Arctic LTER Database

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.

Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data, Dataset via LTER Data Poral
Dataset ID:2011ARF_AbvgrdBiomassCN_severe.03
Dataset Title:Above ground plant and below ground stem biomass of samples from the severely burned site of the Anatuvuk River fire, Alaska
Investigator 1: 
First Name:M. Syndonia
Last Name:Bret-Harte
Organization:Institute of Arctic Biology
Address line 2:University of Alaska Fairbanks
Address line 3:
City:Fairbanks
State:AK
Zip Code:99775-7000
Country:USA
Investigator 2: 
First Name:Mack
Last Name:Michelle
Organization:Department of Biology
Address line 2:University of Florida
City:Gainesville
State:FL
Zip Code:32611
Country:USA
Investigator 3: 
First Name:Gaius
Last Name:Shaver
Organization:The Ecosystem Center
Address line 2:Marine Biological Laboratory
Address line 3:7 MBL St.
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 4: 
First Name:James
Last Name:Laundre
Organization:The Ecosystem Center
Address line 2:Marine Biological Laboratory
Address line 3:7 MBL St.
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Associate Investigators:
Keywords:Alaska, biomass, productivity, tundra, primary production, disturbance, organic matter, populations, burns, recovery
Abstract:Above ground plant and below ground stem biomass were measured in 2011 from three sites at and around the Anaktuvuk River Burn: severely burned, moderately burned and unburned. These samples were 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
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10201&urlTail=burn/terrestrial/data/2011ARF_AbvgrdBiomassCN_severe.csv
Data File Name 2011ARF_AbvgrdBiomassCN_severe
Beginning Date 7/24/2011
End Date 7/28/2011
Number of Data Records 55
Other Files to Reference 2011ARF_SoilCN_byPlot, 2011ARF_SoilCN_byDepth, 2011ARF_RootBiomassCN_byPlot, 2011ARF_RootBiomassCN_byDepth, 2011ARF_AbvgrdBiomassCN_control, 2011ARF_AbvgrdBiomassCN_mod
Availability Status 1
Quality Control Information
Maintenance Description
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: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 15Jan14
 
RESEARCH LOCATION:                  
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            
                   
 
TAXONOMIC COVERAGE:
Organisms studied Betula nana, Rubus chamaemorus, Vaccinium uliginosum, Andromeda polifolia, Cassiope tetragona, Ledum palustre, Oxycoccus microcarpus, Vaccinium vitis-idaea, Pedicularis lanata, Pedicularis lapponica, Carex bigelowii, Carex rotundata, Eriophorum angustifolium, Eriophorum vaginatum, Mixed Lichen, Leaf Litter, Sphagnum, Poa arctica, Calamagrostis lapponica/stricta, Saxifraga nelsoniana, Tofieldia pusilla, Marchantia
 
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, carbon and nitrogen concentrations are expressed in percentages.

Sampling description:
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. Current-year’s growth from meristems located within the quadrat was included in the sample even if that growth extended outside the quadrat. New growth from meristems located outside, but that extended into the quadrat, was not included in the sample. For older stems that crossed the boundary, only the portion within the quadrat boundaries was included.
Biomass produced in the current year by each vascular plant was separated into leaves, new aboveground stems, and inflorescences with their peduncles, except that new growth from rhizomes was included with previous years’ growth. Older biomass was separated into belowground stems and rhizomes, aboveground stems, and (for evergreens only) old leaves. All graminoid, forb, and deciduous shrub leaves were considered to be new biomass. Belowground stems were separated from aboveground old stems at the position of the first adventitious roots. Vascular plant litter and attached dead biomass were saved, but not separated by species. These biomass harvest methods are consistent with our previous and ongoing LTER studies and thus allow direct comparisons.
Lichens, mosses (green portions only), and liverworts (Marchantia polymorpha from burned sites) were not separated into species or new and old growth. Green moss biomass has been estimated to consist of approximately 20% new growth in those species where old and new growth can be distinguished, but they are not the majority of moss species present in tussock tundra. All plant samples were dried at 60oC for 72 hours and weighed to the nearest milligram at Toolik Field Station. Samples lighter than 0.004 g were weighed on a five-place scale in Woods Hole, MA. Samples were weighed in their bags unless they were lighter than 10 standard deviations of the average weight of the bag.

