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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.
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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:||Below ground root biomass, carbon and nitrogen concentrations by depth increments 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, populations, burns, recovery|
|Abstract:||Below ground root biomass was measured by depth increments at three sites at and around the Anaktuvuk River Burn: severely burned, moderately burned and unburned. Roots were also analyzed for carbon and nitrogen concentrations.|
|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.10202&urlTail=burn/terrestrial/data/2011ARF_RootBiomassCN_ByDepth.csv|
|Data File Name||2011ARF_RootBiomassCN_ByDepth|
|Number of Data Records||151|
|Other Files to Reference||2011ARF_SoilCN_byDepth, 2011ARF_SoilCN_byQuad, 2011ARF_RootBiomassCN_byQuad, 2011ARF_AbvgrdBiomassCN_control, 2011ARF_AbvgrdBiomassCN_mod, 2011ARF_AbvgrdBiomassCN_severe|
|Quality Control Information|
|Log of Changes:||Updated Metadata sheet|
|Version 1: Updated metadata sheet to newer version (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||-150.272777777778||-150.2125||-150.281||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|
|Organisms studied||Eriophorum vaginatum|
|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 and percentages as indicated.
Two transects at each of three sites were harvested for aboveground biomass where transect 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. Above ground biomass data and methods are further 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 C and N concentrations in both soluble (NH4+, NO3-, DON, and DOC) pools and solid fractions. Soil data and further method description is available in file 2011ARF_SoilCN.
Coarse (> 2 mm) and fine roots (< 2 mm) were separated by hand from the other monolith (organic soil) and core (mineral soil). The core and monolith were sliced into 5 cm to 10 cm depth increments. Fine roots were separated into Eriophorum vaginatum roots (which are readily distinguished due to their vertical growth pattern, consistent diameter, and lack of branching) and other roots. The samples were dried at 70°C in a drying oven and after several days weighed to the nearest milligram at Toolik Field Station.
Root samples were analyzed for C and N content on a Costech Elemental Analyzer (Costech Analytical, Los Angeles, California, USA) calibrated with the NIST peach leaves standard (SRM 1547, National Institute of Standards and Technology, Gaithersburg, MD, USA).
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|
|Plot||Plot 1-10 for each transect||number||number||.=Missing or Not Measured|
|Layer||mineral or organic soil layer||text|
|Tussock||depth to the base of the layer||number||centimeter||.=Missing or Not Measured|
|Ice||0=no ice in core, 1= ice hit in core and stopped coring progress||number||gramPerMeterSquared||.=Missing or Not Measured|
|Depth bin (cm)||Incremental depth category||text||.=Missing or Not Measured|
|Depth (cm)||Actual measured depth of the bottom of the increment||number||gramPerMeterSquared||.=Missing or Not Measured|
|Erivag root mass (dry g/m2)||Mass of Eriophorum (fine) roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Erivag roots %C||Concentration of carbon in Eriophorum (fine) roots||number||percent||.=Missing or Not Measured|
|Erivag root C (dry gC/m2)||grams of carbon from Eriophorum vaginatum (fine) roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Erivag roots %N||Concentration of nitrogen in Eriophorum (fine) roots||number||percent||.=Missing or Not Measured|
|Erivag root N (dry gN/m2)||grams of nitrogen from Eriophorum vaginatum fine roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Other fine root mass (dry g/m2)||Mass of fine roots other than Eriophorum vaginatum||number||gramPerMeterSquared||.=Missing or Not Measured|
|Other fine roots %C||Concentration carbon in other fine roots||number||percent||.=Missing or Not Measured|
|Other fine root C (dry gC/m2)||Grams of carbon from fine roots other than Eriophorum vaginatum||number||gramPerMeterSquared||.=Missing or Not Measured|
|Other fine roots %N||Concentration of nitrogen in other fine roots||number||percent||.=Missing or Not Measured|
|Other fine root N (dry gN/m2)||Grams of nitrogen from fine roots other than Eriophorum vaginatum||number||gramPerMeterSquared||.=Missing or Not Measured|
|Coarse root mass (dry g/m2)||Mass of coarse roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Coarse roots %C||Coarse roots %C||number||percent||.=Missing or Not Measured|
|Coarse root C (dry gC/m2)||Grams of carbon from coarse roots||number||number||.=Missing or Not Measured|
|Coarse roots %N||Coarse roots %N||number||percent||.=Missing or Not Measured|
|Coarse root N (dry gN/m2)||Grams of nitrogen from coarse roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Total fine roots (g/m2)||Total mass of other fine roots and Eriophorum vaginatum||number||gramPerMeterSquared||.=Missing or Not Measured|
|Total fine root C (gC/m2)||Total grams of carbon from fine roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Total fine root N (gC/m2)||Total grams of nitrogen from fine roots||number||gramPerMeterSquared|
|Total root biomass (g/m2)||Total root biomass including fine and coarse roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Total carbon from all roots (g/m2)||Total grams of carbon from all roots||number||gramPerMeterSquared||.=Missing or Not Measured|
|Total nitrogen from all roots (g/m2)||Total grams of nitrogen from fine roots||number||gramPerMeterSquared||.=Missing or Not Measured|