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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:	94s6nuts
Dataset Title:	Depth profiles of NO-3, NH-4 ,PO-4, TDN, PP, PN and PC for lake S6 in 1994, Arctic LTER 1994.
Investigator 1:
First Name:	Mike
Last Name:	Miller
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:	Neil Bettez, Eric Goldfarb, tech Smith
Keywords:	phosphorus, ammonia, nitrite, nitrate, TDN, PP, PN, PC, nutrients.
Abstract:	Depth profiles of NO-3, NH-4 ,PO-4, TDN, PP, PN and PC for lake S6 in 1994.
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	94s6nuts
Beginning Date	5/1/1994
End Date	9/1/1994
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATE RECEIVED: April, 1995 DATA FILE ENTERED BY: Neil Bettez DATA FILE VALIDATION: NAME: Neil Bettez DATE: May, 1995



RESEARCH LOCATION:
Geographic Description	S6
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:	Water samples were collected at depths 0,1,3,5,8,12,16 meters with a Van Dorn. Water was filtered in the field using 47mm .045 um millipore HAE filters. Phosphorus, ammonia and nitrate/nitrite samples were kept at 4 C in amber HDPE bottles until being run on an ALP chem auto analyzer . Due to an unsatisfactory high detection limit for NH-4 on the AA ammonia was determined manually from July 11 until Aug 22 using Standard methods. TDN samples were stored frozen in LDPE bottles and shipped to MBL. Total dissolved organic N was digested with potassium persulfate and determined on an alp chem autoanalyzer using a packed cadmium column and RFA method number AS303-S171-09 . Particulate Phosphorus, nitrogen and carbon samples were collected on precombusted 25 mm GF/F filters and stored frozen until processing, Particulate phosphorus was determined using methods of Stainton et al., (1974). Particulate Nitrogen and Carbon were dried in a dessicator and run on a Perkin elmer CHN analyzer. Reference Citations: R.G. Wetzel & G.E. Likens. 1979. Limnological Methods. Saunders. Philadelphia. A quantification of low-level ammonia in freshwaters. Standard Methods 1985, p 382. Stainton, M.P. M.J. Capel, F.A.J.1974. Armstrong The chemical Analysis of fresh water. Fish Res. Board Can. Misc.Spec. Pub. 25: 67. 1974. Sampling Description. None

Data Table

Variable	Variable descrip.	Precis./Units		Coded		Missing
(Y/N)		Values
SITE		site of measurement	site code		y
Lake		Lake sampled					n
Depth		depth sampled		meters			n
DATE		Date			DD-MMM-YY		n
NH4		ammonia			uM			n		y
PO4		SRP			uM			n
NO3		nitrate			uM			n
TDN		total dissolved N	uM			n
PP		Particulate phosphorus	u moles/L		n		y
PN		Particulate Nitrogen	ug/l			n		y
PC		Particulate Carbon	ug/l			n		y
(12) CALCULATIONS
Variable		Formula