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:	1982gsasbm.7
Dataset Title:	Biomass in wet sedge tundra near the Atigun River crossing of the Dalton Highway, North Slope AK, 1982.
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:	Terry
Last Name:	Chapin
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:	Alaska, annual variation, biomass, calcium, magnesium, productivity, nitrogen, nutrients, phosphorus, potassium, tundra, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:	Biomass in wet sedge tundra near the Atigun River crossing of the Dalton Highway, North Slope AK. .There were three harvests; Late May-early June; Late July-early August; Late August-early September. See Shaver and Chapin (Ecological Monographs, 61, 1991 pp.1-31.
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.1400&urlTail=terrest/biomass/data/1982gsasbm.csv
Data File Name	1982gsasbm
Beginning Date	6/1/1982
End Date	9/1/1982
Number of Data Records	93
Other Files to Reference
Availability Status	1
Quality Control Information
Maintenance Description
Log of Changes:	For Archival Use:DATA FILE ENTERED BY: Jim Laundre DATA FILE VALIDATION: NAME: Jim Laundre DATE: 3Apr95 LOG OF CHANGES AND COMMENTS
	Version 2: Created excel metadata form with atrribute table and title. 9Jan06 JimL
	Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
	Version 4: updated units to best practices
	Version 5: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 6: Updated metadata sheet and to eml 2.1 JimL 9Jul2012
	Version 7: Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH March 2013.

RESEARCH LOCATION:
Location Name	Atigun Wet Sedge	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	Atigun Wet Sedge, Atigun River crossing of the Dalton Road near Atigun Gorge, Alaska, U.S.A.	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	68.45	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Longitude	-149.363	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Elevation	803	In Meters	In Meters	In Meters	In Meters	In Meters	In Meters	In Meters
Link to Google Map	View on Google Map

TAXONOMIC COVERAGE:
Organisms studied	Carex aquatilis; Carex sp.; Crysosplenium sp.; Draba sp.; Eriophorum angustifolium; Eriophorum scheuchzeri; Minuartia sp.; Pedicularis sp.; Peltigera sp.; Poa sp.; Polygonum sp.; Salix pulchra; Saxifraga sp.; Stellaria sp.; Valeriana capitata
Methods:	Field- Samples are obtained by collecting all aboveground biomass and belowground stems and rhizomes in 20 x 20 cm quadrats, located randomly along line transects within the site. Normally, 4 or 5 quadrats are collected along each of 4 transects at each site or treatment. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Details are given in Shaver and Chapin (Ecological Monographs, 61, 1991, pg. 1.) Lab- Each quadrat is first sorted into species and then into tissue type. 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, etc. The separated samples are dried for several days at approximately 65 ºC and then weighed. The dry weight for each quadrat, species and tissue type is recorded. Finally the samples from all quadrats in a transect are combined according to tissue type. Samples are then returned to Woods Hole for nutrient analysis. This File covers three biomass harvests at the sedge site; early season, mid season, and late season. Table 1: Biomass Harvests Date Site Treatment -------------------- ------------------------------- ---------------------------------- 01-Jun-1982 Atigun Wet Sedge Control Toolik Heath Control Toolik Shrub Control 1981 Toolik Tussock Control 31-Jul-1982 Atigun Wet Sedge Control Toolik Heath Control 1 981 Toolik Tussock Control 01-Sep-1982 Atigun Wet Sedge Control 1981 Toolik Tussock Control Notes: This data was converted from old Multiplan files to Excel (April 1994). No documentation exists for the original Multiplan files. All files were converted to Excel 5.0. Excel worksheet names are similar to the original Multiplan filenames. This file (82gsasbm.dat) is the 'Wetnut' worksheet of the Excel 5.0 file. The Excel 5.0 file 82gsasbm.xls is also available.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Growth Form	Plant growth form, i.e. graminoid, deciduous, evergeen, forb, mosses, lichen, algae.	text
Species	Plant species or tissue subtotals	text
Tissue	Plant part harvested.	text
BMHI	Biomass in g/ m^2 for Harvest I	number	gramPerMeterSquared
BMHII	Biomass in g/ m^2 for Harvest II	number	gramPerMeterSquared
BMHIII	Biomass in g/ m^2 for Harvest III	number	gramPerMeterSquared
NMHI	Nitrogen mass in g/m^2 for Harvest I	number	gramPerMeterSquared
NMHII	Nitrogen mass in g/m^2 for Harvest II	number	gramPerMeterSquared
NMHIII	Nitrogen mass in g/m^2 for Harvest III	number	gramPerMeterSquared
PMHI	Phosphorus mass in g/m^2 for Harvest I	number	gramPerMeterSquared
PMHII	Phosphorus mass in g/m^2 for Harvest II	number	gramPerMeterSquared
PMHIII	Phosphorus mass in g/m^2 for Harvest III	number	gramPerMeterSquared
KMHI	Potassium mass in g/m^2 for Harvest I	number	gramPerMeterSquared
KMHII	Potassium mass in g/m^2 for Harvest II	number	gramPerMeterSquared
KMHIII	Potassium mass in g/m^2 for Harvest III	number	gramPerMeterSquared
CAMHI	Calcium mass in g/m^2 for Harvest I	number	gramPerMeterSquared
CAMHII	Calcium mass in g/m^2 for Harvest II	number	gramPerMeterSquared
CAMHIII	Calcium mass in g/m^2 for Harvest III	number	gramPerMeterSquared
MGMHI	Magnesium mass in g/m^2 for Harvest I	number	gramPerMeterSquared
MGMHII	Magnesium mass in g/m^2 for Harvest II	number	gramPerMeterSquared
MGMHII	Magnesium mass in g/m^2 for Harvest III	number	gramPerMeterSquared
	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.