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:	96gsphsg.05
Dataset Title:	Phenological stages of sedges were observed at a long term experimental moist tussock tundra site and a long-term experimental wet sedge tundra sites (Arctic LTER) for 1996 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:	Andrew
Last Name:	Gould
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Jim
Last Name:	Laundre
Associate Investigators:
Keywords:	Alaska, plant phenology, nitrogen, phosphorus, tundra, disturbance, populations
Abstract:	Phenological stages of sedges were observed at a long term experimental moist tussock tundra site and a long-term experimental wet sedge tundra sites near Toolik Lake, AK. Also, ITEX maximum growth measurements were recorded on August 19th (moist tussock tundra). Experimental treatments at each site included factorial NxP, greenhouse and shadehouse and were begun in 1989. See 96gsphdc.html and 96gsphsg.html for phenological data on deciduous and evergeen species.
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.1418&urlTail=terrest/phengwth/data/96gsphsg.csv
Data File Name	96gsphsg
Beginning Date	6/1/1996
End Date	9/1/1996
Number of Data Records	222
Other Files to Reference	96gsphdc.html and 96gsphsg.html
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes:
	Version 1: converted to EML metadata
	Version 2: updated attribute table and add DAS
	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 Corrected non data in date filed JimL:
	Version 6 added missing value in metadata for date. JimL
	Version 7 corrected 'x' being in date column JimL
	Versuion 8: corrected text in date filed JimL

RESEARCH LOCATION:

Location Name

LTER Moist Acidic Tussock Tundra

LTER Wet Sedge Tundra Block 1

LTER Wet Sedge Tundra Block 2

Select Site or enter New One

Geographic Description

Moist Acidic Tussock Tundra LTER Experimental plots

Wet Sedge Block 1

Wet Sedge block 2

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.624052

68.625388

68.647622

In Decimal Degrees

Longitude

-149.610586

-149.602481

-149.577298

In Decimal Degrees

Elevation

750

717

719

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Carex bigelowii; Eriophorum angustifolium; Carex rotundata; Carex chordiarhiza

Methods:	Plots were setup as indicated below, with annual fertilization treatments of 10 g/m2 Nitrogen (as NH4NO3) and 5 g/m2 Phosphorous (as triple superphosphate) . Greenhouses and shadehouses were annually set up in early June and removed in the end of August Sites: Moist Tussock Tundra Blocks 1-4 (CT, N, P, NP, GH, GHNP, Shade, and ShadeNP treatments) Treatments began summer of 1989; one 5x20m plot/treatment Wet Sedge Block 1 - Toolik Inlet (CT, N, P, NP, GH, GHNP, and Shade treatments) Indicated as "Block 1" Treatments began summer of 1989; one 5x10m plot/treatment Block 2 - Toolik Outlet (Same treatments) "Block 2" Treatments began summer of 1989; one 5x10m plot/treatment Notes: The longest leaf was not measured in the wet sedge plot on the plants monitored for phenology. Snow covered the site before measurements were made. See 96gsgrow.dat for leaf length for Carex rotundata and Eriophorum angustifolium. Calculations: No calculations, all data in date format. Sampling Description. Moist Tussock Tundra: Betula nana, Ledum palustre, Vaccinium vitis-idaea, Carex bigelowii, and Rubus chamaemorus. Three groups of individuals of each species were randomly selected within each plot. An individual of each species was tagged and used as the center of a 15cm radius monitoring circle. The monitoring area for C. bigelowii was a 50cm circle, due to its relative rarity in the plots. Individuals 1-3 were in Block 1, 4-6 in Block 2, etc. Plots were visited every 2-5 days and the dates in which phenological stages occurred were noted. New stem growth of Betula, Ledum, and Vaccinium was defined as the distance between last years bud scar and the tip of the apical bud. These measurements were taken on the most apical branch of a randomly selected individual within the monitoring circle. The longest leaf on this year's stem was measured from the base of the petiole to the tip of the blade, for these three species. If an individual of Carex was flowering within the monitoring circle, then the length of the longest leaf of that individual was measured from the top of the leaf sheath to the tip of the blade. The inflorescence culm was also measured from the top of the leaf sheath to the tip of the blade. If no individuals were flowering within the monitoring circle, then a randomly selected tiller was measured for leaf length. The longest leaf of a randomly selected Rubus was measured from the point of attachment to the stem to the tip of the central lobe. Measurements of maximum growth were recorded on August 19th. Wet Sedge Tundra: Eriophorum angustifolium, Carex rotundata, and Carex chordiarhiza. Five groups of individuals of each species were randomly selected in each plot. Pin flags were used as the center of the 1m radius monitoring circles. Individuals marked 1-5 were in Block 1 and those marked 6-10 were in Block 2. Plots were visited every 2-5 days and the dates in which phenological stages occurred were noted. The distance from the top of the leaf sheath to the tip of the longest leaf and to the tip of the inflorescence were measured on randomly selected individuals within the monitoring circles. Notes: The longest leaf was not measured in the wet sedge plot on the plants monitored for phenology. Snow covered the site before measurements were made.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
SPECIES	Plant species sampled.	text
SITE	Sites of monitoring TUS = tussock WS = wet sedge	text
BLCK	Block number that the sample was observed	text
TRT	Experimental treatment	text
SMPL#	The sampling number of the individual	text
1ST LF EXERTED	Date of First new leaf exerted	datetime		dd-mmm-yyyy		#N/A=Missing or Not Measured
INF CULM ELONG	Date of Inflorescence culm elongation	datetime		dd-mmm-yyyy		#N/A=Missing or Not Measured
ANTHESIS	Date ofShedding pollen	datetime		dd-mmm-yyyy		#N/A=Missing or Not Measured
SEED SHEDDING	Date of Seed Shedding	datetime		dd-mmm-yyyy		#N/A=Missing or Not Measured
LNGST LF LNGTH	Length of the longest new leaf on Aug 19th	number	centimeter			#N/A=Missing or Not Measured
INF CULM LNGTH	Length of the inflorescence culm on Aug 19th	number	centimeter			#N/A=Missing or Not Measured

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