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-porewater.15
Dataset Title:Porewater nutrient concentrations from control plots and fertilized plots at Spartina alterniflora, S.patens and Typha sp. marshes, Plum Island Ecosystem LTER, MA.
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:Robert Daoust, Helen Marshall, Diana Rodriguez
Keywords:PIE LTER, Plum Island Ecosystems, Massachusetts, Rowley River, Parker River, inorganic nutrients, porewater, salt marsh, nutrient cycling, ammonium, phosphate, Typha, Spartina
Abstract:Nutrient concentrations from porewater samples at marsh sites in the Plum Island Ecosystems (PIE) LTER site. There are three long term marsh fertilization experimental research sites. The fertilization sites include one Typha-dominated brackish marsh, one Spartina alterniflora-dominated salt marsh, one S. patens-dominated salt marsh on the Rowley and upper Parker Rivers and two non-fertilized marsh sites on the Parker River National Wildlife Refuge.
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/LTE/data/LTE-MP-porewater.csv
Data File Name LTE-MP-porewater
Beginning Date 7/1/1999
End Date 10/31/2018
Number of Data Records 8762
Other Files to Reference
Availability Status type 1
Quality Control Information
Maintenance Description Collections occur every month from May through October. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Dec 2018.
Log of Changes: Version 01: July 11, 2006 Level 3+ EML using Jim laundre's Excel program
Version 02: January 10, 2007 data and metadata update
Version 03: March 12, 2008 Data and metadata update
Version 04: February 20, 2009 Data and metadata update
Version 05: January 13, 2010 Data and metadata update
Version 06: October 25, 2011 Data and metadata update
Version 07: January 12, 2012, 2011 data and metadata update, using MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/12/12 11:51AM for QA/QC to EML 2.1.0
Version 08: March 14, 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 09: April 21, 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
Version 10: February 11, 2015, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0
Version 11: February 25, 2016, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0
Version 12: March 7, 2016, edited incorrect BD and "." values, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0
Version 13: September 20, 2017, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jun2017.xlsm 6/15/17 10:23 AM for QA/QC to EML 2.1.0
Version 14: June 22, 2018, data and metadata updated to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2018.xlsm 6/21/2018 3:53 PM for QA/QC to EML 2.1.0
Version 15: February 7, 2019, data and metadata updates to comply with importation to DEIMS7 and LTER Data Portal. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2018.xlsm 6/21/18 3:53 PM for QA/QC to EML 2.1.0
 
RESEARCH LOCATION: LTE-MP-LPA LTE-MP-LPP LTE-MP-ORT LTE-MP-SRA LTE-MP-SRP  
Geographic Description Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina alterniflora plot level fertilization experiment. Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina patens plot level fertilization experiment Upper Parker River off Orchard St., Newbury, MA, Typha sp. plot level fertilization experiment Marsh off of Stackyard Road in the Parker River National Wildlfe Refuge, Rowley, MA; location is dominated by Spartina alterniflora Marsh off of Stackyard Road in the Parker River National Wildlfe Refuge, Rowley, MA; location is dominated by Spartina patens.  
Location Bounding Box            
West Bounding Coordinate            
East Bounding Coordinate            
North Bounding Coordinate            
South Bounding Coordinate            
OR if single point location            
Latitude 42.731742 42.730954 42.756738 42.74416389 42.74414444  
Longitude -70.842472 -70.842915 -70.917717 -70.83406111 -70.83419167  
Elevation            
             
             
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied Typha; Spartina alterniflora; Spartina patens
 
Methods:General:
This data set is part of a study including three on-going plot-level fertilization sites and two additional monitoring sites. The first (LTE-MP-LPA) is in the low marsh at Law's Point along the Rowley River. The second (LTE-MP-LPP) is in the high marsh at Law's Point along the Rowley River. The third (LTE-MP-ORT) is in a brackish water marsh on an upstream tributary of the Parker River. Porewater samplers were established at LTE-MP-LPA in Jun 1999, at LTE-MP-LPP in Aug 2000 and at LTE-MP-ORT in Jun 2000. In 2017, two new sites were established. LTE-MP-SRA is in a S.alterniflora-dominated section of the marsh at Stackyard Road, part of the Plum Island NWR. LTE-MP-SRP is in a S.patens-dominated section of the marsh at Stackyard Road, part of the Plum Island NWR.

At each site a system of boardwalks was built to incorporate 12 experimental plots (1m2 each). There are 4 treatments (three replicates each) within the boardwalk structure. The 4 treatments are Control, N-fertilized, P-fertilized, N+P fertilized. Additionally, at each site there are 3 control plots and 3 N+P fertilization plots external to the boardwalk structure. These external plots contain porewater samplers, and, in some cases, biomass census plots. In May 2006 the control porewater plots and control census plots at all three sites were moved because of potential contamination from fertilized plots.

Fertilizer is buried at several locations within each plot, monthly, from May-September. From 1999-2001 the annual fertilization rate was 30 molN/m2/y and/or 15 mol P/m2/y. From 2002 to present fertilization rate is 7.5 mol N/m2/y and/or 3.75 mol P/m2/y. N fertilizer was NH4NO3 through 2008, and currently is nitrate/urea/sulfate (34-0-0). P fertilizer is P2O5 (0-44-0).

Sampling Description:
Triplicate porewater diffusion samplers are permanently installed in fertilized and control plots at each of the three research sites. Each sampler collects porewater from depths of 10, 25, 50, 75, and 100 cm. Samples are retrieved approximately monthly from May through October. Porewater samples are either filtered (0.2 uM) and preserved with H2SO4 (for PO4 and NH4) or preserved unfiltered with ZnAc (for sulfides) either in the field or immediately upon return from the field. The samples are then shipped to a lab in SC for analysis.

Lab Methods:
Filtered porewater samples are analyzed for PO4 and NH4 according to standard laboratory protocols (Strickland and Parsons 1972) and for chloride concentrations by coulometric titration using a Haake-Buchler chloridometer. Unfiltered, preserved porewater samples are analyzed for sulfide concentrations colorimetrically (Cline 1969). Salinity is calculated from chloride concentrations.

Elevations:
LTE-MP-LPA, ~ 1.1 meters NAVD88
LTE-MP-LPP, ~ 1.4 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 current name of sampling station, following naming protocol   nominal          
YEAR year   datetime     YYYY    
MONTH month   datetime     MM    
DAY day   datetime     DD    
TRT treatment   nominal NP=fertilized | C=control        
REP porewater sampler replicate number   nominal          
DEPTH depth (cm) centimeter ratio   real      
PO4 phosphate concentration (uM PO4) micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
NH4 ammonium concentration (uM NH4) micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
S2 sulfide concentration (uM S-2) micromolePerLiter ratio   real   . | BD .=not measured | BD=below detection
Cl chloride concentration (g Cl/l) gramPerLiter ratio   real   . | BD .=not measured | BD=below detection
SALINITY salinity (ppt) partPerThousand ratio   real   . | BD .=not measured | BD=below detection