Plum Island Ecosystems 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

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:LTE-MP-NIN-porewater.03
Dataset Title:Nutrient concentrations from porewater samples at Spartina alterniflora-dominated salt marsh plots in North Inlet, Georgetown, SC.
Investigator 1: 
First Name:Jim
Last Name:Morris
Address line 1:Dept of Biological Sciences
Address line 2:
Address line 3:University of SC
City:Columbia
State:SC
Zip Code:29208
Country:USA
Investigator 2: 
First Name:Karen
Last Name:Sundberg
Address line 1:Baruch Marine Field Laboratory
Address line 3:PO Box 1630
City:Georgetown
State:SC
Zip Code:29442
Country:USA
Associate Investigators:Warren Hankinson
Keywords:LTER, PIE, Plum Island Ecosystems, South Carolina, North Inlet, estuary, salt marsh, Spartina alterniflora, porewater, ammonium, phosphate, sulfide, chloride, iron, Southeast United States
Abstract:Nutrient concentrations from permanent porewater samplers in a Spartina alterniflora-dominated salt marsh in North Inlet, Georgetown, SC. There are six sites. Two sites are low marsh; four are high marsh. One site in the high marsh is fertilized with nitrogen an phosphorus. One site in the high marsh is located in a dieback.
Contact: Plum Island Ecosystems LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7485
Email: pie_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/PIE/
DATA FILE INFORMATION:
Data File URL http://ecosystems.mbl.edu/PIE/data/LTE/data/LTE-MP-NIN-porewater.dat
Data File Name LTE-MP-NIN-porewater
Beginning Date 12/1/1993
End Date 12/31/2007
Number of Data Records 12470
Other Files to Reference LTE-MP-porewater
Availability Status type 1
Quality Control Information
Maintenance Description Collections occur every month. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Jan 2008.
Log of Changes: Version 1:July 11, 2006 Level 3+ EML using Jim Laundre's Excel program
Version 2: January 10, 2007 data and metadata update
Version 3: March 13, 2008 Data and metadata update
 
RESEARCH LOCATION: Site 1 Site 2
Geographic Description North Inlet, Georgetown, SC  
Location Bounding Box    
West Bounding Coordinate -79.2  
East Bounding Coordinate -79.18  
North Bounding Coordinate 33.35  
South Bounding Coordinate 33.32  
OR if single point location    
Latitude    
Longitude    
Elevation    
     
     
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied Spartina alterniflora
 
Methods:Sampling Description:
Triplicate porewater diffusion samplers are permanently installed on the marsh platform in fertilized (26.7 mol N/m2/y and 12.3
mol P/m2/y) or control plots in a Spartina alterniflora-dominated salt marsh in North Inlet, SC. Each sampler collects porewater from depths of 10, 25, 50, 75, and 100 cm. Samples are retrieved monthly. Porewater samples are either filtered (0.45 uM) or preserved with ZnAc (for sulfides) immediately upon return from the field.

Lab Methods:
Filtered porewater samples are analyzed for PO4, NH4, chloride and Fe (+2) concentrations according to standard laboratory protocols (Strickland and Parson 1972; Gibbs 1979). Unfiltered, preserved porewater samples are analyzed for sulfide (Cline 1969).

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
SITE name of sampling station   nominal GI=Goat Island | OL=Oyster Landing | DB=Sixty Bass Dieback        
LOCATION location of sampling station   nominal HM=High Marsh | LM=Low Marsh        
YEAR year   datetime     yyyy    
MONTH month   datetime     mm    
TRT treatment   nominal NP=Fertilized | C=Control        
REP replicate   nominal          
DEPTH depth centimeter nominal          
PO4 phosphate concentration (uM-P) microMolesPerLiter ratio   real   . .=not measured
NH4 ammonium concentration (uM-N) microMolesPerLiter ratio   real   . .=not measured
S2 sulfide concentration (uM-S) microMolesPerLiter ratio   real   . .=not measured
Cl chloride concentration (gCl/l) gramsPerLiter ratio   real   . .=not measured
Fe2 iron (+2) concentration (uM-Fe+2) microMolesPerLiter ratio   real   . .=not measured
COMMENTS Information pertaining to individual data points   nominal