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:EST-PR-O2.04
Dataset Title:Transects of the Parker River Plum Island Sound Estuary conducted at dawn and dusk, containing dissolved oxygen, conductivity, temperature, percent saturation, pH, DIC and pCO2 data.
Investigator 1: 
First Name:Charles
Last Name:Hopkinson
Address line 1:Georgia Sea Grant College Program
Address line 2:University of Georgia
Address line 3:229 Marine Sciences
Zip Code:30602
Associate Investigators:Hap Garritt, Ishi Buffam, Justin LeBlanc, Nat Weston, Joe Vallino, Greg Peterson, Pete Raymond, Byron Crump, Josh Goldstein, Corey Lawrence, William Lee, Aaron Strong, Rebecca Prosser, Catherine Caruso, Samuel Kelsey
Keywords:PIE LTER, Plum Island Ecosystems, Massachusetts, primary production, organic matter, dissolved oxygen, conductivity, gas, salinity gradient, metabolism, respiration, gross primary production, net primary production, community production, Parker River, Plum Island estuary
Abstract:Multi-year transects, beginning in 1995, of the Parker River Plum Island Sound Estuary conducted at dawn and dusk, containing dissolved oxygen, conductivity, temperature, percent saturation, pH, DIC and pCO2 measurements. Differences between dawn and dusk measurements can be used to determine the water metabolism and corresponding estimates of gross primary production, total system respiration and net ecosystem production.
Contact: Plum Island Ecosystems LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7485
Online URL:
Data File URL
Data File Name EST-PR-O2
Beginning Date 6/27/1995
End Date 9/1/2010
Number of Data Records 5678
Other Files to Reference EST-PR-O2info.xls
Availability Status Type 1
Quality Control Information
Maintenance Description On going collection of data
Log of Changes: 01) 16Jul2007 updated to EML level 4-5
02) 27Sep2007 added new data
03) 11Jan2010 added new data
Version 04: January 24, 2012, updated data (including missing DIC) and metadata through 2010. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/18/12 4:51 PM for QA/QC to EML 2.1.0
RESEARCH LOCATION: Site 1 Site 2 Site 3 Site 4 Site 5 Site 6 Site 7 Site 8 Site 9 Site 10 Site 11 Site 12 Site 13 Site 14 Site 15 Site 16 Site 17 Site 18 Site 19 Site 20 Site 21 Site 22 Site 23 Site 24 Site 25 Site 26 Site 27 Site 28 Site 29 Site 30 Site 31 Site 32 Site 33  
Geographic Description EST-SO-31 Spindle EST-SO-30 IBYC EST-SO-29 Eagle ST-SO-28 Rowley EST-SO-Buoy EST-SO-27 Far Point EST-SO-26 Nelson EST-PR-25 EST-PR-24 EST-PR-23 Rt1A EST-PR-22 EST-PR-21 RR EST-PR-20 Mill EST-PR-19 EST-PR-18 EST-PR-17 Rt1 EST-PR-16 EST-PR-15 Middle Rd EST-PR-14 EST-PR-13 EST-PR-12 EST-PR-11 EST-PR-10 EST-PR-9 EST-PR-8 EST-PR-7 EST-PR-6 EST-PR-5 EST-PR-4 EST-PR-3 EST-PR-2 EST-PR-1 EST-PR-0  
Location Bounding Box                                                                    
West Bounding Coordinate                                                                    
East Bounding Coordinate                                                                    
North Bounding Coordinate                                                                    
South Bounding Coordinate                                                                    
OR if single point location                                                                    
Latitude 42.697826 42.70978014 42.71664032 42.72578704 42.7274965 42.73555086 42.74716149 42.75701283 42.76177168 42.76241138 42.76258164 42.75552712 42.75472052 42.75886977 42.76247293 42.75965806 42.75708039 42.75890398 42.75679492 42.7578321 42.75697423 42.75323937 42.75484502 42.75321957 42.75219747 42.75187234 42.74829383 42.75027 42.75174265 42.75361634 42.75026711 42.75152731 42.75085508  
Longitude -70.78356249 -70.79483658 -70.80722347 -70.81191035 -70.80569481 -70.80121718 -70.82008701 -70.82331615 -70.83675555 -70.84765737 -70.85821174 -70.86666078 -70.87582063 -70.87766807 -70.88417006 -70.89170367 -70.89690988 -70.90094097 -70.90275717 -70.90605787 -70.90897971 -70.90913332 -70.91250557 -70.91555269 -70.91020899 -70.91494934 -70.91495895 -70.91913309 -70.91691665 -70.92156561 -70.92555212 -70.92622744 -70.92796269  
Taxonomic Protocols
Organisms studied
Transects were conducted in a motorboat with a sample inlet device located beneath the hull that, when the boat was moving, would force water into an enclosed chamber and past the sampling probe. Dissolved oxygen, percent saturation, conductivity, temperature and pH were measured in the chamber with a Hydrolab or YSI sonde (see ANALYTICAL METHODS). On dates when DIC and pCO2 were measured, samples were collected in the outlet line into glass bottles, and preserved with HgCl2. As we did not need to stop at each station to obtain a sample, transects were completed quickly and represent a close to instantaneous dissolved oxygen transect of the estuary.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
STATION Station name and/or number   nominal         blank cell
DATE date (dd-mmm-yyyy)   datetime     dd-mmm-yyyy   blank cell
TIME "dusk" or "dawn" - time of day transect was conducted   nominal         blank cell
STATE X x coordinates (meters) in MA state plane NAD 83 meter interval   real     blank cell
STATE Y y coordinates (meters) in MA state plane NAD 83 meter interval   real     blank cell
LAT Latitude in NAD 83 geographic coordinates (decimal degrees) degree interval   real     blank cell
LON Longitude in NAD 83 geographic coordinates (decimal degrees) degree interval   real     blank cell
DIST distance (km) from the mouth of Plum Island Sound estuary (0 km) kilometer interval   real     blank cell
COND conductivity (mS/cm) millisiemenPerCentimeter ratio   real     blank cell
TEMP temperature (C) celsius interval   real     blank cell
DO dissolved oxygen (mg/l) milligramPerLiter ratio   real     blank cell
% SAT dissolved oxygen percent saturation percent ratio   real     blank cell
pH pH dimensionless ratio   real     blank cell
DIC dissolved inorganic carbon (M-C) micromolePerLiter ratio   real     blank cell
pCO2 partial pressure of carbon dioxide (atm) microatmosphere ratio   real     blank cell
CO2 uM concentration of carbon dioxide (M-C) in water micromolePerLiter ratio   real     blank cell
Fluor fluorescence dimensionless ratio   real     blank cell
Comments additional information concerning station sampling   nominal         blank cell