Arctic LTER

Weather at Toolik

Arctic LTER Database

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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

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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.

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Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	2004-2009gscoversp.08
Dataset Title:	Plant % cover by species for the ITEX CO2 flux survey plots at Toolik, Alaska; Abisko, Sweden; Svalbard, Norway; Zackenberg, Northeast Greenland; and Barrow, Alaska 2004-2009
Investigator 1:
First Name:	Gus
Last Name:	Shaver
Organization:	The Ecosystems Center
Address line 2:	Marine Biological Laboratory
Address line 3:	7 MBL Street
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Investigator 2:
First Name:	Mark
Last Name:	van Wijk
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Lorna
Last Name:	Street
Investigator 4:
First Name:	Brooke
Last Name:	Kaye
Investigator 5:
First Name:	Jim
Last Name:	Laundre
Investigator 6:
First Name:	Mathew
Last Name:	Williams
Investigator 7:
First Name:	Cath
Last Name:	Thompson
Investigator 8:
First Name:	Carrie
Last Name:	McCalley
Investigator 9:
First Name:	Beth
Last Name:	Bernhardt
Investigator 10:
First Name:	Bob
Last Name:	Douma
Investigator 11:
First Name:	Celine
Last Name:	Ronfort
Investigator 12:
First Name:	Kerry
Last Name:	Dinsmore
Investigator 13:
First Name:	Robert
Last Name:	Bell
Investigator 14:
First Name:	Peter
Last Name:	van Buuren
Investigator 15:
First Name:	Craig
Last Name:	Menzies
Investigator 16:
First Name:	Jen
Last Name:	Peters
Investigator 17:
First Name:	Scott
Last Name:	Graham
Associate Investigators:
Keywords:	ITEX flux survey, percent cover, plant species, populations
Abstract:	Estimated aerial plant % cover by species in flux plots measured during the ITEX circumarctic flux survey 2004-2006. Flux plots were located in the Toolik Lake LTER fertilization experiment in Alaska; at Imnavait Creek, Alaska; at Paddus, Latnjajaure and the Stepps site near Abisko in northern Sweden; at various sites in Adventdalen, Svalbard; in the Zackenberg valley, Northeast Greenland; at BEO near Barrow, Alaska and at the Anaktuvuk River Burn in Alaska.
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.1607&urlTail=terrest/tracegas/data/2004-2009gscoversp.csv
Data File Name	2004-2009gscoversp.dat
Beginning Date	6/28/2004
End Date	8/17/2009
Number of Data Records	2756
Other Files to Reference
Availability Status	Type 1
Quality Control Information
Maintenance Description
Log of Changes:	Version 1: Checked file and created eml and html files. Feb 2006 Jiml Version 2: Added Zackenberg 2006 cover data and updated metadat.txt with new site description, references, files to reference etc. Added a new identifier column called "plot size" because 2006 data include measurements made on 0.3m x 0.3m plots. Changed date in file name from 2005 to 2006. Oct 2006 LStreet
	Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
	Version 4: Updated LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
	Version 5: Added Toolik and Barrow 2009 data. Changed file name from 2006 to 2009.
	Version 6: Updated the metadata form and eml is 2.10 JimL Nov12
	Version 7: Updated to newer metadata with site sheet. CH March 2013.
	Version 4: Corrected eml excel file name wrong extension. JimL 16May13

RESEARCH LOCATION:

Location Name

Toolik

Imnavait Creek

Abisko Stepps

Abisko Paddus

Abisko Latnjajare

Adventdalen Svalbard, Norway

Zackenberg Greenland

Barrow Alaska

Anaktuvuk River Burn

Select Site or enter New One

Geographic Description

Toolik Lake (68 degrees 38N, 149 degrees 34W)

Imnavait Creek (68 degrees 37N, 149 degrees 18W) Alaska, U.S.

"Stepps" site (68 degrees 18N, 18 degrees 51E) near Abisko, Sweden.

Paddus (68 degrees 19N, 18 degrees 51E) near Abisko, Sweden.

Latnjajaure (68 degrees 21N, 18 degrees 30E) near Abisko, Sweden.

Adventdalen (78 degrees 13N, 15 degrees 38E) Svalbard, Norway.

Zackenberg research area zone 1a (74º28’ N, 20º34’ W), Northeast Greenland.

Barrow ( 71° 18' N, 156° 36' W) Alaska, USA.

Anaktuvuk River Burn (68° 56-59' N, 150° 12-16' W) Alaska, USA.

