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:BEN-PR-Sed-Porewater.01
Dataset Title:Sediment porewater nutrients, sulfide, pH, and alkalinity in the Parker and Rowley River, Massachusetts
Investigator 1: 
First Name:Anne
Last Name:Giblin
Address line 1:Ecosystems Center
Address line 2:MBL
Address line 3:7 MBLSt
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Investigator 2: 
First Name:Chuck
Last Name:Hopkinson
Address line 1:
Address line 2:University of Georgia
Address line 3:229 Marine Sciences
City:Athens
State:GA
Zip Code:30602
Country:USA
Associate Investigators:Jane Tucker, Hap Garritt, Nat Weston, Josh Goldstein, Greg Peterson, Sam Kelsey, Dave Vasiliou, Ishi Buffam, Emily Gaines, Mac Lee, Aaron Strong, Christina Mackie, Rebecca Prosser, Colin Millar, Catherine Caruso
Keywords:PIE LTER, Massachusetts, Rowley River, Parker River, inorganic nutrients, sediment, benthos, porewater, ammonium, nitrate, phosphate, sulfide, pH, alkalinity
Abstract:Measurements of sediment porewater nutrient, sulfide, pH, and alkalinity, 1993 -2004, at a variety of sites and salinities throughout the Plum Island Sound estuary.
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/BEN/data/BEN-PR-Sed-Porewater.csv
Data File Name BEN-PR-Sed-Porewater
Beginning Date 6/18/1993
End Date 9/14/2004
Number of Data Records 458
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 01: 14Sep2013, metadata and data created to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Sep2013.xlsm 9/10/13 12:02 PM for QA/QC to EML 2.1.0
 
RESEARCH LOCATION: BEN-PR-P22 BEN-PR-P22 (Intertidal) BEN-PR-P24.2 BEN-PR-P14 BEN-RO-R5.5 BEN-RO-R8C BEN-RO-R8M  
Geographic Description Benthic flux station, Parker River upper estuarine portion near Triton High School, Newbury, MA Benthic flux station, Parker River upper estuarine portion near Triton High School, Newbury, MA, intertidal Benthic flux station, Parker River pond above Parker River Central Street Dam, Newbury, MA Benthic flux station, Parker River downstream of Mill River confluence, Newbury, MA Benthic flux station, Hog Island Point off mouth of Rowley River, Rowley, MA Benthic flux station, Law's Point, Rowley River, 8 km from Plum Island Sound mouth reference, creek bottom Benthic flux station, Law's Point, Rowley River, 8 km from Plum Island Sound mouth reference, marsh platform  
Location Bounding Box                
West Bounding Coordinate                
East Bounding Coordinate                
North Bounding Coordinate                
South Bounding Coordinate                
OR if single point location                
Latitude 42.749889 42.749889 42.749722 42.754838 42.727187 42.7322 42.732  
Longitude -70.917329 -70.917329 -70.929096 -70.872904 -70.813637 -70.8418 -70.8418  
Elevation                
                 
                 
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied
 
Methods:EXPERIMENTAL DESIGN AND METHODS:
Sediment cores were obtained in the field and transported to the laboratory for analysis within 24 hr.
For data that corresponds to a "INT TOP" and "INT BOT" entry, sediment cores for porewater extraction were sectioned by depth (in a glove bag under N2 for any samples that have HS- or PO4 -3 data). Porewater was removed from muddy sediments by centrifuging sections of mud for 15 minutes. At sandy sites it was necessary to use a "split" centrifuge tube with filter support. Centrifugation for 15 minutes forces porewater though the filter into the bottom of the tube. Nutrients, sulfides, pH and alkalinity in porewaters were analyzed (see ANALYTICAL METHODS).

For data that donot correspond to a "INT TOP" and "INT BOT" entry, porewater samples were obtained through the use of a whole-core squeezer. Teflon filter rods were inserted into holes drilled at intervals along the core tubing. Pressure was slowly applied (vertically), and water was extracted into syringes.

Additional NH4+ and salinity porewater data resulted from experimental work conducted between March 1999 and May 2000 and may be found in the file: BEN-PR-Sediment_NH4_Salinity_Project.xlsx. This data set also includes porosity, bulk density, and some organic carbon and total nitrogen data.

Some reported NO3 values are below the dectection limit (0.1然) of the analysis , but numerical values are retained to prevent their exclusion from summary calculations.

HS values of 0 are also below the detection limit of the analysis (1然); however, in the context of esturaine biogeochemistry, a 0 value for HS- is useful for describing freshwater or highly oxidized sediments.

Site (Current Name) , Site (Previous Name)
BEN-PR-P22, BEN-PR-P2
BEN-PR-P22 (Intertidal), BEN-PR-P2 (Intertidal)
BEN-PR-P24.2, BEN-PR-P0
BEN-PR-P14 , BEN-PR-P5
BEN-RO-R5.5 , BEN-SO-Row
BEN-RO-R8C BEN-RO-LPC
BEN-RO-R8M BEN-RO-LPM

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
DATE date of sample collection   datetime     dd-mon-yyyy NA NA = sample not taken - not analyzed or lost
STATION-CURRENT current name of sampling station, following naming protocol   nominal       NA NA = sample not taken - not analyzed or lost
STATION-PREVIOUS name of sampling station prior to establishment of naming protocol   nominal       NA NA = sample not taken - not analyzed or lost
River Km kilometer distance, mid-channel, upstream from mouth of Plum Island Sound (RK= 0) kilometer interval   real   NA NA = sample not taken - not analyzed or lost
LAT Latitude in NAD 83 geographic coordinates (decimal degrees) degree interval   real   NA NA = sample not taken - not analyzed or lost
LON Longitude in NAD 83 geographic coordinates (decimal degrees) degree interval   real   NA NA = sample not taken - not analyzed or lost
INT TOP depth to top of sediment section, given as negative to indicate subsurface (cm) centimeter interval   real   NA NA = sample not taken - not analyzed or lost
INT BOT depth to bottom of sediment section, given as negative to indicate subsurface (cm) centimeter interval   real   NA NA = sample not taken - not analyzed or lost
DEPTH average depth of sediment increment of section sampled, given as negative to indicate subsurface (cm) centimeter interval   real   NA NA = sample not taken - not analyzed or lost
SAL salinity (ppt) partPerThousand interval   real   NA NA = sample not taken - not analyzed or lost
HS porewater hydrogen sulfide (mM-S) millimolePerLiter ratio   real   NA NA = sample not taken - not analyzed or lost
NH4 porewater ammonium (然-N) micromolePerLiter ratio   real   NA NA = sample not taken - not analyzed or lost
NO3 porewater nitrate + nitrite (然-N) micromolePerLiter ratio   real   NA | BD NA = sample not taken - not analyzed or lost | BD = below detection
PO4 porewater soluble reactive phosphorus (然-P) micromolePerLiter ratio   real   NA NA = sample not taken - not analyzed or lost
pH porewater pH dimensionless interval   real   NA NA = sample not taken - not analyzed or lost
ALK porewater alkalinity (mEq) milliequivalentPerLiter ratio   real   NA NA = sample not taken - not analyzed or lost
COMMENTS information pertaining to individual data points   nominal       NA NA = sample not taken - not analyzed or lost