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Arctic LTER Database
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: | 99ne1nuts |
| Dataset Title: | Depth profiles of NO-3, NH-4, PO-4, TDN, TDP, PP, PN and PC for lake NE1, Arctic LTER 1999. |
| Investigator 1: | |
| First Name: | Anne | | Last Name: | Giblin | | Address line 1: | | | Address line 2: | | | Address line 3: | | | City: | | | State: | | | Zip Code: | | | Country: | | | Associate Investigators: | Neil Bettez, Jennifer Wasik, Shana Rhapaport |
| Keywords: | phosphorus, ammonium, nitrate, TDN, TDP, PP, PN, PC, nutrients. |
| Abstract: |
Depth profiles of NO-3, NH-4, PO-4, TDN,
TDP, PP, PN and PC for lake NE1. |
| 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: |
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| Data File Name |
99ne1nuts |
| Beginning Date |
5/1/1999 |
| End Date |
9/1/1999 |
| Number of Data Records |
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| Other Files to Reference |
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| Availability Status |
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| Quality Control Information |
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| Maintenance Description |
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| Log of Changes: |
Log of changes:
For Archival Use:
DATE RECEIVED: September, 1999
DATA FILE ENTERED BY: Neil Bettez
DATA FILE VALIDATION:
NAME: Neil Bettez
DATE: September, 1999 |
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| RESEARCH LOCATION: |
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| Geographic Description |
Lake NE1 |
| Location Bounding Box |
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| West Bounding Coordinate |
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| East Bounding Coordinate |
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| North Bounding Coordinate |
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| South Bounding Coordinate |
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| OR if single point location |
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| Latitude |
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| Longitude |
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| TAXONOMIC COVERAGE: |
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| Organisms studied |
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| Methods: |
Water samples were collected at each depth using a Van Dorn. Inorganic nutrient
samples (ammonium and phosphorus) were filtered in the field using 25 mm .2um
Nalgene syringe filters. Fiterd was was used for both phosphorus samples, which
were analyzed using standard methods (Strickland and Parsons1972), and ammonium
samples, which were analyzed using Strickland and Parsons 1985. Ammonium
samples were also analyzed using unfiltered water samples with a modified method
according to Holmes at al 1999.
Nitrate samples were frozen and shipped to MBL. Nitrate/nitrite was
determined on an alp chem autoanalyzer using an OTCR with method (AlpKem RFA
method A303-S171).
Total dissolved nitrogen samples were preserved with 100 ul / 60ml 6N
Ultrex HCL, shipped to MBL, and stored at -20 C. Samples were was digested with
potassium persulfate and nitrate + nitrite and nitrite determined on an Alp
chem. autoanalyzer using a open tubular cadmium reactor (OTCR) method (PN
000623 #8-92 rev B).
Total dissolved phosphorus samples were fixed with 100 ul / 60 ml using 6N
Ultrex HCL, shipped to MBL, and stored at 4 C.
Particulate Phosphorus, nitrogen and carbon samples were collected on pre-
combusted 25 mm GF/F filters. Filters were dried overnight at 55 C prior to
shipment. Particulate phosphorus was determined using methods of Stainton et
al., (1974). Particulate Nitrogen and carbon were run on a Perkin elmer CHN
analyzer.
Reference Citations: AlpKem Rapid flow analysis method A303-S171 for Nitrate
AlpKem Rapid flow analysis method PN 000623 #8-92 rev B for TDN
Holmes, R. Aminot, A. Kerouel, R. Hooker, B. Peterson, J. 1999. A simple and
precise method for measuring ammonium in marine and fresh water ecosystems.
Can. J. Fish. Aquat. Sci. 56: 1801-1808
Stainton, M. P. & Capel, M. J., 1974. Particulate Phosphorus. In: The chemical
Analysis of fresh water. (Eds. : Stainton, M, P. Capel, M, J) Fisheries Research
Board of Canada, Ottawa, 67-70.
Strickland and Parsons. 1985. A quantification of low-level ammonia in
freshwaters. Standard Methods 1985, p 382.
Strickland, J. D. & Parsons, T. R., (Eds.) 1972. A practical handbook of
seawater analysis. second edition. Fisheries Research Board of Canada, Ottawah
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 ammonium uM n
PO4 SRP uM n
NO3 nitrate uM n
TDN Total dissolved N uM n y
TDP Total dissolved P uM n y
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
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