Arctic LTER

Weather at Toolik

Arctic LTER Database

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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:	1999SHretrans.06
Dataset Title:	Foliar and litter nutrients and retranslocation efficiencies (N, P, K, Ca, Mg, Al) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999.
Investigator 1:
First Name:	Sarah
Last Name:	Hobbie
Organization:	Department of Ecology, Evolution and Behavior
Address line 2:	University of Minnesota
Address line 3:	1987 Upper Buford Circle
City:	St. Paul
State:	MN
Zip Code:	55108
Country:	USA
Investigator 2:
First Name:	Laura
Last Name:	Gough
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Tiffany
Last Name:	Miley
Investigator 4:
First Name:	Angie
Last Name:	Moline
Associate Investigators:
Keywords:	litter nutrients, retranslocation, moist acidic tundra, moist non-acidic tundra, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:	Foliar and litter nutrients and retranslocation efficiencies (N, P, K, Ca, Mg, Al) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999.
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.1408&urlTail=terrest/biomass/data/1999SHretrans.csv
Data File Name	1999SHretrans
Beginning Date	7/15/1999
End Date	8/31/1999
Number of Data Records	84
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	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: 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:Updated metadata to newer form (with sites sheet). CH March 2013.
	Version 7: Changed date to text since it is noon standard form JimL 17May13

RESEARCH LOCATION:

Location Name

LTER Moist Acidic Tussock Tundra

LTER Moist NonAcidic Tussock 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). Moist Acidic Tussock Tundra.

Arctic LTER, Toolik Field Station, North Slope Alaska(68 degrees 38'N, 149 degrees 34'W, elevation 760 m). Moist Non-acidic Tussock Tundra.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.62405

68.6342

In Decimal Degrees

Longitude

-149.61058

-149.64074

In Decimal Degrees

Elevation

750

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	Foliar samples were collected in late-July, 1999, from 6 points located every 5 meters along transects at each site. At a sampling point, the following were collected for each species (depending on the site): five tillers of Eriophorum; 3 tillers of Carex; 4-5 long shoots of Betula; 3-4 leaves of Rubus; 5 current year's shoots of Ledum, Vaccinium, and Dryas; 5 leaves of Polygonum; and one clump (approximately 25 cm2) of green Sphagnum, Hylocomium, and Tomenthypnum moss. Leaves from a transect point were pooled within species, removed from stems, and analyzed fresh for leaf area on a portable LICOR leaf area meter (LICOR Inc., Lincoln, Nebaraska). Leaves were subsequently dried (65¡C), weighed (to determine specific leaf area), ground, and analyzed for N by combustion on a Carlo-Erba CHN analyzer (Carlo-Erba Instruments, Milan Italy), and for P, Ca, Mg, K, and Al by ICP (following digestion in 10% HCl) (Munter and Grande 1981). Determinations of P, base cations, and Al were done at the University of Minnesota's Research Analytical Laboratory. Senesced samples were collected in mid-August, 1999. Because of the scarcity of senesced material, senesced leaves were sampled differently from live leaves. At a sampling point, the following were collected for each species (depending on the site): 30 senesced leaf tips of Eriophorum and Carex; senesced leaves from 5-10 long shoots of Betula; 5 senesced leaves of Polygonum and Rubus; and senesced leaves from 5 shoots of Dryas. One bulk sample of senesced leaves was collected for Ledum and Vaccinium at each site, and for Betula at the non-acidic site. We analyzed senesced leaves for specific leaf area, as above. Leaves from different points along the transect were combined within a species and site for nutrient analyses due to small sample masses. Calculations: We calculated retranslocation efficiency as the difference in the area-based nutrient pool size before and after senescence relative to the pool size before senescence multiplied by 100. Because nutrient concentrations of dead leaves were analyzed on pooled samples, we used average nutrient concentrations of live leaves for these calculations. Thus we have one retranslocation value for each species at each site with no replication. Reference Citations: Hobbie, S. E. and L. Gough. 2002. Foliar and soil nutrients in tundra on glacial landscapes of contrasting ages in northern Alaska. Oecologia 131:453-452

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
DATE	date in MMM, DD-MMM-YYYY format	text
SITE	MAT refers to moist acidic tundra; MNT refers to moist non-acidic tundra	text
SPECIES	species are named with the first 3 letters of the genus and the first 3 letters of the specific epithet; e.g., Betnan is Betula nana	text
REP	replicate (1-6)	text
SLALIVE	specific leaf area of live leaves	number	centimeterSquaredPerGram			#N/A=Missing or Not Measured
SLADEAD	specific leaf area of dead leaves	number	centimeterSquaredPerGram			#N/A=Missing or Not Measured
NLIVE	percent N in live leaves g N/100 g leaf	number	percent			#N/A=Missing or Not Measured
NDEAD	percent N in dead leaves g N/100 g leaf	number	percent			#N/A=Missing or Not Measured
NRETRANS	N retranslocation efficiency percent	number	percent			#N/A=Missing or Not Measured
PLIVE	percent P in live leaves g P/100 g leaf	number	percent			#N/A=Missing or Not Measured
PDEAD	percent P in dead leaves g P/100 g leaf	number	percent			#N/A=Missing or Not Measured
PRETRANS	P retranslocation efficiency percent	number	percent			#N/A=Missing or Not Measured
KLIVE	percent K in live leaves g K/100 g leaf	number	percent			#N/A=Missing or Not Measured
KDEAD	percent K in dead leaves g K/100 g leaf	number	percent			#N/A=Missing or Not Measured
KRETRANS	K retranslocation efficiency percent	number	percent			#N/A=Missing or Not Measured
CALIVE	percent Ca in live leaves g Ca/100 g leaf	number	percent			#N/A=Missing or Not Measured
CADEAD	percent Ca in dead leaves g Ca/100 g leaf	number	percent			#N/A=Missing or Not Measured
CARETRANS	Ca retranslocation efficiency percent	number	percent			#N/A=Missing or Not Measured
MGLIVE	percent Mg in live leaves g Mg/100 g leaf	number	percent			#N/A=Missing or Not Measured
MGDEAD	percent Mg in dead leaves g Mg/100 g leaf	number	percent			#N/A=Missing or Not Measured
MGRETRANS	Mg retranslocation efficiency percent	number	percent			#N/A=Missing or Not Measured
COMMENTS	these are comments regarding specific data points	text				#N/A=Missing or Not Measured

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