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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:

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 via LTER Data Poral
Dataset ID:1989plantspecies.06
Dataset Title:Vascular plant species list, Skip Walker's Toolik Lake permanent plot species data, Toolik Lake Field Station, North Slope, AK Arctic LTER 1989.
Investigator 1: 
First Name:Donald
Last Name:Walker
Organization:Institute of Arctic Biology
Address line 2:University of Alaska Fairbanks
Address line 3:
City:Fairbanks
State:AK
Zip Code:99775
Country:
Investigator 2: 
First Name:N.C.
Last Name:Barry
Organization:
Address line 2:
City:
State:
Zip Code:
Associate Investigators:
Keywords:species diversity, species richness, species lists, populations
Abstract:Vascular plant species list, Skip Walker's Toolik Lake permanent plot species data
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.1420&urlTail=terrest/plantinfo/data/1989plantspecies.csv
Data File Name 1989plantspecies
Beginning Date 8/23/1989
End Date 9/1/1989
Number of Data Records 765
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Version 2: Added title and atrribute information. 4Oct06 JL.
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 5: Updated metadata form to newer version (without site sheet). Fixed discrepency with header variable names. CH 25Jan2013 Updated to newer metadata with site sheet. CH March 2013.
Version 6: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 17Feb14
 
RESEARCH LOCATION:                                            
Location Name Skip Walker's Toolik Plot Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One Select Site or enter New One  
Geographic Description Skip Walker's Toolik Lake permanent plot near Toolik Lake research site, located in the northern Arctic Foothills of the Brooks Range, Alaska (68 deg. 37' N, 149 deg. 37' W). See http://arcss.colorado.edu/data/arcss.html for map of plots Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description Enter Description 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 68.626 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.616 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map                                          
                                             
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:This species data is extracted from a report on a summary of environmental,
soil, and vegetation information collected from 81 study plots at the Toolik
Lake research site, located in the northern Arctic Foothills of the Brooks
Range, Alaska (68 deg. 37' N, 149 deg. 32' W). It brings together for easy
reference all the available information collected from the plots. This
information is being used for the classification, mapping and analysis of the
geobotanical factors in the Toolik Lake and Imnavait Creek region. A separate
equivalent data report is available for 71 permanent plots at Imnavait Creek
(Walker et al., 1987).
Methods and data summaries
Reconnaissance survey, sampling dates, and plot locations
A reconnaissance survey was conducted in August 1988 to define the primary
vegetation types in the Toolik Lake area. Unknown plants were collected and many
informal partial releve were sampled with reference to spectral signatures on a
1:50,000-scale color-infrared photograph. A total of 22 preliminary vegetation
types were defined based on habitat and dominant species (Table 1).
Formal releve sampling for the plots in this data report was done during
the period 1-26 August 1989. An attempt was made to sample at least three
releve for each of the types defined in 1988, but this was not possible in all
cases (Tables 1 and 2).
The plots were located in homogeneous areas of vegetation using the
centralized replicate method of the Braun-Blanquet approach to vegetation
classification (Mueller-Dombois and Ellenberg, 1974; Westhoff and van der
Maarel, 1978).
Nearly all of the plots are permanently marked. The exception is plot
SWT-55. The plots are marked with 48-inch (122-cm) wooden stakes, and aluminum
tags at the base of the stakes with the plot numbers. Some of the stakes have
broken off since sampling. We intend to replace all of
the wooden stakes with tall plastic stakes.
Forty of the plots are located along transects as follows:
1. West-facing toposequence of Itkillik II glacial outwash and
retransported hillslope deposits on the south side of Toolik Lake: (from top of
hill) SWT-7, 8, 9, and 10.
2. East-facing toposequence of slope that includes Itkillik I and Itkillik
glacial till and retransported hillslope deposits on the south side of Toolik
Lake: SWT-18, 19, 20, 21, 22, 24, and 77.
3. South-facing toposequence on Itkillik II till and retransported
hillslope deposits on the west side of Toolik Lake: SWT-46, 45, 44, 41, 40, 43,
39, 42, 38, and 37. These are in mixed positions on stone-stripes and inter-
stripe sites. Plots 38 and 37 are in a colluvial basin at the base of the hill.
4. North-facing toposequence on Itkillik II till and retransported
hillslope deposits: SWT-48, 47, 49, 50, 51, 52, 53, 54 and 81. Plot SWT 48 is
on a ground- squirrel mound, and most of the sequence is through a deep
snowbed.
5. Water-track transect on the south side of Toolik Lake: SWT-80, 32, 35,
75, 78, 27, 79, 36, 73, 74, 64. Plots SWT-80, 35, 74, and 64 are on frost
scars.
The remaining plots were located around Toolik Lake to sample the diversity
of vegetation types of the region (Figure 1, Table 2).
Sampling methods
Plot size, species cover estimation, and photographs
The plots have no fixed size because our main objective was to obtain
a complete species list for each relief.
Photographs were taken of each plot (see Appendix). Usually photos
were taken of (1) the general site, (2) close-up of the vegetation, and (3)
closeup of the soil.
Site factors
The site of each plot was described according to the variables listed
in Table 3 plus measurements of thaw depth, estimates of cover of bare soil,
rocks, and the major plant growth forms. These data are summarized in Table 4.
Soils
Field sampling
Soil pits were dug adjacent to the plots and described and
classified according to the U.S. soil taxonomy [Soil Survey Staff, 1975]. Soil
samples were collected from each horizon and air dried in the laboratory. Bulk
density and soil moisture samples were taken from the sides of the soil pits or
from large soil plugs for the wet soils using a 240-ml soil can.
Laboratory analysis
Laboratory analyses were conducted at the Colorado State
University Soil Testing Laboratory, Fort Collins. The laboratory's routine
analysis was run on all samples [pH (saturated paste); NO3 (KCl extract); P, K,
Zn, Fe, Cu, Mn (NH4HCO3-DTPA extract); lime estimate, texture estimate (by
hand); and organic matter (Walkley-Black or ash method). Selected samples were
analyzed for cation exchange capacity (C.E.C.); percentage gravel; particle size
(hydrometer method), CaCO3 equivalent; Ca, Mg, Na, K (NH4OAc extract); and soil
moisture retention (field capacity at 1/3 BAR and permanent wilting point at 15
BAR). These methods are described in Page et al. (1982) and Klute (1986). The
soils data are in Table 5.
Vegetation
A large area surrounding each plot marker was searched until no new
species were encountered. Estimates of vegetation cover used the Braun-Blanquet
cover-abundance scale (r = rare; + = common but less than 1% cover; 1 = 1-5%; 2
= 6-25%; 3 = 25-50%; 4 = 51-75%; 5= 76-100%). Cover-abundance values are
relatively broad subjective classes, and were determined by estimating cover
within the general area of the stake. Voucher collections were made for all
vascular plants, bryophytes, and lichens occurring in the plot. Vascular plants
were verified by Dr. Dave Murray, University of Alaska Herbarium. Bryophytes
were verified by Dr. Dale Vitt, University of Alberta. Lichens were verified by
Dr. Joanne Flock at the University of Colorado Herbarium. Table 6 contains the
raw species data.

