Five or six quadrats (20cm x 20cm squares) along a line (block) were collected for plant biomass in mesic tussock tundra. In the lab each quadrat was separated into individual species, new and old aboveground and belowground biomass.
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plots were setup in June 1992 for a 15N experiment. Harvest occurred from 20 July to 25 1998.
Calculations: Units; Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2.
Quadrats, 20x20 cm, were collected and sorted into species and then into tissue type. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Depending on the harvest, tissue types can be broad categories, i.e. above and below, or more detailed, i.e. inflorescences, new growth, old growth, belowground rhizomes, etc. In most cases only large rhizomes and belowground stems are ever measured. The samples are dried at 50-70 degrees C and a 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.)
Log of changes:
11Dec2001 Separated comma delimited data from Excel file. JL
Version 2: Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006 Jiml
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Update 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: Added comments in rows to Comments column. Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH March 2013.
Version 7 Corrected date format JimL 17May13
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
Full Metadata and data files (either comma delimited (csv) or Excel) - Environmental Data Initiative repository.
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