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:	2000gsla.07
Dataset Title:	Leaf area for select species was measured in arctic tundra experimental sites from late June into early August,Toolik Field Sattion, Alaska, Arctic LTER 2000.
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:	Joseph
Last Name:	Rodriguez
Organization:
Address line 2:
City:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:	Alaska, tundra, biomass, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:	Leaf area for select species was measured in arctic tundra experimental sites from late June into early August. Measurements were made in acidic and non acidic tussock tundra and in shrub tundra in control and fertilized plots.
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.1389&urlTail=terrest/biomass/data/2000gsla.csv
Data File Name	2000gsla
Beginning Date	6/12/2000
End Date	7/31/2000
Number of Data Records	537
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	DATA FILE ENTERED BY: Joseph M. Rodriguez DATA FILE VALIDATION: NAME: Jim Laundre DATE: LOG OF CHANGES AND COMMENTS 24Jan2002 Cleaned up documentation and up file in Arctic LTER database. JL
	Version3: Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006 Jiml
	Version 4: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
	Version 5: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 6: Updated metadata form to new version and eml to 2.1.0 JimL 10Jul2012
	Version 7: Updated taxonomic coverage data. Updated metadata to newer form (with sites sheet). CH 2013.

RESEARCH LOCATION:

Location Name

LTER Moist Acidic Tussock Tundra 1981 Plots

Select Site or enter New One

Geographic Description

Toolik Lake (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) Tussock Tundra - 1981 plots, control and NP fertilized.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.6295

In Decimal Degrees

Longitude

-149.578

In Decimal Degrees

Elevation

760

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Andromeda polifolia; Arctagrostis; Arctostaphylus; Betula nana; Carex bigelowii; Cassiope tetragona; Dryas; Empetrum nigrum; Eriophorum angustifolium; Eriophorum vaginatum; Ledum palustre; Pedicularis; Rubus chamaemorus; Salix; Vaccinium vitis-idaea