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

68.6167

68.3

68.3167

68.35

78.2166666666667

74.4666666666667

71.31

68.9

In Decimal Degrees

Longitude

-149.61058

-149.31

18.85

18.5

15.6333333333333

-19.4333333333333

-156.6

-150.2

In Decimal Degrees

Elevation

719

884

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	RESEARCH LOCATIONS: Imnavait Creek, Alaska 2004: cover estimates were made once on the 15 flux plots along the topographic sequence of the west facing slope of Imnavait Creek catchment. Toolik Lake, Alaska 2004: cover estimates were made once on the 20 flux plots in treatment (N +P) and control blocks of the LTER terrestrial fertilization experiment at Toolik Lake, including the moist acidic tussock, non-acidic tussock, non acidic non-tussock, inlet wet sedge and heath sites. Abisko, Sweden 2004. Cover estimates were made once on the 11 plots at the Stepps site, 13 plots at Paddus and 12 plots at Latnjajaure. Abisko, Sweden 2005. Cover estimates were made on 15 flux plots at the Stepps site each time flux measurements were made (3 times through June/early July and once in mid August). Svalbard 2005. Cover estimates were made once on 41 flux plots at various sites in Adventdalen. Zackenberg 2006. Data were collected on 35 1 x 1m plots and 25 0.3 x 0.3m plots across a range of vegetation types. 13 of the 0.3 x 0.3m plots were located within 1m x 1m plots (identified by plot name with suffix "b1, b2 or b3"), the remainder were independent of the 1 x 1m plots (B14-25). Measurements were made from 8 July through 1 Aug 2006. Toolik, Alaska 2009: Data were collected on nine 1m x 1m flux plots, three in each vegetation type. Vegetation types included moist acidic tundra (MAT), dry heath (HTH) and wet sedge (WSG). Each plot was measured at approximately 2 weeks intervals from mid-June to mid-August 2009. Anaktuvuk River Burn, Alaska 2009: Data was collected on five 0.7m x 0.7m flux plots along a burn severity gradient during mid-June 2009. Barrow, Alaska 2009: Data was collected on thirteen 0.7m 0.7m flux plots along a moisture gradient during late-July to early-August 2009. EXPERIMENTAL DESIGN AND METHODS Absolute percent cover by species was estimated for each 1m x 1m ITEX flux plot (i.e. total cover can be > 100%). In 2004, we split the 1m x 1m flux plots into 25 sub plots using a grid, then estimated % cover in each of the sub plots individually and calculated an average. In 2005, 2006 and 2009 we used the same 1m x 1m grid but counted running totals of percentages of each species in squares 1 thru 25 (only the total cover for the flux plot is given). For the 0.3m x 0.3m plots in 2006 we estimated cover once for the plot as a whole. For the 0.7m x 0.7m plots in 2009 we used a smaller version of the same grid and counted the running totals of the percentages of each species' cover for the whole plot. Each spp is assigned to a growth form, abbreviated as follows: D = deciduous shrub E = evergreen shrub F = forb G = grass GRM = graminoid S = sedge/rush P = pteridophyte B = bryophyte (mosses and liverworts) L = lichen U = unclassified W = water R = rock X = litter or bare or crust ++ = plus other spp Where many graminoids were growing together it was often difficult to judge the individual percentages, so only the total for the growth form is given; the main species present are listed in the comments column. CALCULATIONS: none FOR MORE INFORMATION CONTACT: Gus Shaver, The Ecosystems Center, Woods Hole, MA, 02543, USA REFERENCE CITATIONS: Bay, C. (1998) Vegetation mapping of Zackenberg Valley Northeast Greenland. Danish Polar Center. Shaver, G.R., Street, L.E., Rastetter, E.B., van Wijk, M.T., Williams, M. (2007) Functional convergence in regulation of net CO2 flux in heterogeneous tundra landscapes in Alaska and Sweden. Journal of Ecology 95:802-817. Street, L.E., Shaver, G.R., Williams, M., van Wijk, M.T. (2007) What is the relationship between changes in canopy leaf area and changes in photosynthetic CO2 flux in arctic ecosystems? Journal of Ecology 95: 139-150. Williams, M., Street, L.E., van Wijk, M.T., and Shaver, G.R. (2006) Identifying Differences in Carbon Exchange among Arctic Ecosystem Types. Ecosystems 9:288-304.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
YEAR	Year of percent cover measurement	datetime		YYYY
DATE	Date of percent cover measurement	datetime		DD-MMM-YY
SITE	Abisko, Toolik, Svalbard, Zackenberg, Barrow, or AR Burn.	text
GROUP	Location of flux plots at each site	text
PLOT	Individual plot identifier	text
TREAT	Control or fertilised with N and P fertiliser	text
PHASE	Measurement series (round of measurement within each year)	text
PLOT SIZE	Plot size of 1m x 1m , 0.3m x 0.3m , or 0.7m x 0.7m	text
SPECIES CODE	6 letter species abbreviation, SEE "2003-2009gsspecieslist.xls"	text
FUNCT GROUP	functional group	text
COVER	average estimated cover	number	percent
COMMENTS	comments	text

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