68 Works

SPRUCE Tritium in Porewater of SPRUCE Experimental Plots and Neighboring Peatlands, and in Groundwater, Stream Water, and Precipitation of the S1 Bog, 2014-2016

A. Visser, N.A. Griffiths & S.D. Sebestyen
This data set reports the tritium concentrations in (1) porewater from selected SPRUCE experimental plots located in the S1 bog and in (2) groundwater, streamwater, and precipitation in the S1 bog watershed, and (3) in porewater from the S2 bog, S3 fen, and Bog Lake fen. All sites are located at the USDA Forest Service, Marcell Experimental Forest (MEF) near Grand Rapids, MN. Samples were collected between June of 2014 and August of 2016. These...

SPRUCE Large-Collar In Situ CO2 and CH4 Flux Data for the SPRUCE Experimental Plots

P. Hanson, J. Phillips, J. Riggs, W. Nettles & D. Todd

Predawn Leaf Water Potential of Oak-Hickory Forest at Missouri Ozark (MOFLUX) Site: 2004-2017

S.G. Pallardy, L. Gu, J.D. Wood, K. P. Hosman & Y. Sun
Measurements of predawn leaf water potential (PLWP) have been made at weekly to biweekly intervals during the 2004 to 2017 growing seasons of the second-growth upland oak-hickory forests at the Missouri Ozark AmeriFlux (MOFLUX) site. The MOFLUX site is located in the University of Missouri Baskett Wildlife Research area (BWREA), situated in the Ozark Border Region of central Missouri, USA. Data Release Notes: The first release of PLWP data for MOFLUX covered the range of...

SPRUCE Stability of Peatland Carbon to Rising Temperatures: Supporting Data

R. Wilson, A. Hopple, M. Tfaily, S. Sebestyen, C. Schadt, L. Pfeifer-Meister, C. Medvedeff, K McFarlane, J. Kostka, M Kolton, R. Kolka & L. Kluber
This data set reports the results of extensive field measurements and laboratory analyses of samples from the SPRUCE experiment. Results indicate that ecosystem-scale warming of over 2 m of peat exponentially increased CH4 emissions —but not ecosystem respiration of CO2. Multiple lines of evidence, including incubations and in situ analyses of 14C, dissolved gases, and microbial community metabolic potential, indicate that CH4 emissions increased due to surface processes and not degradation of deeper buried carbon....

Fine-Root Ecology Database (FRED): A Global Collection of Root Trait Data with Coincident Site, Vegetation, Edaphic, and Climatic Data, Version 2.

C.M. Iversen, A.S. Powell, M.L. McCormack, C.B. Blackwood, G.T. Freschet, J. Kattge, C. Roumet, D.B. Stover, N.A. Soudzilovskaia, O.J. Valverde-Barrantes, P.M. Van Bodegom & C. Violle
The second version of the Fine-Root Ecology Database is available for download! Download the full FRED 2.0 data set, user guidance document, map, and list of data sources here. Prior to downloading the data, please read and follow the Data Use Guidelines, and it's worth checking out some tips for using FRED before you begin your analyses. Also, see here for an updating list of corrections to FRED 2.0.

SPRUCE Porewater Chemistry Data for Experimental Plots Beginning in 2013

N. Griffiths & S. Sebestyen
This data set reports the chemistry of porewater in the SPRUCE plots located in the S1 bog. Sample collection and analyses started in August of 2013 and will continue for the duration of the experiment. Results will be added to this data set and released to the public periodically as quality assurance and publication of results are accomplished. These data are the pre- and post-treatment data from the warming and elevated CO2 treatments associated with...

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

C.E. Pierce, S. Psarska, J. Brozowski, S.D. Sebestyen, R.K. Kolka, E.A. Nater & B.M. Toner
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.

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

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. Bohanna & S.D. Bridgham
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 the examination of 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. In particular, we investigated biogeochemical parameters (CH4 and CO2 production potentials, porewater and gas CH4 and CO2...

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

Laurel Kluber, Daniel Yip, Zamin Yang & Christopher Schadt
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). WEW Metagenomes: Data from these metagenomes are archived...

SPRUCE Representing Northern Peatland Microtopography and Hydrology within the Community Land Model: Modeling Archive

X. Shi, P. Thornton, D. Ricciuto, P. Hanson, J. Mao, S. Sebestyen, N. Griffiths & G. Bisht
Here we provide model code, inputs, outputs and evaluation datasets for a new configuration of the Community Land Model (CLM) for SPRUCE, which includes a fully prognostic water table calculation for SPRUCE. Our structural and process changes to CLM focus on modifications needed to represent the hydrologic cycle of bogs environment with perched water tables, as well as distinct hydrologic dynamics and vegetation communities of the raised hummock and sunken hollow microtopography characteristic of SPRUCE...

SPRUCE Whole Ecosystem Warming (WEW) Peat Water Content and Temperature Profiles for Experimental Plot Cores Beginning June 2016

J. Gutknecht, L. Kluber, P. Hanson & C. Schadt
This data set provides the peat water content and peat temperature at time of sampling for peat cores collected before and during the SPRUCE Whole Ecosystem Warming (WEW) study. Cores for the current data set were collected during the following bulk peat sampling events: 13 June 2016 and 23 August 2016. Over time, this dataset will be updated with each new major bulk peat sampling event, and dates/methods will be updated accordingly.

