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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:1994gswsbmnp.07
Dataset Title:Plant biomass, leaf area, carbon, nitrogen, and phosphorus in wet sedge tundra, 1994, Arctic LTER, Toolik Lake, Alaska.
Investigator 1: 
First Name:Gus
Last Name:Shaver
Organization:Marine Biological Lab
Address line 2:7 MBL St.
Address line 3:
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 2: 
First Name:Jim
Last Name:Laundre
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:Alaska, biomass, productivity, nitrogen, phosphorus, tundra, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:Plant biomass, leaf area, carbon, nitrogen, and phosphorus were measured in three wet sedge tundra experimental sites. Treatments at each site included factorial NxP and at the Toolik sites greenhouse and shade house. Treatments started in 1985 (Sag site) and in 1988 (Toolik sites).
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.1381&urlTail=terrest/biomass/data/1994gswsbmnp.csv
Data File Name 1994gswsbmnp
Beginning Date 7/25/1994
End Date 8/3/1994
Number of Data Records 672
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Log of changes: 11Mar95 Separated comma delimited data from Excel file. JL 28Oct2004 Checked and completed the variable description section and added C, N % P data. Re-organized the data to match other biomass files. JL
Version2: Creaded Excel metadata form. Changed titler and added attribut table. 10Jan06 JimL
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 5: Updated the metadata form to new version and eml to 2.1.0 JimL 9Jul2012
Version 6: Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH march 2013.
Version 7: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
 
RESEARCH LOCATION:                                            
Location Name Toolik Sagavanirktok River 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 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 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 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 Toolik Lake LTER wet sedge (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) North Slope, Alaska, U.S.A Sagavanirktok River (68 degrees 46'N, 148 degrees 52'W, elevation 470 m) North Slope, Alaska, U.S.A Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description 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 68.6253 68.7588 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.6024 -148.8418 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 719 457 In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map View on Google Map                                        
                                             
 
TAXONOMIC COVERAGE:
Organisms studied Andromeda; Carex cordirhiza; Carex rotundata; Eriophorum angustifolium; Trichophorum
 
Methods:Plots were setup as indicated below, with annual fertilization treatments of 10 g/m2 Nitrogen (as NH4NO3) and 5 g/m2 Phosphorous (as triple superphosphate) . Greenhouses and shade houses were annually set up in late May or early June and removed in the end of August or early September.
Sites: Block 1 - Toolik Inlet (CT, N, P, NP, GH, GHNP, and Shade treatments)
Treatments began summer of 1989; one 5x10m
plot/treatment
Block 2 - Toolik Outlet (Same treatments)
Treatments began summer of 1989; one 5x10m
plot/treatment
Block 3 - Sag River toposequence wet sedge site (CT, N, P, and NP treatments)
Consider as "Block 3" for comparison with Toolik sites, but
the wet sedge is site 2 in the toposequence experiment.
Treatments began fall 1985 , 2 replicate plots,
each 2x10 m

Notes: There were several miss marked bags: 2 bags of block 2 N ‘Other carex’, sheath. Values very close; averaged the values. There is a missing block 2 ‘Other Carex’ Sheath Shade treatment; used the average from the block 2 N ‘Other Carex’ sheath. There were 2 block 1 moss NP; averaged the values. There is an unknown leaf found in an Andromeda bag.

Calculations: Units; Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2. Leaf blade area are in cm2/quadrat. Multiply by .0025 to get m2 leaf/m2 ground.

Sampling Description.

Biomass quadrats, size 20x20 cm, were randomly located along line transects within plots. There were 4 quadrats/plot (treatment) collected in Blocks 1 and 2, and 2 quadrats/plot (2 plots/treatment) at the Sag site. All aboveground biomass plus belowground stems and rhizomes were clipped in 20x20 cm quadrats. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Quadrats were sorted within 24 hours into species and then into tissue type. Tissue categories were standard, except for graminoid sheaths. Because some species, especially Carex cordirhiza, included many culms, "sheaths" included culms as well. Leaf Blades were the only other aboveground biomass category for graminoids, so inflorescence also went into the "sheaths" category. This is potentially a problem in analysis, because much of the mass of C. cordirhiza is culms and attached, aboveground sheaths, whereas the "sheath" category for other graminoids is almost entirely belowground and nongreen. All leaf blade material from Blocks 1 and 2 was run through the LiCor leaf area meter before drying. They were then dried at 50-70 degrees C in a drying oven. After several days in the oven samples were weighed to nearest milligram. Samples are then returned to Woods Hole for nutrient analysis. All samples were ground at least to 60 mesh, either on a Wiley mill or home made roller mill. Nitrogen and Carbon was analyzed on a Perkin-Emler CHN analyzer and Phosphorus was analyzed by the method of Aspila, et al (Analyst 101 pp. 187-197). Details on biomass harvest are given in Shaver and Chapin (Ecological Monographs, 61(1), 1991, pg. 1.)
In Blocks 1 and 2, light and dark LiCor measurements were made on quadrats 2-4 before harvesting (see 94gsbflx.txt)

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Date Aveage date that plots were sampled. Sampling occurred from 25Jul04 to 3Aug04. datetime   dd-mmm-yyyy    
Site Site name. See methods for complete description. text        
Treatment Plot treatment. See methods for complete description. text        
Growth Form Growth form of species text        
Species Plant species or lumped group of species sampled. text        
Tissue Type of plant part sampled. text        
Block Treatment block. Since the wet sedge communities for this region are small, the blocks refer to different locations. See the methods sections for details. text        
Quadrat1 Oven dried weight (g/quadrat (400 cm2)) of biomass in quadrat 1 number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Quadrat2 Oven dried weight (g/quadrat (400 cm2)) of biomass in quadrat 2 number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Quadrat3 Oven dried weight (g/quadrat (400 cm2)) of biomass in quadrat 3 number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Quadrat4 Oven dried weight (g/quadrat (400 cm2)) of biomass in quadrat 4 number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Average quadrat biomass Average plant biomass in all quadrats for that species and tissue number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
SE quadrat biomass Standard Error of mean for plant biomass in all quadrats for that species and tissue number gramPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Count quadrat Number of quadrats number number     #N/A=Missing or Not Measured
%N Quadrat % Nitrogen in the harvested plants from pooled sample from all quadrats. number percent     #N/A=Missing or Not Measured
%C Quadrat % Carbon in the harvested plants from pooled sample from all quadrats. number percent     #N/A=Missing or Not Measured
%P Quadrat % Phosphorus in the harvested plants from pooled sample from all quadrats. number percent     #N/A=Missing or Not Measured
LeafArea Q1 Leaf Area for graminiods in quadrat 1 number centimeterSquaredPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
LeafArea Q2 Leaf Area for graminiods in quadrat 2 number centimeterSquaredPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
LeafArea Q3 Leaf Area for graminiods in quadrat 3 number centimeterSquaredPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
LeafArea Q4 Leaf Area for graminiods in quadrat 4 number centimeterSquaredPerFourHundredthMeterSquared     #N/A=Missing or Not Measured
Comments Notes about data text        

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.