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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 

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.


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 Portal
Dataset ID:2011-2012KupChamberDO.04
Dataset Title:Chamber Metabolism 2011-2012 Kuparuk River near Toolik Field Station Alaska.
Investigator 1: 
First Name:Michael
Last Name:Kendrick
Organization:University of Alabama
Address line 2:Box 870206
Address line 3:
Zip Code:35487
Investigator 2: 
First Name:Alexander
Last Name:Huryn
Organization:University of Alabama
Address line 2:Box 870206
Zip Code:35487
Associate Investigators:
Keywords:chamber metabolism, epilithic, gross primary production, respiration, streams, arctic streams, Kuparuk River
Abstract:Dissolved oxygen was measured in sealed chambers on representative river rocks periodically throughout the 2011 and 2012 open water season in the Kuparuk River. These data provide information on gross primary production and respiration from representative river rocks taken from 3 experimental reaches in the Kuparuk.
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 2011-2012KupChamberDO.csv
Beginning Date 6/11/2011
End Date 9/20/2012
Number of Data Records 6143
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Version 1: Package ID assigned and uploaded to web.
Version 2: 29Oct2013 - A. Huryn added as co-owner of data, and funding source added to methods section.
Version 3: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 15Jan14
Version 4: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015
RESEARCH LOCATION:                  
Location Name Kuparuk -0.177k Kuparuk 2.0k Kuparuk 0.5k 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 nutrients Kuparuk River at haul Rd. 1996-2010 phosphoric addition, 2011-present half-rate phosphoric addition 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 68.6431598416667 68.647526 68.6462288416667 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Longitude -149.403267013889 -149.411416 -149.409090213889 In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees In Decimal Degrees  
Elevation 746.552 731 742.04 In Meters In Meters In Meters In Meters In Meters  
Link to Google Map View on Google Map View on Google Map View on Google Map            
Organisms studied Diatoms, Mosses
Methods:Methods used were modified from Bowden et al. (1992) . Photosynthesis and respiration were estimated from linear estimates of change in oxygen within closed chambers during independent light and dark incubations (Bott et al., 1978; Pennak & LaVelle, 1979; King, 1982; Duff et al., 1984). Representative river rocks were placed in sealed Plexiglas chambers and slowly filled with river water prior to each incubation. Water was recirculated in the chamber with a stir-bar placed inside of the chamber and powered by a magnetic fans run on batteries on the outside of the chamber. A YSIŽ LDO probe was inserted into a port at the top of the chamber. Rocks were collected at random locations within riffles at each site. In a typical experiment, three chambers were run simultaneously, with back-to-back light-dark incubations. This was generally done twice to include 6 replicates per site on each date. Rocks were sealed in each chamber then each chamber was submerged into the river as far as possible without water coming over the top of the chamber. Black tops were placed over the chambers during dark incubations to ensure no light would reach the inside of the chamber. Dissolved oxygen and chamber temperature were measured at three minute intervals during the course of the incubation (30-90 minutes). At the end of each experiment, rocks were removed from each chamber and the aluminum foil surface area and weight/area relationships were used to determine surface area of rocks (Steinman et al. 2006). PAR was measured using a Li-Cor Quantum Sensor. Soluble reactive phosphorus was measured using colorimetric method (APHA 1998).

We used 3 experimental reaches in the Kuparuk for this analysis., -0.177k, +0.5k, and 2.0k. In 2011 a phosphorus dripper was added at 0.0k creating fertilized sections downstream from 0.0k to 3.5k. This includes both recovery sections and the fertilized section as indicated by Benstead et al. (2007). University of Alabama Box 870206   Tuscaloosa Alabama 35487 U.S.A
Funding for this project was made available from NSF-OPP#0902126.

APHA (1998) Standard methods for the examination of water and wastewater, American Public Health Association, Washington, DC, USA.
Benstead, J., Green, A., Deegan, L., Peterson, B., Slavik, K., Bowden, W. & Hershey, A. (2007) Recovery of three arctic stream reaches from experimental nutrient enrichment. Freshwater Biology, 52, 1077-1089.
Bowden, W., Peterson, B., Finlay, J. & Tucker, J. (1992) Epilithic chlorophyll a, photosynthesis, and respiration in control and fertilized reaches of a tundra stream. Hydrobiologia, 240, 121-131. 
Steinman, A.D., Lamberti, G.A. & Leavitt, P. (2006) Biomass and pigments of benthic algae. Methods in stream ecology, 2. 
Bott, T.L., J.R. Brock, C.E. Cushing, S.V. Gregory, D. King & R.C. Petersen, 1978. A comparison of methods for measuring primary productivity and community respiration in streams. Hydrobiologia 60: 3-12.
Duff, J.H,, K.C. Stanley & R.J. Avanzino, 1984. The use of photosynthesis-respiration chambers to measure nitrogen flux in epilithic algal communities. Verh. Internat. Verein. Limnol. 22: 1436-1443.
King, D.K., 1982. Community metabolism and autotrophic-heterotrophic relationships of woodland stream riffle sections. Ph.D. Thesis. Michigan State University, East Lansing. 356 pp.
Pennak, R.W. & J.W. Lavelle, 1979. In situ measurements of net primary production in a Colorado mountain stream. Hydrobiologia 66: 227-235.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site LTER Site Code number number      
Date Date datetime   DD-MMM-YYYY    
PAR Average Photsynthetically Active Radiation during incubation (Photosynthetic photon flux density) number micromolePerMeterSquaredPerSecond     *=Missing or not measured
Time Time of day datetime   hh:mm    
Barometer (kPA) Barometric pressure number kilopascal     N/A=Missing or Not Measured
Dissolved Oxygen (mg/L) Dissolved Oxygen concentration number milligramPerLiter     N/A=Missing or Not Measured
Temperature (C) Temperature number celsius     N/A=Missing or Not Measured
Location River Location based on LTER sampling text        
ProbeID Identifies probe of use number number     N/A=Missing or Not Measured
L/D Light or Dark Treatment text        
SRP (mol L-1) Soluble Reactive Phopshorus as measured on day of sampling number molarity     N/A=Missing or Not Measured
Discharge (m3/s) Average Discharge on day of sampling number meterCubedPerSecond     N/A=Missing or Not Measured

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