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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 via LTER Data Poral
Dataset ID:86gsgrow.05
Dataset Title:Seasonal patterns of leaf exsertion, elongation and senescence for Eriophorum vaginatum and Carex bigelowii was measured in mesic tussock tundra sites 1985 to 1986, near Toolik Lake, AK.
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, leaf growth, tundra, disturbance, primary production
Abstract:Seasonal patterns of leaf exsertion, elongation and senescence for Eriophorum vaginatum and Carex bigelowii was measured in mesic tussock tundra sites near Toolik Lake, AK. In addition, the response of both species to NP fertilizer and to variation in site fertility (after track versus non-track areas) were also assayed and compared. The research was done over two full growing seasons.
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.1412&urlTail=terrest/phengwth/data/86gsgrow.csv
Data File Name 86gsgrow
Beginning Date 6/1/1985
End Date 9/1/1985
Number of Data Records 1542
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Log of changes: 10Oct96 Checked and organized data for comma delimited output. JL
Version 2: Updated attributes and add DAS control Jan 2010 JimL
Version 3: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 4: Updated metadata form to newer version (without site sheet). Fixed discrepency with header variable names. CH 24 Jan 2013. Updated to newer metadata with site sheet. CH March 2013.
Version 5: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 17Feb14
 
RESEARCH LOCATION:                                            
Location Name Toolik Imnavait Creek 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 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 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 Toolik Lake (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) North Slope, Alaska, USA Imnavait Creek R4D site Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description 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 68.629572 68.613 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.578316 -149.31 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 719 884 In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map View on Google Map                                        
                                             
 
TAXONOMIC COVERAGE:
Organisms studied Eriophorum vaginatum; Carex bigelowii
 
Methods:Both sites were in typical moist acidic sedge tussock tundra in which E. vaginatum was the dominant graminoid and C. bigelowii was subdominant. The comparison of control and fertilized plots was part of the same experiment described by Chapin and Shaver (1985). The fertilizer treatment consisted of annual application of 10 g per m2 of N (as NH4NO3) and 5 g per m2 P (as triple superphosphate), beginning in 1982. The microenvironmental comparison was done at Imanavait Creek, about 10 km NE of Toolik Lake. At Imnavait Creek we compared leaf growth in "non-track" tussock tundra and in "water tracks", which are areas of above-average surface and subsurface water flow.

Notes: Only tillers that did not flower are included in this file. When measurements stopped due to tiller death or herbivory a #N/A is recorded.. Where there are no values or the tiller senescent zeros are used. In cases where the total leaf length was unknown because of broken leaf tips the longest previous leaf length was used. In most cases these leaves had stopped growing.

Reference Citations: Chapin,FS,III; Shaver,GR (1985): Individualistic growth response of tundra plant species to manipulation of light, temperature and nutrients in a field experiment. Ecology 66, 564-576
Shaver,GR and JA Laundre(In prep.) Leaf exsertion, leaf elongation,
and leaf senescence in Eriophorum vaginatum and Carex bigelowii
in northern Alaska.

Sampling Description.

Measurements of leaf growth were made throughout the 1985 and 1986 growing seasons at approximately 10-day intervals. The tillers were selected haphazardly, with the restriction that they had to be near the edges of the study plots so that they could be measured without excessive trampling in the plot. The tillers were tagged and labeled, with individuals numbered 1-20. The older leaves that had no visible green tissue were clipped at the base to equal lengths. The clipped leaves were used as the 0 point to measure the total length and green length of all of the remaining leaves.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Toolik Lake or Imnavait Creek text        
Species Plant species measured. text        
Tiller Experimental treatment and sampling number. c - control plots; f - NP plots; n - non-track; t - track. text     c = control plots| f = NP plots| n = non-track| t = track  
Date Dates that tiller was measured. datetime   dd-mmm-yyyy    
LF1T The total length of leaf number 1 number centimeter      
LF1G The green length of leaf number 1 number centimeter      
LF2T The total length of leaf number 2 number centimeter      
LF2G The green length of leaf number 2 number centimeter      
LF3T The total length of leaf number 3 number centimeter      
LF3G The green length of leaf number 3 number centimeter      
LF4T The total length of leaf number 4 number centimeter      
LF4G The green length of leaf number 4 number centimeter      
LF5T The total length of leaf number 5 number centimeter      
LF5G The green length of leaf number 5 number centimeter      
LF6T The total length of leaf number 6 number centimeter      
LF6G The green length of leaf number 6 number centimeter      
LF7T The total length of leaf number 7 number centimeter      
LF7G The green length of leaf number 7 number centimeter      
LF8T The total length of leaf number 8 number centimeter      
LF8G The green length of leaf number 8 number centimeter      
LF9T The total length of leaf number 9 number centimeter      
LF9G The green length of leaf number 9 number centimeter      
LF10T The total length of leaf number 10 number centimeter      
LF10G The green length of leaf number 10 number centimeter      
LF11T The total length of leaf number 11 number centimeter      
LF11G The green length of leaf number 11 number centimeter      
LF12T The total length of leaf number 12 number centimeter      
LF12G The green length of leaf number 12 number centimeter      
LF13T The total length of leaf number 13 number centimeter      
LF13G The green length of leaf number 13 number centimeter      
LF14T The total length of leaf number 14 number centimeter      
LF14G The green length of leaf number 14 number centimeter      
LF15T The total length of leaf number 15 number centimeter      
LF15G The green length of leaf number 15 number centimeter      
LF16T The total length of leaf number 16 number centimeter      
LF16G The green length of leaf number 16 number centimeter      
LF17T The total length of leaf number 17 number centimeter      
LF17G The green length of leaf number 17 number centimeter      
LF18T The total length of leaf number 18 number centimeter      
LF18G The green length of leaf number 18 number centimeter      
TotalL TotalL was determined by adding together the total leaf lengths of all leaves at each survey date. number centimeter      
TotalG TotalG was determined by adding together the green leaf lengths of all leaves at each survey date. number centimeter      
TotalS The sum of the lengths of senescent tissue (expressed as a negative number) (TotalS was calculated by subtracting TotalL from TotalG.) number centimeter      
LeafTot The total number of leaves (at each survey date). number centimeter      
LivLTot The total number of leaves that have green tissue (at each survey date). number centimeter      
NewLvs The total number of new leaves (at each survey date). number centimeter      
OldLvs The total number of old leaves (at each survey date). number centimeter      

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