Methods:	Plots were setup either in June 1980 (Toolik Acidic Tussock site), June 1989 (LTER Toolik Shrub site) or in July 1996 (LTER Non Acidic site) with annual fertilization treatments of 10 g/m2 Nitrogen (as NH4NO3) and 5 g/m2 Phosphorous (as triple superphosphate). Calculations: See variable description. Sampling Description. Sites and Species Collected Toolik Acidic Tussock 1981 plots (acidic soil)-Fertilized Blocks 1,2,3,4 -Betula nana -Rubus sp. -Arctagrostis sp. -Eriophorum vaginatum Toolik Acidic Tussock 1981 plots (acidic soil)-Control Blocks 1,2,3,4 -Betula nana -Ledum sp. -Vaccininum vitis-idea -Eriophorum vaginatum LTER Non-Acidic Site (non-acidic soil)-Fertilized Blocks 1,2,3 -Eriophorum vaginatum -Cassiope sp. -Carex sp. -Dryas LTER Non-Acidic Site (non-acidic soil)-Control Blocks 1,2,3 -Eriophorum vaginatum -Cassiope sp. -Carex sp. -Dryas LTER Toolik Shrub / Riparian Site -Betula nana -Salix sp. The following procedures are arranged in order of species and include the protocol conducted in the field and in the lab. The sampling methods common to all species are as follows: A 20-meter transect was placed along the margin of each site. Five random numbers were generated using a stopwatch. These numbers were used to locate five points along the transect, thus, five samples of each species were collected per site if they occurred there. Leaf Area (LA) was measured using the Win-Rhizo Scanning System, a scanner converted to measure leaf area. After LA measurements were taken, samples were placed into coin envelopes and left to dry in an oven at 60øC for 2-5 days. The samples were then weighed and sealed in coin envelopes. The dry-weight of each sample is written on the outside of the envelope in units of grams. Betula nana: New, long, non-flowering stems closest to the five random marks were collected. The long-stem was clipped just below the most apical short-stem so that short-stem leaves could be included in the survey. In the lab, short-stem leaves were removed from the stem and scanned for LA. Long-stem leaves were then removed and scanned for LA. The long-stem was cut to include only this year's growth. Short-stem leaves, long-stem leaves, and stems were each put into separate coin envelopes for drying and weighing. Eriophorum vaginatum: A non-flowering tiller was chosen closest to each of the five random marks. Tillers were cut to include the rhizome, which was later discarded. In the lab the sheath of each tiller was removed and leaves were separated. Often, the leaves were cut into pieces to make them more manageable. The leaves were then scanned for LA, dried, and weighed. Ledum sp.: Non-flowering stems were collected at each of the five random marks. Stems were clipped below the lowest (oldest) living leaves on the stem. In the lab, new growth was separated from old growth along the stem. New leaves were removed and scanned for LA. Old leaves were removed and scanned for LA. New and old leaves were placed into separate envelopes, dried, and weighed. Vaccinium vitis-idea: Non-flowering stems were collected from each of the five random marks. The stem was clipped to include the oldest living leaf. In the lab, new growth was separated from old growth. New leaves were scanned for LA. Old leaves were scanned for LA. New and old leaves were placed into separate envelopes, dried, and weighed. Rubus sp.: Non-flowering stems were collected from each of the five random marks. The stem included the rhizome, which was later discarded. In the lab, leaves were removed from the stem and scanned for LA. During scanning, the leaves of Rubus were compressed with a transparency so that the scanner would measure the entire leaf. Leaves were dried and weighed. Arctagrostis sp.: Non-flowering tillers were collected from each of the five random marks. Tillers were harvested to include the rhizome, which was later discarded. In the lab, the sheath was removed from each of the tillers and the blades were often cut into more manageable pieces. The blades were often compressed with a transparency during scanning. The blades were scanned for LA, dried, and weighed. Cassiope sp.: Non-flowering stems were collected from each of the five random marks. The stem was clipped below the oldest, living leaf. In the lab, old growth was separated from new growth along the stem and measured for LA separately. Cassiope was not separated into leaves and stems for each harvest. A regression was redeveloped between leaf area of separated leaves and area of intact stems for both new and old growth. This correct was then applied to subsequent harvests. New and old leaves were placed into separate envelopes, dried, and weighed. Carex sp.: Non-flowering tillers were harvested from each of the five random marks. The tillers were removed to include the rhizome, which was later discarded. The sheath of each tiller was removed and the blades were often cut into more manageable pieces. The blades were often compressed with a transparency during scanning. The blades were measured for LA, dried, and weighed. Dryas sp.: Non-flowering stems were collected from each of the five random marks. Stems were clipped to include the rhizome, which was later discarded. Leaves were removed from the stem and scanned for LA, dried, and weighed. Salix sp.: Non-flowering stems were collected from each of the five random marks. Leaves were removed from the stem and often compressed with a transparency during scanning. Leaves were scanned for LA, dried, and weighed. Miscellaneous Notes Harvests were conducted approximately every 10 days and lasted about 4 days.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Date of harvest.	datetime		dd-mmm-yyyy
Site	Site of harvest. See methods for description.	text
Treatment	Experimental treatment plot. See methods for description.	text
Block	Block number within the site.	text
Species	Species sampled	text
Class	Type of growth: new, old. Or for Betula whether a short shoot or long shoot.	text
Dry Weight (g)	Dry weight of leaf in grams.	number	gram			#N/A
Stem Weight (g)	Dry weight of stem in grams	number	gram			#N/A
Leaf Area (cm2)	Leaf area of leaves harvested in	number	centimeterSquared			#N/A
Leaf Area (m2)	Leaf area of leaves harvested in	number	gramPerFourHundredthMeterSquared			#N/A
# of leaves	Number of leaves harvested.	number	number			#N/A
LMA (g/m2)	Mass of leaves divided area of leaves in	number	gramPerMeterSquared			#N/A
leaf mass / # leaves (g/#)	Mass of leaves divided by number of leaves.	number	gramPerNumber			#N/A
leaf area / # leaves (m2/#)	Area of leaves divided by number of leaves	number	meterSquaredPerNumber			#N/A

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