Acknowledgments
This work was funded by the Department of Energy's R4D (Response, Resistance,
and Resilience to, and Recovery from Disturbance in arctic ecosystems)
(Grant No. DE-FG02-84ER60242.A006). Curt Westburg, Nancy Auerbach, and
Marilyn Walker assisted in the field. Liz Arnold, Diane Andrews, Nan Lederer,
Leanne Lestak, and Diane Lorenz assisted with the preparation of this report.

Notes: The tables and figure can be found in the full report which is available online
at http://arcss.colorado.edu/data/arcss.html.

Reference Citations: Klute, A. 1986. Methods of soil analysis, Part 1. Physical and
mineralogical methods. Agronomy Series, No. 9, American Society of
Agronomy, Inc.. and Soil Science Society of American, Inc.
Madison, WI, 1188 pp.
Mueller-Dombois, D. And H. Ellenberg. 1974. Aims and methods of
vegetation ecology. New York: John Wiley and Sons, 547 pp.
Page, A.L., R.H. Miller, and D.R. Keeney (Eds.) 1982. Methods of soil
analysis, Part 2. Chemical and microbiological properties. Agronomy
Series, No. 9, American Society of Agronomy, Inc.. and Soil Science
Society of American, Inc. Madison, WI, 1159 pp.
Soil Survey Staff. 1974. Soil taxonomy of the National Cooperative
Soil Survey. Soil Conservation Service, U.S. Department of Agriculture,
754 pp.
Walker, D.A., N.D. Lederer, and M.D. Walker. 1987. Permanent vegetation plots:
site factors, soil physical and chemical properties, and plant species cover.
Data report for R4D Program, U.S. Department of Energy.
Westhoff V. and E. van der Maarel. 1978. The Braun-Blanquet approach. In:
Whittaker, R.H. (Ed.) Classification of plant communities.
Boston: Junk, pp. 617-726.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Growth Form Classification as to the plants growth form. text        
Species Name Latin name of the plant text        

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