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Arctic LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Older Metadata: Attribute table not in XML (EML) file

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	96bohypo
Dataset Title:	Hyporheic nutrient data, Arctic LTER 1996.
Investigator 1:
First Name:	William
Last Name:	Bowden
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:	Kenneth Edwardson
Keywords:	hyporheic, nutrients, nitrate, phosphate, ammonia, dissolved oxygen, temperature, conductivity, pH, carbon dioxide, methane, Oksrukuyik
Abstract:	Hyporheic nutrient data. Samples were collected from riffles in Oksrukuyik creek, late in the 1996 season.
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 Name	96bohypo
Beginning Date	5/1/1996
End Date	9/1/1996
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATA RECEIVED: June 1997 DATA FILE ENTERED BY: Karie Slavik DATA FILE VALIDATION: NAME: DATA:



RESEARCH LOCATION:
Geographic Description	Oksrukuyik creek
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude
Longitude



TAXONOMIC COVERAGE:
Organisms studied

Methods:	Hyporheic samplers were installed to a pool-riffle-pool sequence 550 meters downstream of the fertilization point. Well Construction/Installation: Hyporheic samplers consisted of a 1/8 inch O.D. stainless steel (S.S.) tube housed in a 3/4 inch CPVC pipe. At the lower end of the CPVC a rubber stopper was inserted with the S.S tube protruding ten centimeters. A coupler was then used to attach a length of well screen to protect the S.S. tube. Tygon tubing was slid onto the top end of the S.S tubing and a three-way Pharmaseal stopcock was inserted into the tubing. Samplers were inserted into the stream bed by forcing a pry bar into the stream bed to a depth of the maximum depth allowed, typically 30-60 centimeters. The sampler was then worked down into the hole and the pry bar removed, allowing the hole to backfill around the sampler. The length of the sampler, still above the substrate, was measured and subtracted from the total length to find the depth of the sampler in the substrate. Samplers were allowed to settle before any testing occurred. Sample collection: Samples were collected via a 60 mL syringe directly from the sampler after drawing 30 mL out to purge the interior of the sampler. Samples were filtered through a 25 mm diameter 0.45 um cellulose acetate syringe filter in the field. Sample analysis: Specific conductivity was measured in the field on a VWR model 2052 conductivity meter. All sample analysis were done within 24 hours of collection and stored cold during the interim period. Ammonia-nitrogen concentrations were determined by the phenate method. Nitrate-nitrogen was determined by cadmium reduction. Phosphate-phosphorous was determined by the ascorbic acid method. Dissolved oxygen was determined on a Solomat dossolved oxygen probe. Carbon dioxide and methane were measured directly by equilibration of the sample with ambient air. The head-space air was then analyzed by thermal conductivity for CO2 and flame ionization for CH4. Concentrations were corrected for ambient concentrations, depth, temperature, and pH. Temperature was measured with a Omega model 871 digital thermometer and pH was measured with a Orion pH Triode. Notes: The variable, D/D for Distance on river is in reference to the top of the riffle. Use the X and Y coordinates (river right to left and distance downstream) for more detailed positions. (11) VARIABLE DESCRIPTIONS: Precision Coded? Missing Variable Variable Description Units (Y/N) Values Site River y n D/D River distance m n n Depth Depth of Sampler cm n y Number Sampler ID y n X X-coordinate meters n y Y Y-coordinate meters n y Date Date dd-mmm-yy n n CO2 Carbon Dioxide umoles/L n y CH4 Methane umoles/L n y DO Dissolved Oxygen mg/L n y NH4 Ammonia umoles/L n y PO4 Phosphate umoles/L n y NO3 Nitrate umoles/L n y Temp Temperature Celsius n y pH pH n y Comments Reference Citations: American Public Health Association. 1989. Standard methods for the examination of water and wastewater. 17th ed. American Public Health Association, American Water Works Association, and Water Pollution Control Federation, Washington, DC. Kling,G.W., Kipphut, G.W., and Miller, M.C. 1992. The Flux of CO2 and CH4 from lakes and rivers in arctic Alaska. Hydrobiologia, 240:23-36. Sampling Description. None

Data Table

Site		River							y	n
D/D		River distance				m		n	n
Depth	Depth of Sampler			cm		n	y
Number	Sampler ID 						y	n
X		X-coordinate				meters	n	y
Y		Y-coordinate				meters	n	y
Date		Date						dd-mmm-yy	n	n 
CO2		Carbon Dioxide				umoles/L	n	y
CH4		Methane					umoles/L	n	y
DO		Dissolved Oxygen			mg/L		n	y
NH4		Ammonia					umoles/L	n	y
PO4 		Phosphate 				umoles/L	n	y 
NO3		Nitrate 					umoles/L	n	y
Temp		Temperature				Celsius	n	y
pH		pH								n	y
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