SPRUCE S1-Bog Phenology Movies, 2010-2016

P. Hanson, J. Riggs, L. Hook & W. Nettles
This data set provides annual movies created from daily and twice daily images of vegetation stands in the S1 Bog showing the seasonal changes of vegetation and appearance and disappearance of snow for the period June 2010 through December 2015. Compiled movies are useful for examining the phenology of the bog and the changes to the landscape as experimental facilities have been constructed.

SPRUCE Outflow Total Mercury and Methylmercury from Experimental Plots, Beginning in 2017

C.E. Pierce, S. Psarska, J. Brozowski, S.D. Sebestyen, R.K. Kolka, E.A. Nater & B.M. Toner
This data set reports the results of total mercury and methylmercury analyses of the chemical analyses of outflow samples from the SPRUCE experimental study plots located in the S1-Bog. Sample collection and analyses started in April of 2017 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.

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

R.J. Norby & J. Childs
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 (October 2015 to October 2016) and 2017 (October 2016 to October 2017). Additional data will be appended as they become available.

PiTS-1: Carbon Partitioning in Loblolly Pine after 13C Labeling and Shade Treatments

J. Warren, C. Iversen, C. Garten, R. Norby, J. Childs, D. Brice, R. Evans, L. Gu, P. Thornton & D. Weston
The PiTS task was established with the objective of improving the C partitioning routines in existing ecosystem models by exploring mechanistic model representations of partitioning tested against field observations. We used short-term field manipulations of C flow, through 13CO2 labeling, canopy shading and stem girdling, to dramatically alter C partitioning, and resultant data are being used to test model representation of C partitioning processes in the Community Land Model (CLM4 or CLM4.5).

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

P. Hanson, J. Riggs, W. Nettles, M. Krassovski & L. Hook
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...

SPRUCE Shrub-Layer Growth Assessments in S1-Bog Plots and SPRUCE Experimental Plots beginning in 2010

P.J. Hanson, J.R. Phillips, D.J. Brice & L.A. Hook
This data set reports shrub layer growth assessments for the S1-Bog on the Marcell Experimental Forest in Minnesota from 2010 through 2017. Data were obtained by destructively harvesting two 0.25 m2 plots within defined plot areas of the S1-Bog or SPRUCE experimental plots. In 2015, SPRUCE plots 4, 6, 8, 10, 11, 13, 16, 17, 19 and 20 were enclosed in the SPRUCE enclosures. Prior to 2015 all data are for open ambient conditions. In...

SPRUCE S1 Bog Pretreatment Photosynthesis and Respiration for Black Spruce: 2010-2013

A. Jensen, J. Warren, P. Hanson, J. Childs & S. Wullschleger

Soil Respiration and Microbial Biomass from Soil Incubations with 13C Labeled Additions

L. Kluber, J. Phillips, C. Schadt & M. Mayes

SPRUCE S1 Bog Vegetation Allometric and Biomass Data: 2010-2011

P. Hanson, D. Brice, C. Garten, L. Hook, J. Phillips & D. Todd
This data set reports the results of measurements on sampled aboveground tissues of trees (Picea mariana and Larix laricina), shrubs (Ledum, Chamaedaphne, and Vaccinium), and ground layer vegetation (all species) of the S1 Bog located in areas adjacent to planned experimental study plots. Ground layer vegetation was sampled from both hummocks and hollows, within a 0.25 m2 plot, to evaluate total standing biomass of bog vegetation at or near the peak of annual production. Vegetation...

SPRUCE S1 Bog Tree Basal Area and Understory Community Composition Assessed in the Southern and Northern Ends of the S1 Bog

C. Iversen, A. Garrett, A. Martin, M. Turetsky, R. Norby, J. Childs & T. Ontl
The composition and cover of woody and understory species, along with the timing of stem growth, were characterized near minirhizotron installations at the south and north ends of the S1 bog in order to understand the relationship between root dynamics and the surrounding plant communities. There are three data streams: (1) Woody species basal area -- the number, basal area, and distance from the center point of all trees within a 5-m radius of each...

SPRUCE S1 Bog Porewater, Groundwater, and Stream Chemistry Data: 2011-2013

N. Griffiths & S. Sebestyen
This data set reports the chemistry of S1 Bog porewater, outlet stream water, and groundwater from upland wells from 2011 through 2013. These data provide information for studies of the biogeochemical status of the bog and surrounding groundwater aquifer.

SPRUCE S1 Bog Sphagnum CO2 Flux Measurements and Partitioning into Re and GPP

A. Walker, K. Carter, P. Hanson, W. Nettles, J. Philips, S. Sebestyen & D. Weston
This data set provides (1) the results of in-situ Sphagnum-peat hourly net ecosystem exchange (NEE) measured using a LICOR 8100 gas exchange system and (2) the component fluxes -- gross primary production (GPP) and ecosystem respiration (Re), derived using empirical regressions.NEE measurements were made from 6 June to 6 November 2014 and 20 March to 10 May 2015. Three 8100 chambers per dominant species (S. magellanicum or S. fallax) were placed in the S1 Bog...

Registration Year

  • 2012
    2
  • 2014
    10
  • 2015
    4
  • 2016
    13
  • 2017
    15
  • 2018
    13
  • 2019
    11

Resource Types

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