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:	2006lgdhbmcn.04
Dataset Title:	Above ground plant and below ground stem biomass in the Arctic LTER dry heath tundra experimental plots, 2006, Toolik Lake, Alaska
Investigator 1:
First Name:	Laura
Last Name:	Gough
Organization:	Department of Biology
Address line 2:	Box 19498
Address line 3:	University of Texas at Arlington
City:	Arlington
State:	Texas
Zip Code:	76019
Country:	USA
Investigator 2:
First Name:	David
Last Name:	Johnson
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Brian
Last Name:	Moon
Investigator 4:
First Name:	Jef
Last Name:	Knight
Investigator 5:
First Name:	Amie
Last Name:	Treuer
Investigator 6:
First Name:	Carol
Last Name:	Moulton
Investigator 7:
First Name:	Charla
Last Name:	Jordan
Associate Investigators:
Keywords:	Alaska, biomass, producitivity, carbon, nitrogen, heath, tundra, exclosure, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:	Above ground plant and below ground stem biomass, percent nitrogen, and percent carbon were measured in the Arctic LTER dry heath tundra experimental plots. Treatments included control, and nitrogen and phosphorus amended plots for 10 years, and exclosure plots with and without added nitrogen and phosphorus.
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.10025&urlTail=terrest/biomass/data/2006lgdhbmcn.csv
Data File Name	2006lgdhbmcn
Beginning Date	7/24/2006
End Date	8/2/2006
Number of Data Records	393
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Version 2: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 3: Updated to eml 2.1; changed date format to dd-mon-yy and moved seedling information to commnets. Jim L 22May12
	Version 4: Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH March 2013

RESEARCH LOCATION:

Location Name

LTER Heath Tundra

Select Site or enter New One

Geographic Description

Arctic LTER, Toolik Field Station, North Slope Alaska (68 degrees 38'N, 149 degrees 34'W, elevation 760 m). Dry heath tundra.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.64089

In Decimal Degrees

Longitude

-149.58735

In Decimal Degrees

Elevation

724

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Arctostaphylos alpina; Betula nana; Calamagrostis sp.; Carex microchaeta; Diapensia lapponica; Empetrum nigrum; Hierochloe alpina; Ledum palustre; Loiseleuria procumbens; Poa arctica; Polygonum bistorta; Salix phleobophylla; Trisetum spicata; Vaccinium uliginosum; Vaccinium vitis-idaea

Methods:	The LTER dry heath (DH) exclosure treatments were set up in 1996 on extra 5 x 20 meter plots within the three-block design of the 1989 LTER dry heath experimental site. On each plot, a 5 x 10 meter section was fenced with large mesh (4-inch square mesh) to exclude large mammals. Within this fence a 5 x 5 meter plot was fenced with a small mesh (1/2-inch square mesh) to exclude both large and small mammals. In each block two fenced plots were set up: a plot with no fertilizer and a plot with annual fertilization (NP) treatments added as 10g/m2 nitrogen (as NH4NO3) and 5 g/m2 phosphorus (as triple superphosphate). In this biomass harvest, only no fence, no fertilizer (NFCT); small mesh fence, no fertilizer (SFCT); no fence, N plus P (NFNP); and small mesh fence, N plus P (SFNP) treatments were sampled in 2006. 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. Calculations: Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2. Sampling description: Biomass quadrats, size 20 x 20 cm, were taken from treatment. Four quadrats were randomly located along transect lines in each of the replicate blocks of each treatment. 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. The samples were dried at 50-70 degrees C in a drying oven and after several days weighed to the nearest milligram. Samples were lumped by block and subsequently ground in a Wiley Mill and analyzed for percent C and N using a Perkin-Elmer CHN analyzer (Series 2400). Notes: If no samples were present in the biomass data, zeros are used. If no samples were analyzed for %C and %N, decimal points were used as place holders.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Date of sampling	datetime		dd-mon-yy
Site	Tundra site of sampling	text
Treatment	Plot treatment	text
Growth Form	Growth form of species	text
Species	The species sampled or a lumped group	text
Tissue	The tissue type	text
Biomass Type	Growth category of the biomass sample	text
B1Q1	oven dried weight of sample collected in a quadrat. (Code of variable name: 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 of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B1Q3	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B1Q4	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B2Q1	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B2Q2	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B2Q3	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B2Q4	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B3Q1	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B3Q2	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B3Q3	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
B3Q4	oven dried weight of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			#N/A
Average g/quad	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	number	gramPerMeterSquared			#N/A
Std. Err. g/m2	Standard Error of the mean in	number	gramPerMeterSquared			#N/A
B1%C	The percent carbon in tissues from species or lumped group in all quadrats in block 1	number	percent			#N/A
B1%N	The percent nitrogen in tissues from species or lumped group in all quadrats in block 1	number	percent			#N/A
B2%C	The percent carbon in tissues from species or lumped group in all quadrats in block 2	number	percent			#N/A
B2%N	The percent nitrogen in tissues from species or lumped group in all quadrats in block 2	number	percent			#N/A
B3%C	The percent carbon in tissues from species or lumped group in all quadrats in block 3	number	percent			#N/A
B3%N	The percent carbon in tissues from species or lumped group in all quadrats in block 3	number	percent			#N/A
Comments	Comments on what species are included in the "other" categories	text

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