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:	2004lggrgram.04
Dataset Title:	Growth data was collected on four graminoid species on Arctic LTER experimental plots in moist acidic tussock and dry heath tundra 2004, Toolik Field Station, 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:	Elizabeth
Last Name:	Ramsey
Associate Investigators:
Keywords:	growth, fertilizer, herbivory, inflorescences, disturbance, populations
Abstract:	Weekly growth of plant species of three growth forms were measured in the ninth year of a long-term experiment at Toolik Field Station. The experimental treatments excluded small and large mammalian herbivores and increased soil nutrients in two arctic Alaskan tundra communities: moist acidic tussock and dry heath. This data set reports the four graminoid (both tussock and rhizomatous forms) species. Please see 2004lggrbnan for Betula nana (dwarf shrub) growth data.
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.10021&urlTail=terrest/phengwth/data/2004lggrgram.csv
Data File Name	2004lggrgram
Beginning Date	6/14/2004
End Date	8/4/2004
Number of Data Records	3222
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Updated Metadata sheet
	Version 4: Updated metadata form to newer version (without site sheet). CH 24 Jan 2013 Updated to newer metadata with site sheet. CH March 2013.

RESEARCH LOCATION:

Location Name

LTER Moist Acidic Tussock Tundra

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Geographic Description

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

68.624411

In Decimal Degrees

Longitude

-149.609589

In Decimal Degrees

Elevation

760 m

In Meters

Link to Google Map

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TAXONOMIC COVERAGE:
Organisms studied	Eriophorum vaginatum var. vaginatum; Carex bigelowii; Hierochloe alpina; Carex microchaeta

Methods:	The LTER moist acidic tussock (MAT) site was set up in 1989. The experimental design is four blocks of 5 x 20 meter plots with randomly assigned treatments within each block. Treatments include control (CT), nitrogen (N), phosphorus (P) and nitrogen plus phosphorus (NP). Fertilizer is added annually following snowmelt in June as 10 g/m2 nitrogen (as NH4NO3) and 5 g/m2 phosphorus (as triple superphosphate). Exclosure plots were set up at the MAT site in July 1996 on extra 5 x 20 meter plots within the four-block design of the 1989 LTER acidic tussock experimental plots. On each plot a 5 x 10 meter section was fenced with large mesh (4-inch square mesh) and within this fence a 5 x 5 meter plot was fenced with a small mesh (1/2-inch square mesh). In each block two fenced plots were set up: a plot with no fertilizer and a plot with annual fertilization treatments as described above. Thus the treatments created are no fence, no fertilization (NFCT); small mesh fence, no fertilization (SFCT); large mesh fence, no fertilizer (LFCT); no fence, N plus P (NFNP); small mesh fence, N plus P (SFNP); and large mesh fence, N plus P (LFNP). Only plant species in NFCT, NFNP, SFCT, and SFNP were measured in 2004. The LTER dry heath (DH) site was also established in 1989 using the same methods at MAT in three block replicates. Exclosure plots were set up in 1996 using the same methods at MAT. The same plots were also used in plant species measurement in 2004. Reference citations: Gough, L., E.A. Ramsey, and D.R. Johnson. 2007. Plant-herbivore interactions in Alaskan arctic tundra change with soil nutrient availability. Oikos. 116: 407-418. Sampling description: Three individual plants of each of two graminoid species in each plot in each community were selected and tagged early in the 2004 field season. Measurements were determined based on that species growth form. The two tussock-forming graminoids had six non-flowering tillers on each tussock tagged individually. At each sampling date, the length of each leaf within each tagged tiller was recorded, along with the number of flowers per tussock. Individual non-flowering ramets of the two rhizomatous graminoids were assessed by measuring length of each leaf within the ramet at each sampling date, and examing ramets for flowering. Sampling was conducted weekly, beginning 14 Jule 2004 at MAT and 16 June 2004 at DH. Notes: Cells where there are no values zeros are used. If seed dispersal was not recorded, cells are marked with N/A. For INFL #, values reported are for tussock-forming graminoids only; if no values were recorded, cells are marked with N/A. For INFL Pres, Y or N are reported for rhizomatous-forming graminoids only; if presence was not noted on original data sheets, cells are marked with N/A. If AVG HT was not recorded, cells are marked with #N/A.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Species	Plant species measured.	text
Date	Dates the leaf was measured.	datetime		dd-mmm-yyyy
Site	The site of growth measurement.	text			MAT=Moist Acidic Tussock \| DH=Dry Heath
Block	The treatment block number	text
Treatment	The manipulated treatment.	text
Plant	The individual plant measured.	text
Tiller #	The individual tiller tagged on tussock-forming graminoids.	text
LF1T	The total length of leaf number 1	number	centimeter			#N/A
LF2T	The total length of leaf number 2	number	centimeter			#N/A
LF3T	The total length of leaf number 3	number	centimeter			#N/A
LF4T	The total length of leaf number 4	number	centimeter			#N/A
LF5T	The total length of leaf number 5	number	centimeter			#N/A
DISP?	Indicates dispersal of seeds	text
INFL #	Number of flowers per tussock-forming graminoids	number	number			#N/A
INFL Pres	Presence of flowers on rhizomatous graminoids	text
AVG HT	The average height of individual plant	number	centimeter			#N/A
Herbivore Damage	The percentage of type of damage	text

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