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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:

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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 

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.

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Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data, Dataset via LTER Data Poral
Dataset ID:2010_EVRT1980_Gas_Exchange_Means.03
Dataset Title:Light-saturated photosynthetic rate, dark respiration, stomatal conductance and ratio of internal to external CO2 concentration from the 1980-82 Eriophorum vaginatum reciprocal transplant experimental plots from Eagle Creek to Prudhoe Bay, Alaska, 2010.
Investigator 1: 
First Name:Ned
Last Name:Fetcher
Organization:Wilkes University
Address line 2:Institute for Environmental Science and Sustainability
Address line 3:84. W. South St.
Zip Code:18766
Investigator 2: 
First Name:James
Last Name:McGraw
Organization:West Virginia University
Address line 2:Department of Biology
Address line 3:53 Campus Drive
Zip Code:26505
Investigator 3: 
First Name:Gaius
Last Name:Shaver
Organization:Marine Biological Laboratory
Address line 2:The Ecosystem Center
Address line 3:
City:Woods Hole
Zip Code:02543
Investigator 4: 
First Name:Sara
Last Name:Souther
Organization:University of Wisconsin-Madison
Address line 2:Botany Department
City:Madison, WI 53706
Zip Code:53706
Associate Investigators:
Keywords:photosynthesis, dark respiration, respiration, stomatal conductance, Ci/Ca, Amax, gas exchange, internal CO2, 1980 Eriophorum vaginatum transplant experiment, reciprocal transplant, populations
Abstract:These data were collected in July 2010 for tussocks transplanted in 1980-82 in a reciprocal transplant experiment and harvested in 2011. Important variables are garden name, source population, light-saturated photosynthetic rate, dark respiration, stomatal conductance and ratio of internal to external CO2 concentration.
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
Online URL:
Data File URL
Data File Name 2010_EVRT1980_Gas_Exchange_Means
Beginning Date 7/12/2010
End Date 7/22/2010
Number of Data Records 387
Other Files to Reference 2010_EVTR1980_MassPerTiller.xlsx
Availability Status 1
Quality Control Information
Maintenance Description
Log of Changes: Version 1: Metadata entered and data checked NF, data uploaded to Pasta (Jan2014-JD)
Version 2: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 24Jan14
Version 3: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
RESEARCH LOCATION:                  
Location Name Eagle Creek Transplant Garden No Name Creek Transplant Garden Coldfoot Transplant Garden Toolik Lake Transplant Garden Sagwon Transplant Garden Prudhoe Bay Transplant Garden Select Site or enter New One Select Site or enter New One  
Geographic Description Eagle Creek Tussock Tundra Site on hillside above Eagle Creek at Mile 101 of the Steece Highway; garden is about 500 m upslope from an old berm created by bulldozer. Coordinates are approximate. Coordinates and elevation for all sites are from Google Earth. The garden is in the middle of giant tussocks 100 m north and 165 m west of the bridge that crosses No Name Creek on the Dalton Highway. Access is easier by going along No Creek for 165 m and then heading north. The garden is 100 m north of the edge of the forest and 190 m east of the Dalton Highway. The garden is in the complex of "historic sites" at Toolik Lake. The garden is 50 m north of the upper parking area at the Sagwon Overlook pulloff. Site formerly known as MS 127. The garden is 1.5 km west of the Kuparuk Bridge and 420 m north of the road on the east bank of a stream. Note: Permission from BP and oil field safety training required to access this site. Enter Description Enter Description  
Location Bounding Box                  
West Bounding Coordinate                  
East Bounding Coordinate                  
North Bounding Coordinate                  
South Bounding Coordinate                  
OR if single point location                  
Latitude 65.433665 66.116744 67.258973 68.629538 69.424431 70.328353 In Decimal Degrees In Decimal Degrees  
Longitude -145.514261 -150.169792 -150.169153 -149.579858 -148.709647 -149.062722 In Decimal Degrees In Decimal Degrees  
Elevation 762 167 319 759 269 8 In Meters In Meters  
Link to Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map      
Organisms studied Eriophorum vaginatum
Methods:In 1980-1982, six transplant gardens were established along a latitudinal gradient in interior Alaska from Eagle Creek, AK, in the south to Prudhoe Bay, AK, in the north (Shaver et al. 1986) .Three sites, Toolik Lake (TL), Sagwon (SAG), and Prudhoe Bay (PB) are north of the continental divide and the remaining three, Eagle Creek (EC), No Name Creek (NN), and Coldfoot (CF), are south of the continental divide. Each garden consisted of 10 individual tussocks transplanted back to their home-site, as well as 10 individuals from each of the other transplant sites (n = 10; 6 populations x 6 sites x 10 replicates = 360 total individuals).

