Heckman, K., Kolka, R. and Kennedy, P.G. 2019. SPRUCE Fungal Necromass Litter Bag Decomposition Study in SPRUCE Experimental Plots, 2016-2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.063/1503589

 

SPRUCE Deep Peat Heating (DPH) Environmental Data, February 2014 through July 2015

This data set provides a record of the half-hourly automated environmental data collected for 14 SPRUCE plots (4, 5, 6, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, and 21) during the Deep Peat Heating (DPH) study. In June 2014, deep soil heating was initiated at 5 warming levels (+0, +2.25, +4.5, +6.75 and +9 °C) with 2 replicate plots per level. Measurements were underway before the initiation of heating treatments and continued through July 27 of 2015 at the transition to whole-ecosystem warming manipulations.

Citation: 

Hanson, P.J., Riggs, J.S., Nettles, W.R., Krassovski, M.B., and Hook, L.A. 2015. SPRUCE Deep Peat Heating (DPH) Environmental Data, February 2014 through July 2105. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.013

SPRUCE: NDVI Data from Selected SPRUCE Experimental Plots, 2016-2018

This data set consists of observations of Normalized Difference Vegetation Index (NDVI) collected via stationary sensors positioned 1.5 meter above unobstructed areas of the ground layer. Sensors were installed above undisturbed community composition plots, that are not instrumented or destructively sampled in any way, in six of the ten chambered SPRUCE experimental study plots located in the S1-Bog.

Citation: 

McPartland, M.Y., Kane, E.S., Falkowski, M.J., Kolka, R., Turetsky, M.R., Palik, B., and Montgomery, R.A. 2019. SPRUCE: NDVI Data from Selected SPRUCE Experimental Plots, 2016-2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.057/1490190

SPRUCE Small Differences in Ombrotrophy Control Regional-Scale Variation in Methane Cycling among Sphagnum-Dominated Peatlands: Supporting Data

These data are provided in support of the SPRUCE publication: Small Differences in Ombrotrophy Control Regional-Scale Variation in Methane Cycling among Sphagnum-Dominated Peatlands (Zalman et al., 2018). Reports on the mechanisms controlling C cycling rates and greenhouse gas emissions using a combination of biogeochemical and microbial approaches in three low pH, Sphagnum-dominated peatlands in northern Minnesota.

Citation: 

C. Zalman, J.K. Keller, M. Tfaily, M. Kolton, L. Pfeifer-Meister, R.M. Wilson, X. Lin, J. Chanton, J.E. Kostka, A. Gill, A. Finzi, A. M. Hopple, B. J. M. Bohannan, and S.D. Bridgham. 2018. SPRUCE Small Differences in Ombrotrophy Control Regional-Scale Variation in Methane Cycling among Sphagnum­-Dominated Peatlands: Supporting Data. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.043/1434643

SPRUCE S1 Bog Seasonal Patterns of Nonstructural Carbohydrates in Larix, Picea, Rhododendron, and Chamaedaphne, 2013

This dataset reports the results of nonstructural carbohydrate (NSC) analyses of foliage/twig/root tissues collected at the SPRUCE site in 2013. Samples were obtained at various locations around the S1 Bog. These are pretreatment vegetation samples, collected prior to initiation of the SPRUCE experiment heating and elevated CO2 treatments.

Citation: 

Furze, ME, AM Jensen, JM Warren, AD Richardson. 2018. SPRUCE S1 Bog Seasonal Patterns of Nonstructural Carbohydrates in Larix, Picea, Rhododendron, and Chamaedaphne, 2013. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.037/1473917

SPRUCE: Sphagnum Productivity and Community Composition in the SPRUCE Experimental Plots

This data set reports annual dry matter production of Sphagnum in replicated growth columns, the composition of the moss community, and plot-average Sphagnum productivity in the SPRUCE experimental study plots located in the S1-Bog. Data are reported for 2016-2018 (October 2015 to October 2018). Additional data will be appended as they become available.

Citation: 

Norby RJ, Childs J. 2018. SPRUCE: Sphagnum Productivity and Community Composition in the SPRUCE Experimental Plots. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.049/1426474

SPRUCE Vegetation Phenology in Experimental Plots from Phenocam Imagery, 2015-2017

This data set consists of PhenoCam data from the SPRUCE experiment from the beginning of whole ecosystem warming in August 2015 through the end of 2017. Digital cameras, or phenocams, installed in each SPRUCE enclosure track seasonal variation in vegetation “greenness”, a proxy for vegetation phenology and associated physiological activity. Regions of interest (ROIs) were defined for vegetation types (1) Picea trees (EN, evergreen needleleaf); (2) Larix trees (DN, deciduous needleleaf); and (3) the mixed shrub layer (SH, shrubs).

Citation: 

Richardson, A.D., K. Hufkens, T. Milliman, D.M. Aubrecht, M.E. Furze, B. Seyednasrollah, M.B. Krassovski, and P.J. Hanson. 2018. SPRUCE Vegetation Phenology in Experimental Plots from Phenocam Imagery, 2015-2017. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.045

SPRUCE Ground Observations of Phenology in Experimental Plots, 2016-2017

This data set consists of phenological transition dates, as derived from direct observations of vegetative and reproductive phenology recorded by a human observer, from the SPRUCE experiment during the 2+ years (August 2015 through December 2017) of whole-ecosystem warming. For 2016, only springtime (April - June) phenological events are included. For 2017 (April - December), spring and autumn events are included.

Citation: 

Richardson, A.D., J.M. Latimer, W.R. Nettles, R.R. Heiderman, J.M. Warren, and P.J. Hanson. 2018. SPRUCE Ground Observations of Phenology in Experimental Plots, 2016-2017. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.044

SPRUCE Deep Peat Heating (DPH) to Whole Ecosystem Warming (WEW) Metagenomes for Peat Samples Collected June 2016

This data set provides links to the results of metagenomic analyses of 44 peat samples collected on 13 June 2016 from SPRUCE experiment treatment and ambient plots. Experimental plots had received approximately 24 months of belowground warming (deep peat heating (DPH), Hanson et al. 2015) with the last 9 of those months including air warming for implementation of whole ecosystems warming (WEW – Hanson et al. 2016). Data from these metagenomes are archived in the U.S.

Citation: 

Kluber, Laurel A., Daniel Z. Yip, Zamin K. Yang, Christopher W. Schadt. 2018. SPRUCE Deep Peat Heating (DPH) to Whole Ecosystem Warming (WEW) Metagenomes for Peat Samples Collected June 2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.053/1444071