Conditions of Use
The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:
1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:
Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml
4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:
Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.
5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.
By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.
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|Dataset URLs:||METADATA: HTML, Rich Text, XML(EML compliant) |
DATA: Comma Delimited, Excel file with Metadata and data, Dataset via LTER Data Portal
|Dataset Title:||Soil properties and nutrient concentrations by depth from the Anaktuvuk River Fire site in 2011|
|Investigator 1:|| |
|Organization:||Department of Biology|
|Address line 2:||University of Florida|
|Address line 3:||Bartram-Carr Hall|
|Investigator 2:|| |
|First Name:||M. Syndonia|
|Organization:||Institute of Arctic Biology|
|Address line 2:||University of Alaska Fairbanks|
|Address line 3:|
|Investigator 3:|| |
|Organization:||The Ecosystem Center|
|Address line 2:||Marine Biological Laboratory|
|Investigator 4:|| |
|Organization:||The Ecosystem Center|
|Address line 2:||Marine Biological Laboratory|
|Address line 3:||7 MBL St.|
|Keywords:||Alaska, biomass, productivity, tundra, primary production, disturbance, organic matter, burns, recovery, carbon, nitrogen|
|Abstract:||Below ground soil bulk density, carbon and nitrogen was measured at various depth increments in mineral and organic soil layers at three sites at and around the Anaktuvuk River Burn: severely burned, moderately burned and unburned. This data corresponds with the aboveground biomass and root biomass data files: 2011ARF_AbvgroundBiomassCN, 2011ARF_RootBiomassCN_byDepth, 2011ARF_RootBiomassCN_byQuad, 2011ARF_RootBiomassCN_byQuad.|
|For questions about the Metadata and data contact the Investigators.
For information about this web site contact:
|Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Online URL: http://ecosystems.mbl.edu/ARC/
|DATA FILE INFORMATION:|
|Data File URL||http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10204&urlTail=burn/terrestrial/data/2011ARF_SoilCN_byDepth.csv|
|Data File Name||2011ARF_SoilCN_byDepth|
|Number of Data Records||154|
|Other Files to Reference||2011ARF_AbvgrdBiomassCN_control, 2011ARF_AbvgrdBiomassCN_mod, 2011ARF_AbvgrdBiomassCN_severe, 2011ARF_RootBiomassCN_byDepth, 2011ARF_RootBiomassCN_byQuad, 2011ARF_SoilCN_byQuad|
|Quality Control Information|
|Log of Changes:||Updated Metadata sheet|
|Version 1: Metadata updated to newer form (with sites sheet). CH March 2013.|
|Version 2 Corrected eml excel .xls -> .xlsx JimL|
|Version 3: updated investigator information (Dec2013-JD)|
|Version 4: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 15Jan14|
|Location Name||Unburned flux tower||Moderate burn flux tower||Severe burn flux Tower||Select Site or enter New One||Select Site or enter New One||Select Site or enter New One||Select Site or enter New One||Select Site or enter New One|
|Geographic Description||Anaktuvuk River Fire - Unburned flux tower (Station 2309) North Slope, Alaska||Anaktuvuk River Fire - Moderate burn flux tower (Station 2308 ) North Slope, Alaska||Anaktuvuk River Fire - Severe burn flux tower (Station 2304 ) North Slope, Alaska||Enter Description||Enter Description||Enter Description||Enter Description||Enter Description|
|Location Bounding Box|
|West Bounding Coordinate|
|East Bounding Coordinate|
|North Bounding Coordinate|
|South Bounding Coordinate|
|OR if single point location|
|Latitude||68.9344444444445||68.9522222222222||68.9966666666667||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees|
|Longitude||-150.28||-150.28||-150.28||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees||In Decimal Degrees|
|Elevation||In Meters||In Meters||In Meters||In Meters||In Meters|
|Link to Google Map||View on Google Map||View on Google Map||View on Google Map|
|Methods:||The Anaktuvuk River Fire occurred in 2007 on the North Slope of Alaska. In 2008, three eddy covariance towers were established at sites representing unburned tundra, moderately burned tundra, and severely burned tundra. The three sites (unburned, moderately burned and severely burned) were harvested for analysis of biomass, carbon concentration and nitrogen concentration during the summer of 2011. |
Units: Tissue mass data are expressed in g/m2 , µg/m2 or percentages as indicated.
Two transects at each of three sites were harvested for aboveground biomass, where transects 108 and 109 are from the unburned control site, 101 and 114 are from the severely burned site and 103 and 104 are from the moderately burned site . Quadrats measuring 10 x 40 cm were harvested every 5 meters over 50 meter transects for a total of 20 quadrats per site. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Briefly, harvest method were as follows: the rhizome-containing soil layer was harvested by cutting around each quadrat boundary with a serrated bread knife. All aboveground live vascular plant biomass, and all live rhizomes and belowground stems within the quadrat boundaries, were separated by species. Data for aboveground biomass and further methods are explained in 2011ARF_AbvgroundBiomassCN.
