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:	1988gssabm.06
Dataset Title:	Biomass from six vegetation types along a toposequence on a floodplain terrace of the Sagavanirktok River, Alaswka,1988, Arctic LTER.
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, tundra, biomass, primary production, organic matter, populations
Abstract:	Biomass was harvested from six vegetation types along a toposequence on a floodplain terrace of the Sagavanirktok River in the northern foothills of the Brooks Range , Alaska (68degrees 46' N, 148 degrees 51' W 50m). The vegetation sites are; upland tussock tundra, "hilltop heath", a "hillslope shrub-lupine", a "footslope Equisetum", a wet sedge tundra, and a "riverside willow".
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.1376&urlTail=terrest/biomass/data/1988gssabm.csv
Data File Name	1988gssabm
Beginning Date	7/29/1988
End Date	8/2/1988
Number of Data Records	168
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: 17Mar95. Added comma delimited data and document to database. Original file is in excel 5, 88gssabm.xls. JimL. 10Nov2004. Updated the variable names and site names. Added title to metadata. JL
	Version2: Creaded Excel metadata form. Changed title, filename to full year 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 sheet to the new form and eml to 2.1 Jim L 9Jul2012
	Version 6: Taxonomic coverage data updated. Updated to newer metadata form (with sites sheet). CH March 2013.

RESEARCH LOCATION:

Location Name

Sagavanirktok River

Select Site or enter New One

Geographic Description

floodplain terrace of the Sagavanirktok River

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.7588

In Decimal Degrees

Longitude

-148.8418

In Decimal Degrees

Elevation

457

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Algae spp.; Arctostaphylos sp.; Betula nana; Bistort sp.; Boyckinia aconitifolia; Carex bigelowii; Carex spp.; Cassiope tetragona; Dryas sp.; Empetrum; Equisetum spp.; Eriophorum vaginatum; Ledum palustre; Lichens spp.; Lupinus arcticus; Salix spp.; Sedges spp.; Trichophorum caespitosum; Vaccinium uliginosum; Vaccinium vitis-idaea

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(1), 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. Notes: Error Handling In the original data file there existed three types of errors -888 Indicates missing data -999 Indicates missing a value which was probably included in another tissue type. -777 Indicates that leaves and stems were not separated, weights were entered as leaf wt. This occurs only for Cassiope. In order to calculate totals, averages, etc., the above errors were treated as listed below. -888 Converted to a blank which is treated as a missing value. Quadrats with missing values are excluded from further analysis. -999 This value is converted to a 0.These quadrats are included in subsequent analysis. -777 This value is also converted to a 0. These quadrats are included in subsequent analysis. Note: For the Willow site there are four values which result from the sum of a -999 error and a measured value.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Average date of sampling. A harvest usually lasted 5-6 days.	datetime		dd-mmm-yyyy
Site	Site name and number. See research location for description.	text
Treatment	Plot treatment. In this harvest just controls were sampled.	text
Growth Form	Growth form of plant species	text
Species	Plant species or lumped group of species sampled.	text
Tissue	Type of plant part sampled.	text
Biomass Category	Biomass category used for subtotals.	text
B1Q1gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat. The B stands for block and the number following the B is the block number. The Q stands for quadrat, with the number following the Q the quadrat number.	number	gramPerMeterSquared			#N/A
B1Q2gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B1Q3gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B1Q4gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B1Q5gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B2Q1gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B2Q2gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B2Q3gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B2Q4gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B2Q5gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B3Q1gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B3Q2gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B3Q3gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B3Q4gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B3Q5gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B4Q1gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B4Q2gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B4Q3gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B4Q4gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
B4Q5gm2	Oven dried weight (60 degrees C) of sample collected in a quadrat	number	gramPerMeterSquared			#N/A
Average g/m^2	The average of all quadrats for that species and tissue type	number	gramPerMeterSquared			#N/A
StdERR g/m^2	The Standard Error of the average	number	gramPerMeterSquared			#N/A
Count g/m^2	The number of samples used to calculate the Average and Std. Err.	number	number

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