Biomass, nitrogen and carbon of plants in the Arctic LTER experimental wet sedge tundra experimental sites, 2001, Toolik Lake, Alaska.

Abstract: 

Biomass, nitrogen and carbon of plants in the Arctic LTER experimental wet sedge tundra experimental sites, 2001, Toolik Lake, Alaska.. Treatments at each site included factorial NxP, greenhouse and shade house and were begun in 1985 (Sag site) or in 1988 (Toolik sites).

Project Keywords: 

Data set ID: 

1394

EML revision ID: 

9
Published on EDI/LTER Data Portal

Citation: 

Shaver, G. 2004. Biomass, nitrogen and carbon of plants in the Arctic LTER experimental wet sedge tundra experimental sites, 2001, Toolik Lake, Alaska. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/b3407bae411c523f4857753b09f620a0
People

Owner/Creator: 

Contact: 

Additional People: 

Associated Researcher
Dates

Date Range: 

Tuesday, July 24, 2001 to Wednesday, August 1, 2001

Publication Date: 

2004

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:
Toolik Inlet “Block 1” (CT, N, P, NP, GH, GHNP, and Shade treatments)
Treatments began summer of 1989; one 5x10m plot/treatment
Toolik Outlet "Block 2" (Same treatments)
Treatments began summer of 1989; one 5x10m plot/treatment
Toolik Outlet "Block 3" (Only CT, N, P and NP)
Treatments began summer of 1989; one 5x10m plot/treatment
Sag River toposequence "Block 4" (CT, N, P, and NP treatments)
Treatments began fall 1985 , 2 replicate plots,
each 2x10 m

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

Reference Citations: Shaver, G. R. and F. S. Chapin, III. 1991. Production/biomass relationships and element cycling in contrasting arctic vegetation types. Ecological Monographs 61:1-31.

Sampling Description.

Biomass quadrats, size 20x20 cm, were randomly located along line transects within plots. For Toolik control and NandP there were d and for GH and GHNP 4 quadrats/plot collected. At the Sag site 4 quadrats//treatment were collected. 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 non-green. After several days in the oven samples were weighed to nearest milligram. Samples are then returned to Woods Hole for nutrient analysis. Details are given in Shaver and Chapin (Ecological Monographs, 61(1), 1991, pg. 1.)

Version Changes: 

Log of changes:
                
Jan2004 Separated comma delimited data from Excel file. JL
Version 3:  : Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006  Jiml
Version 4: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 5: Update LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 6: Updated metadata form to new version and eml to 2.1.0  JimL 10Jul2012
Version 7: Taxonomic coverage data added. Updated metadata to newer form (with sites sheet). CH March 2013.
Version 8: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
Version 9: Changed Distribution URL since the LTER network DAS system is being discontinued.  JimL 9Apr2015

Sites sampled.

Full Metadata and data files (either comma delimited (csv) or Excel) - Environmental Data Initiative repository.

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy