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-NAC-porewatermeans.05
Dataset Title:Nutrient concentrations from porewater samples at a Spartina alterniflora-dominated salt marsh at Goat Island, 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, inorganic nutrients, estuary, salt marsh, Spartina alterniflora, porewater, ammonium, phosphate, sulfide, chloride, Southeast United States
Abstract:Porewater samples from a Spartina alterniflora-dominated salt marsh on Goat Island, North Inlet, Georgetown, SC were analyzed for ammonium, phosphate, sulfide and chloride concentrations.
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://pie-lter.ecosystems.mbl.edu
DATA FILE INFORMATION:
Data File URL http://ecosystems.mbl.edu/PIE/data/MAR/data/LTE-MP-NAC-porewatermeans.csv
Data File Name LTE-MP-NAC-porewatermeans
Beginning Date 1/1/1994
End Date 12/31/2013
Number of Data Records 229
Other Files to Reference LTE-MP-LAC-porewatermeans; LTE-MP-LPC-porewatermeans
Availability Status type 1
Quality Control Information
Maintenance Description Collections occur approximately every month. Database is updated seasonally. Study and data collection are ongoing as of Jan 2014.
Log of Changes: Version 01; new data and metadata
Version 02; new data and metadata
Version 03: February 2, 2012, updated data and metadata to Dec 2011. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 2/1/12 5:00 PM for QA/QC to EML 2.1.0
Version 04: August 8, 2013, 2012 data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0
Version 05: April 23, 2014, 2013 data and metadata updated to comply with importation to Drupal and LTER PASTA.Used MarcrosExportEML_HTML (working)pie_excel2007_Sep2013.xlsm 9/30/13 02:57 PM for QA/QC to EML 2.1.0
 
RESEARCH LOCATION: LTE-MP-NIN-GIHM Site 2
Geographic Description Goat Island, North Inlet, Georgetown, SC; high marsh Spartina alterniflora plot level fertilization experiment (GIHM). The Goat Island sites are accessible from Clambank Rd. about 1/2mile south of Clambank Landing. A board walk connects the high marsh siteand the low marsh site. The North Inlet Estuary is located onthe southeastern coast of the United States, approximately 10 kilometers east of Georgetown, South Carolina. The North Inlet Estuary lies east of the uplands of Hobcaw Barony (also known as the Belle W. Baruch Property). To the north of the Estuary is the Debordieu Colony Property. North Inlet Estuary is a bar-built Class C type estuary (Pritchard, 1955) and is arelatively small tidal estuary (area = 2630 hectares). It is composed of numerous winding tidal creeks dominated bySpartina alterniflora and is considered a pristine tidal estuary due to minimal anthropogenic impacts. The watershed drains a 24.8 square kilometer area of mostly pine forest and a moderately developed residential watershed to the north.  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 33.331659  
Longitude -79.198208  
Elevation    
     
     
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied Spartina alterniflora
 
Methods:General:
This data set is part of an on-going project in a Spartina alterniflora-dominated marsh at the Baruch Marine Field Laboratory in North Inlet, Georgetown, SC.

Sampling Description:
Triplicate porewater diffusion samplers are permanently installed in control plots on the marsh platform 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) and preserved with HCl (for PO4 and NH4) or preserved unfiltered with ZnAc (for sulfides) either in the field or immediately upon return from the field. Porewater collection began in Jan 1994.

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

Numerical Processing:
Data are reported as geometric means of sample concentrations from 3 depths within the root zone (10, 25, and 50 cm), and the 95% confidence interval, for 3 replicate samplers (n=9 per time). Statistics were computed using SAS (SAS System for Windows; release 8.02; SAS Institute, Inc; Cary, NC).

Elevation:
LTE-MP-NIN-GIHM, ~ 0.5 meters NAVD88

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          
year year   datetime     yyyy    
month month   datetime     mm    
Cl chloride concentration, gCl/l gramPerLiter ratio   real   . | BD .=not measured | BD=below detection
L1 (Cl) lower limit; 95% confidence interval; gCl/l gramPerLiter ratio   real   . | BD .=not measured | BD=below detection
L2 (Cl) upper limit; 95% confidence interval; gCl/l gramPerLiter ratio   real   . | BD .=not measured | BD=below detection
NH4 ammonium concentration, uM-N micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L1 (NH4) lower limit; 95% confidence interval; NH4, uM-N micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L2 (NH4) upper limit; 95% confidence interval; NH4, uM-N micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
PO4 phosphate concentration, uM-P micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L1 (PO4) lower limit; 95% confidence interval; PO4, uM-P micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L2 (PO4) upper limit; 95% confidence interval; PO4, uM-P micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
S2 sulfide concentration, uM-S micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L1 (S2) lower limit; 95% confidence interval; S2, uM-S micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
L2 (S2) upper limit; 95% confidence interval; S2, uM-S micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection