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:	1999gsexclosbm.08
Dataset Title:	Plant biomass in moist acidic tussock tundra experimental small mammal exclosures, 1999 Arctic LTER Toolik, Alaska.
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
Associate Investigators:
Keywords:	Alaska, biomass, tundra, small mammal, exclosures, primary production, disturbance, inorganic nutrients, organic matter, populations
Abstract:	Above ground plant and below ground stem biomass was measured in Arctic LTER tussock tundra experimental small mammal exclosures. Treatments included Control, Nitrogen plus Phosphorus with both fenced and unfenced plots. In addition a moist non-acidic tussock tundra site was harvested. Leaf areas were also measured for each quadrat but are in a separate file.
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.1386&urlTail=terrest/biomass/data/1999gsexclosbm.csv
Data File Name	1999gsexclosbm
Beginning Date	7/24/1999
End Date	8/3/1999
Number of Data Records	412
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes:
	Version 4: Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006 Jiml
	Version 5: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
	Version 6: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 7: Updated the metadata form to new version and eml to 2.1.0 JimL 9Jul2012
	Version 8: Added notes about "lumped species" to new "Species Comments" column. Taxonomic coverage data updated. Updated metadata to newer form (with sites sheet). CH March 2013.

RESEARCH LOCATION:

Location Name

Toolik

Select Site or enter New One

Geographic Description

Toolik Lake (68 degrees 38'N, 149 degrees 34'W, elevation 760 m) Moist Acidic Tussock Tundra.

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.62405

In Decimal Degrees

Longitude

-149.61058

In Decimal Degrees

Elevation

719

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied	Andromeda polifolia; Betula nana; Carex bigelowii; Cassiope tetragona; Empetrum nigrum; Eriophorum vaginatum; Ledum palustre; Lichens spp.; Polygonum spp.; Rubus chamaemorus; Salix spp.; Sphagnum spp.; Vaccinium uliginosum; Vaccinium vitis-idaea

Methods:	Exclosure plots were setup in July 1996 on extra 5 x 20 meters plots within the four block design of the 1989 LTER acidic tussock experimental plots. On each plot a 5x10 meter section was fenced with large mesh (4-inch square mesh) and within this fence a 5x5-meter plot was fenced with a small mesh (1/2-inch square mesh). In each block two fenced plots were setup: a plot with no fertilizer and a plot with annual fertilization (NP) treatments of 10 g/m2 Nitrogen (as NH4NO3) and 5 g/m2 Phosphorous (as triple superphosphate). In this biomass harvest only the control unfenced, control small mesh, NP unfenced, and NP small mesh treatments were sampled. In addition controls in a non-acidic moist tussock site with a 3-block design were sampled. SAMPLING TECHNIQUES Biomass quadrats, size 20x20 cm, were taken from Toolik tussock site. Five quadrats were taken from each of four blocks. All aboveground biomass was clipped in 20x20 cm quadrats. Five quadrats were randomly located along line transects in each of four replicate blocks in each treatment. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Quadrats were sorted within 24 hours into species and then into tissue type. Depending on the harvest, tissue types can be broad categories, i.e. above and below, or more detailed, i.e. inflorescences, new growth, old growth, etc. Leaf area was measured with a LiCor LI-3000A area meter. Leaf areas for graminoids, deciduous, and forbs were measured immediately after plucking and before drying. Leaf areas for Evergreen species (except Ledum) were measured after drying for 2-4 days. Leaf areas for Ledum were measured after final dry weights were done. Cassiope leaf areas were measured on the unseparated leaves and stems. The samples were dried at 60 degrees C in a drying oven and after several days weighed to nearest milligram. Samples are then returned to Woods Hole for nutrient mples were dried at 60 degrees C in a drying oven and after several days weighed to nearest milligram. Samples are then returned to Woods Hole for nutrient analysis. Details are given in Shaver and Chapin (Ecological Monographs, 61(1), 1991, pg. 1.). Note Only 3 blocks were sampled from the fertilized treatments. Cassiope was not separated into leaves and stems. Weights for Cassiope were recorded as leaf weights or as stem weights. No leaf area was measured on Cassiope Calculations: Units; Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2. Leaf blade area are in cm2/quadrat. Multiply by .0025 to get m2 leaf/m2 ground.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Date of sampling in ddmmyyyy	datetime		dd-mmm-yyyy
Site	Tundra site of sampling	text
Treatment	Plot treatment	text
Growth Form	Growth form of species	text
Species	Species Note: Only the major species were weighed separately. All other species were lumped under the "Other" category. The category "Comments has notes on the species lumped.	text
Tissue	Tissue type	text
Biomass type	Category of plant growth: new above, old above, old below, non-vascular. Note: Comments category has notes on species found and not weighed separately but lumped under "Other species".	text
B1Q1	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B1Q2	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B1Q3	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B1Q4	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B1Q5	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B2Q1	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B2Q2	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B2Q3	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B2Q4	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B2Q5	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B3Q1	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B3Q2	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B3Q3	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B3Q4	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B3Q5	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B4Q1	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B4Q2	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B4Q3	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B4Q4	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
B4Q5	oven dried weight (gm) of sample collected in a quadrat	number	gramPerFourHundredthMeterSquared			na
Average	Average of all quadrats for that species and tissue type.	number	gramPerFourHundredthMeterSquared			na
Std. Err.	Standard Error of the mean for species and tissue type.	number	gramPerFourHundredthMeterSquared			na
Count	Number of quadrats	number	number			na
B1Q1gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B1Q2gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B1Q3gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B1Q4gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B1Q5gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B2Q1gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B2Q2gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B2Q3gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B2Q4gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B2Q5gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B3Q1gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B3Q2gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B3Q3gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B3Q4gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B3Q5gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B4Q1gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B4Q2gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B4Q3gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B4Q4gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
B4Q5gm2	oven dried weight (gm) of sample converted to g/m^2	number	gramPerMeterSquared			na
Average g/m^2	Average of all quadrats expressed as g/m2	number	gramPerMeterSquared			na
StdERR g/m^2	Standard error of the mean in g/m2.	number	gramPerMeterSquared			na
Count g/m^2	count of quadrats	number	number			na
Species Comments	Notes on lumped species categories.	text
Comments	Comments about individual samples.	text

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