For every second quadrat in a transect, two contiguous 10 x 20 cm soil monoliths were excised from the side of the pit, extending from the surface of the green moss to the surface of the mineral soil (roughly 5-30 cm depth depending on location). In addition, two cores (2.42 cm in diameter) were taken through the mineral soil from the bottom of these monoliths to the ice surface at the bottom of the thawed layer. Monoliths and cores were wrapped in tinfoil to preserve structure, returned to the field station, and refrigerated prior to analyses. Within 24 hours of collection, one monolith and one core from each location were processed for determination of microbial biomass, bulk density, moisture, and carbon (C) and nitrogen (N) concentrations in both soluble pools and solid fractions. Coarse (> 2 mm) and fine roots (< 2 mm) were separated by hand from the other monolith and core respectively. Root data and method information is available in the file 2011ARF_RootBiomassCN_byDepth and 2011ARF_RootBiomassCN_byPlot.
Soil samples from monoliths and cores were separated into depth increments between 5 and 10 cm wide starting at the surface of the layer (mineral or organic). Samples were homogenized by hand and coarse organic materials (>2.5 cm twigs and roots) and rocks were removed. A subsample of 10 g (wet weight) homogenized soil was extracted with 2M KCl overnight, for determination of soluble DOC (dissolve organic carbon), DON (dissolved organic nitrogen), NH4+ and NO3- concentrations. A second 10 g subsample was fumigated with chloroform for 24 hours prior to extraction with 2M KCl as above, for determination of microbial biomass. Extracts were frozen prior to analysis for NH4+ and NO3- using an Astoria Pacific (Astoria, Oregon) colorimetric auto analyzer, and a Shimadzu TOC-L auto analyzer with a TN unit (Columbia, Missouri) for DOC and DON. Coarse and fine soil fractions were weighed wet, dried at 70° C for 48 hours to determine dry matter content, then ground on a Wiley mill with a 40 mm sieve. Dry matter content of fine mineral soil was also determined on subsamples dried at 105°C for 48 hours. For all samples dried at 70°C, C and N content was measured on the same Costech Elemental Analyzer as the roots. The volume of each organic monolith layer or mineral core was calculated as depth times area minus the volume of rocks. Bulk density, C and N pools for soil fractions, and C and N pools for extracted fractions, were calculated for both mineral and organic horizons.
Data summarized by quadrat area is shown in file 2011ARF_SoilCN_byQuad. This worksheet shows all data measurements for all depths taken in the mineral and organic soil layers.
For further information reference:
Bret-Harte, M.S., Mack, M.C., Shaver, G.R., Huebner, D.C., Johnston, M., Johica, C.A., Pizano, M.C., Reiskind, J.A. (2013) The response of arctic vegetation and soils following the Anaktuvuk River fire of 2007. Philosophical Transactions of the Royal Society: Biological Science, Submitted.
If no samples were present in the biomass data, zeros were used. Where calculations were not possible dots were used as place holders
|Variable Name||Variable Description||Data Type||Units||DateTime Format||Code Information||Missing Value Code|
|Year||Year of root harvest||datetime||YYYY|
|Harvest||Site of harvest||text|
|Fire Disturbance||Degree of fire disturbance||text|
|Transect||Transect, where 108 & 109 are from the unburned control site, 101 & 114 are from the severely burned site and 103 & 104 are from the moderately burned site||number||number||.=Missing or Not Measured|
|Quadrat||Plot 1-10 for each transect||number||number||.=Missing or Not Measured|
|Layer||mineral or organic soil layer||text|
|Tussock||0=plot is not on an Erivag tussock, 1=plot on tussock||text|
|Ice||0=no ice in core, 1= ice hit in core and stopped coring progress||text|
|Depth bin (cm)||Incremental depth category||text||.=Missing or Not Measured|
|Mean depth (cm)||Actual measured depth of the bottom of the increment||number||centimeter||.=Missing or Not Measured|
|Bulk %C||Homogenized soil bulk carbon concentration||number||percent||.=Missing or Not Measured|
|Bulk %N||Homogenized soil bulk nitrogen concentration||number||percent||.=Missing or Not Measured|
|Bulk d (g/cm3)||Homogenized soil bulk density (measured on cut monoliths (organic soil) or field cores (mineral soil))||number||gramPerCentimeterCubed||.=Missing or Not Measured|
|ug-N-NH4/g ode||Homogenized soil ammonium concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|ug-N- NO3/g ode||Homogenized soil nitrate concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|ug C-DOC/g ode t0||Homogenized soil dissolved organic carbon concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|ug N-DON/g ode t0||Homogenized soil dissolved organic nitrogen concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|MB ug C-DOC/ g ode t1||Homogenized soil microbial biomass (chloroform-labile) carbon concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|MB ug N-TN/ g ode t1||Homogenized soil microbial biomass (chloroform-labile) nitrogen concentration per gram oven dry equivalent soil (2N KCl extract)||number||microgramPerGram||.=Missing or Not Measured|
|gN/m2||Homogenized soil bulk nitrogen pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gC/m2||Homogenized soil bulk carbon pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gC-COD/m2||Coarse organic debris (>2mm diameter) carbon pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gN-NH4+/m2||Homogenized soil ammonium pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gN-NO3-/m2||Homogenized soil nitrate pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gN-DON/m2||Homogenized soil dissolved organic nitrogen pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gC-DOC/m2||Homogenized soil dissolved organic carbon pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gN-MBN/m2||Homogenized soil microbial biomass nitrogen pool||number||gramPerMeterSquared||.=Missing or Not Measured|
|gC-MBC/m2||Homogenized soil microbial biomass carbon pool||number||gramPerMeterSquared||.=Missing or Not Measured|