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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:LTEROksBenthicPPCN.02
Dataset Title:Benthic particulate carbon, nitrogen and phosphorus data from the Oksrukuyik Creek, near Toolik Field Station, Alaska, summers from 1994 to present.
Investigator 1: 
First Name:Breck
Last Name:Bowden
Organization:University of Vermont
Address line 2:303D Aiken Center
Address line 3:Rubenstein School of Environment and Natural Resources
City:Burlington
State:Vermont
Zip Code:05405
Country:USA
Investigator 2: 
First Name:Bruce
Last Name:Peterson
Organization:Marine Biological Laboratory
Address line 2:7 MBL St.
Address line 3:The Ecosystems Center
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 3: 
First Name:Linda
Last Name:Deegan
Organization:Marine Biological Laboratory
Address line 2:7 MBL St.
Address line 3:The Ecosystems Center
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 4: 
First Name:Alex
Last Name:Huryn
Organization:University of Alabama
Address line 2:
Address line 3:
City:Tuscaloosa
State:AL
Zip Code:
Country:USA
Investigator 5: 
First Name:Elissa
Last Name:Schuett
Organization:University of Vermont
City:Burlington
State:Vermont
Country:USA
Investigator 6: 
First Name:Adrian
Last Name:Green
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 7: 
First Name:Karie
Last Name:Slavik
Associate Investigators:
Keywords:particulate carbon, particulate nitrogen, particulate phosphorus, Oksrukuyik Creek, benthos, inorganic nutrients, streams, arctic streams
Abstract:Benthic samples were analyzed for particulate carbon, nitrogen, and phosphorus. Samples from designated stations from the Oksrukuyik Creek were collected during each summer from 1994 to current time.
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.10508&urlTail=streams/stream_chemistry/data/1994-2012_Oksrukuyik_BenthicParticulates.csv
Data File Name 1994-2012_Oksrukuyik_BenthicParticulates
Beginning Date 6/20/1994
End Date 8/6/2012
Number of Data Records 230
Other Files to Reference
Availability Status 1
Quality Control Information Check Standards, Sample Replicates.
Maintenance Description Ongoing data collection.
Log of Changes: 3/2013: EBS organized metadata and data into this file; 4/2013: JPB moved to new spreadsheet and updated Research Locations 1/2014: JPB updated spreadsheet with 2011+2012 data.
Version 1: Keywords updated and file prepared for online (JD-17Jan2014)
 
RESEARCH LOCATION:            
Location Name Oksrukuyik -0.1k Oksrukuyik -0.3k Oksrukuyik -0.7k Oksrukuyik 1.37k Wolf Creek  
Geographic Description Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach. Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach. Oksrukuyik Creek, North Slope of Alaska, reference reach, upstream of the formerly fertilized reach. Oksrukuyik Creek, North Slope of Alaska, recovery reach, formerly fertilized reach. Tributary of Oksrukuyik Creek, North Slope of Alaska.  
Location Bounding Box            
West Bounding Coordinate            
East Bounding Coordinate            
North Bounding Coordinate            
South Bounding Coordinate            
OR if single point location            
Latitude 68.671486222 68.671371694 68.67101801 68.679780992 68.670296  
Longitude -149.1281271 -149.131155484 -149.137892686 -149.114206438 -149.127474  
Elevation 761.756 763.881 764.537 762.678    
Link to Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map  
             
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:Benthic particulate carbon, nitrogen, and phosphorus were sampled using either a "2x2" or "whole rock" scrubbing method.
2x2 method: Benthic particulates were sampled three times on rocks from
riffles. Using a plastic 35mm slide mount to partition a known
area, the algae was scraped from the rock surface with a brass
brush. The brushed area of the rock, the brush and slide holder
were then rinsed and the slurry collected and brought up to a
volume of 56 ml. Five rocks were sampled from each riffle
station.
Whole rock method: Whole rock samples were also collected from riffles.
The upper surface of rocks fitting into an area of 546cm^2 ( +/- 18cm) (363 cm2 ( +/- 18cm) in 1996) were scrubbed with a brass brush.
The slurry was brought to a volume of 1 L.The samples were returned to the lab
where they were filtered through a GF/C or GF/F glass fiber filter and dried for 24 hours in a 60oC oven. The samples were shipped for future analysis.
Particulate Carbon and Nitrogen:
The PE2400 CHN uses a combustion method to convert the sample elements to the simple gases (CO2, H2O, and N2). The sample is first oxidized in a pure oxygen environment; the resulting gases are then controlled to exact conditions of pressure, temperature, and volume. Finally, the product gases are separated. Then, under steady-state conditions, the gases are measured as a function of thermal conductivity. A known standard is first analyzed to calibrate the analyzer in micrograms. The calibration factor is then used to determine unknowns. All quantitation is performed on a weight percent basis, using a gravimetric technique. The systems uses a steady state, wavefront chromatographic approach to searate the measured gases. This approach involves separating a continuous homogenized mixture of gases through a chromatographic column. As the gases elute, each gas
separates as a steady state step, with each subsequent gas added to the previous one. Consequently, each step becomes the reference for the subsequent signal.
Particulate Phosphorus:
Particulate matter collected on a glass fiber filter is ignited at low temperature to destroy organic matter. The ignited filter is heated with dilute HCl, which extracts the phosphorus and converts it to ortho-phosphate. The phosphorus is then analyzed by a version of the reactive phosphorus method.

Samples from 1991 to 2010 were analyzed at the MBL. Samples 2011 to present were sent to the University of Vermont and analyzed for PP at the Rubenstein Ecosystem Research Laboratory, and PCN at the Jeffords Plant and Soil Science Building.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
LTER Site Code LTER Site Code text        
River River Name text        
Date Date datetime   dd-mmm-yy    
Station (km) Station on river in km from 1983 dripper. See comments for additional information text        
Treatment Treatment reach based on the location of the dripper from 1991 to 1996. text        
Type Type of Benthic Sample text        
PP (ug/cm^2) Benthic Particulate Phosphorus number microgramPerCentimeterSquared     -1111=no data ; -9999=below detection limit'
PN (ug/cm^2) Benthic Particulate Nitrogen number microgramPerCentimeterSquared     -1111=no data ; -9999=below detection limit'
PC (ug/cm^2) Benthic Particulate Carbon number microgramPerCentimeterSquared     -1111=no data ; -9999=below detection limit'
Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.