We pooled material of each plant tissue type (excluding roots) and species from all quadrats from a given transect into blocks where quadrats 1-5 and 6-10 for each transect were lumped, resulting in four blocks per sample site. Blocked samples were ground in a Wiley mill with a 40 mm sieve and analyzed for C and N content by a Thermo Scientific Flash 2000 NC Soil Analyzer (Thermo Fisher Scientific, Cambridge, UK). C and N pools in biomass and NPP were calculated by multiplying the biomass of each plant species and tissue component by the appropriate concentration of C or N (from the pooled sample), and then summing over all species and tissues for each growth form in each quadrat.

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.

Biomass harvest methods:
Shaver GR, Chapin FS, III. Production: biomass relationships and element cycling in contrasting arctic vegetation types. Ecological Monographs. 1991; 61(1):1-31.
Bret-Harte MS, Mack MC, Goldsmith GR, Sloan D, DeMarco J, Shaver GR, et al. Plant functional types do not predict biomass responses to removal and fertilization in Alaskan tussock tundra. Journal of Ecology. 2008; 96:713-26.

Zeros/Dots:
If no sample of a tissue type was present in the biomass data, zeros were used. Where calculations were not possible dots were used as place holders.

Taxonomic nomenclature: scientific names reflect historic names in conformity with other documents on this site. Note that Ledum palustre is now currently known as Rhododendron tomentosum, Saxifrage nelsoniana is now known as Micranthes nelsoniana (information from the Integrated Taxonomic Information System (itis.gov)).

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Date Date of pluck start datetime   DD-MMM-YYYY   .=Missing or Not Measured
Site Sampling area text       .=Missing or Not Measured
Fire disturbance burn severity: unburned, moderately burned or severely burned text       .=Missing or Not Measured
Growth Form Taxonomic grouping of sample text       .=Missing or Not Measured
Species plant species or type text       .=Missing or Not Measured
Tissue Tissue type text       .=Missing or Not Measured
Biomass category New growth, old growth or below ground growth text       .=Missing or Not Measured
101-Q1 Oven dried weight of sample collected in a quadrat. number gramPerMeterSquared     .=Missing or Not Measured
101-Q2 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q3 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q4 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q5 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q6 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q7 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q8 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q9 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
101-Q10 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q1 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q2 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q3 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q4 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q5 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q6 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q7 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q8 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q9 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
114-Q10 oven dried weight of sample collected in a quadrat number gramPerMeterSquared     .=Missing or Not Measured
Average (g/m2) Average of all quadrats in a particular Fire disturbance for that species and tissue type number gramPerMeterSquared     .=Missing or Not Measured
Std Err (g/m2) Standard error of the mean for species and tissue type number gramPerMeterSquared     .=Missing or Not Measured
count Number of quadrats number number     .=Missing or Not Measured
%C 101 Q1-5 Average percent carbon in the oven dried samples from quadrats 1-5 in transect A (where A is quadrats 101, 103 or 108 and B is quadrat 114, 104 or 108 depending on burn severity) number percent     .=Missing or Not Measured
%N 101 Q1-5 Average percent nitrogen in the oven dried samples from quadrats 1-5 in transect A (where A is quadrats 101, 103 or 108 and B is quadrat 114, 104 or 108 depending on burn severity) number percent     .=Missing or Not Measured
%C 101 Q6-10 Average percent carbon in transect A quadrats 6-10 number percent     .=Missing or Not Measured
%N 101 Q6-10 Average percent nitrogen in transect A quadrats 6-10 number percent     .=Missing or Not Measured
%C 114 Q1-5 Average percent carbon in transect B quadrats 6-10 number percent     .=Missing or Not Measured
%N 114 Q1-5 Average percent nitrogen in transect B quadrats 6-10 number percent     .=Missing or Not Measured
%C 114 Q6-10 Average percent carbon in transect B quadrats 6-10 number percent     .=Missing or Not Measured
%N 114 Q6-10 Average percent nitrogen in transect B quadrats 6-10 number percent     .=Missing or Not Measured