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 

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.


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:IPYsnowshrub2007
Dataset Title:Welker IPY snow shrub 2007 and 2008 plant 15N, 13C, %N, %C, Toolik, Alaska.
Investigator 1: 
First Name:Jeff
Last Name:Welker
Organization:Ecosystem/Biomedical Lab
Address line 2:University of Alaska
Address line 3:
Zip Code:99508
Investigator 2: 
First Name:Paddy
Last Name:Sullivan
Organization:Ecosystem/Biomedical Lab
Address line 2:University of Alaska
Zip Code:99508
Associate Investigators:
Keywords:shrub site
Abstract:This is a study of how shrub-betula nana leaf 15N, 13C, %N, %C varies over the course of the summer in 2007 and 2008.
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
Online URL:
Data File URL
Data File Name Plant_mineral_nutrition_2007_and_2008.xls
Beginning Date 6/13/2007
End Date 8/15/2008
Number of Data Records 53
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Version 1 : Mar 2011 Received file from Jeff Welker. Updated the metadata sheet and created eml files and web files. JimL
Geographic Description Shrub patch near Toolik Lake on the North Slope of Alaska  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 68.623608  
Longitude -149.5712167  
Elevation 764 m  
Organisms studied
Methods:This is Betula nana leaf mineral nutrition as measured over the summer seasons in 2007 and 2008 at oursthrub site. Fresh fully expanded leaves were collected several times during the summer, air dried and then oven dried at 50oC for 48 hrs. Leaves where then ground to a powder in a bead beater. Subsamples were then weighed out for analysis. Total C and N were measured on our Elemental Analyzer and the subseqauent 15N and 13C were measured on the same samples using a Finnigan Detla plus stable isotope ratio mass spectrometer.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Betula shrub site text        
Species Betula Nana text        
Rep subsamples text        
Date Date is sample date datetime   dd/mm/yyyy    
Del 15N Del 15N is delta 15N values of leves number partPerThousand      
Del 13C Del 13C is the delta 13C values of leaves number partPerThousand      
% N % N is the nitrogen percent in leaves number percent      
%C % C is the carbon percent in leaves number percent