Gas exchange was measured with an LI-6400 Portable Photosynthesis System (LiCor, Inc., Lincoln, NE, USA). Six leaves from each tussock were placed across a 2 x 3 cm cuvette that was equipped with an LED light source (6400-02B, LiCor, Inc., Lincoln, NE, USA). After measurement, width of each leaf was measured with a comparator. Leaf area was calculated as the sum of the leaf widths (cm) times the length of leaves that were in the cuvette (2 cm). Afterwards the portions of the leaves that were in the cuvette wre dried for 24 hr at 65 C and weighed. For measurements of light saturated photosynthetic rate (AMAX), cuvette conditions were set to 380 ppm CO2, 15░C, 1500 Ámol m-2 s-1 PPFD, and 40-70% relative humidity. After 10 measurements of AMAX, the light was switched off and 10 measurements of dark respiration (RESP) were made at 15░C after waiting 1 minute. The median

For AMAX and RESP measured on both leaf area and dry mass basis the 10 measurements were averaged to produce a mean value for each tussock. The median value of the 10 measurements wasc calculated. Mean and median values for the stomatal conductance and the mean ratio of internal to external CO2 concentration were also calculated.

Shaver GR, Fetcher N, Chapin FS (1986) Growth and flowering in Eriophorum vaginatum - Annual and latitudinal variation. Ecology 67:1524-1535

Funding for this research was provided by National Science Foundation grant ARC-0908936 with additional support from NSF-BSR-9024188.
AMAX and RESP data are incorporated in a ms. submitted to Botany. Stomatal conductance and internal CO2 data are still unpublished.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Garden Name of the transplant garden: EC, Eagle Creek; NN, No Name Creek; CF, Coldfoot; TL, Toolik Lake; SAG, Sagwon; PB, Prudhoe Bay text     EC= Eagle Creek| NN=No Name Creek| CF=Coldfoot| TL=Toolik Lake| SAG=Sagwon| PB=Prudhoe Bay  
Source Name of the source population: EC, Eagle Creek; NN, No Name Creek; CF, Coldfoot; TL, Toolik Lake; SAG, Sagwon; PB, Prudhoe Bay text     EC= Eagle Creek| NN=No Name Creek| CF=Coldfoot| TL=Toolik Lake| SAG=Sagwon| PB=Prudhoe Bay  
Tussock Number of tussock number dimensionless      
MeasType Type of measurement; Photosynthesis (positive values) or respiration (negative): AMAX, Light-saturated photosynthesis; RESP, Dark respiration text        
System Owner of LI-6400 system used for the measurement: WVU, West Virginia University; MBL, Ecosystem Center, Marine Biology Laboratory; ITEX, 2nd system belonging to Ecosystem Center and used for ITEX project text        
Date Date of measurement datetime   dd-mmm-yyyy    
MeanGasEx/Area Mean of 10 measurements of AMAX or RESP per unit fresh leaf area number micromolePerMeterSquaredPerSecond      
MedianGasEx/Area Median of 10 measurements of AMAX or RESP per unit fresh leaf area number micromolePerMeterSquaredPerSecond      
MeanGasEx/Mass Mean of 10 measurements of AMAX or RESP per unit dry leaf mass number nanomolePerGramPerSecond      
MeanConductance Mean of 10 measurements of stomatal conductance number molePerMeterSquaredPerSecond      
MedianConductance Median of 10 measurements of stomatal conductance number molePerMeterSquaredPerSecond      
MeanCi/Ca Mean of 10 measurements of ratio of internal CO2 to external CO2 number dimensionless      
GardenMeanGasEx/Area Mean of AMAX/Area or RESP/Area for each Garden number micromolePerMeterSquaredPerSecond      
N_Obs/GardenMean Number of observations for garden means number dimensionless      
GardenMeanGasEx/Mass Mean of AMAX/Mass or RESP/Mass for each Garden number nanomolePerGramPerSecond      

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