Arctic LTER

Weather at Toolik

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 ID:	1993gsttbm.06
Dataset Title:	Early July plant biomass in mesic acidic tussock tundra, 1993, 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:	Bob
Last Name:	McKane
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Loretta
Last Name:	Johnson
Investigator 4:
First Name:	Jim
Last Name:	Laundre
Associate Investigators:
Keywords:	Alaska, biomass, productivity, tundra, primary production, inorganic nutrients, organic matter, populations
Abstract:	Quadrats (20cm x 20cm squares) along a line (block) were collected for plant biomass in mesic acidic tussock tundra. Each quadrat was separated into individual species, new and old aboveground and belowground biomass. The harvest occurred in early July to coincide with a 15N plant and soil harvest.
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.1379&urlTail=terrest/biomass/data/1993gsttbm.csv
Data File Name	1993gsttbm
Beginning Date	7/2/1993
End Date	7/6/1993
Number of Data Records	42
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: 11Dec2001 Separated comma delimited data from Excel file. JL 29Oct2004. Completed the variable description section and added a title. JL
	Version2: Creaded Excel metadata form. Changed title 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: Added #N/A as missing code into the metadata. Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH March 2013.

RESEARCH LOCATION:

Location Name

Mesic Tussock Tundra

Select Site or enter New One

Geographic Description

Toolik Lake, Foothills of Brooks Mountains, Alaska (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) Mesic Tussock Tundra - 1992 15N plots.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.6223

In Decimal Degrees

Longitude

-149.6099

In Decimal Degrees

Elevation

760

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Betula nana; Carex bigelowii; Empetrum nigrum; Eriophorum vaginatum; Ledum palustre; Pedicularis spp.; Polygonum spp.; Rubus chamaemorus; Salix spp.; Sphagnum spp.; Vaccinium uliginosum; Vaccinium vitis-idaea

Methods:	Four to five quadrats (20cm x 20cm squares) located randomly along a line near each of four blocks of 15N plots were destructively measured for species biomass (g/m2) and net primary production (g m-2 yr-1). Harvest times, June 26-28 1992, August 8-13 1992 and 2-6 July 1993, coincided with the times of 15N plant and soil harvests (see McKane, et al). Calculations: Units; Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2. Reference Citations: McKane, R. B., L. C. Johnson, G. R. Shaver, K. J. Nadelhoffer , E. B. Rastetter, B. Fry. A. E. Giblin, K. Kielland, B. L. Kwiatkowski, J. A. Laundre, and G. Murray. 2002. Resource-based niches provide a basis for plant species diversity and dominance in arctic tundra. Nature, 415:68-71 . Shaver, G. R., and F. S. Chapin. 1991. Production biomass relationships and element cycling in contrasting arctic vegetation types. Ecological Monographs 61:1-31. Sampling Description. 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 the only belowground tissues measured are rhizomes and stems. The samples are dried at 50-70 degrees C and weighed to the nearest milligram. Samples are returned to Woods Hole for nutrient analysis. Details are given in Shaver and Chapin (Ecological Monographs, 61(1), 1991, pg. 1.)

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Date of sampling. Generally sampling was + and - 2 days	datetime		dd-mmm-yyyy
Site	Site name.	text
Treatment	Experimental treatment plot.	text
Growth Form	The growth form	text
Species	The species	text
Tissue	The tissue type	text
Biomass Category	Tissue category for biomass summaries.	text
B1Q1	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B1Q2	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B1Q3	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B1Q4	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B1Q5	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B2Q1	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B2Q2	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B2Q3	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B2Q4	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B2Q5	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B3Q1	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B3Q2	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B3Q3	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B3Q4	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B3Q5	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B4Q1	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B4Q2	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B4Q3	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B4Q4	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
B4Q5	Oven dried weight (gm) of sample collected in a quadrat. (Code: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)	number	gramPerFourHundredthMeterSquared			#N/A
Average	Average of all quadrats for that species and tissue type	number	gramPerFourHundredthMeterSquared			#N/A
Std. Err.	Standard Error of the mean for species and tissue type	number	gramPerFourHundredthMeterSquared			#N/A
Count	Number of quadrats	number	number			#N/A
Average g_m2	Average of all quadrats expressed as g/m2	number	gramPerMeterSquared			#N/A
Std Err g_m2	Standard error of the mean g/m2	number	gramPerMeterSquared			#N/A

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