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-Flux.02
Dataset Title:	Rates of benthic metabolism and nutrient cycling in the Parker and Rowley Rivers of the Plum Island Sound estuary.
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:	Charles
Last Name:	Hopkinson
Address line 1:	Ecosystems Center
Address line 2:	MBL
Address line 3:	7 MBLSt
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Associate Investigators:	Jane Tucker, Hap Garritt, Nat Weston, Josh Goldstein, Greg Peterson, Sam Kelsey, Dave Vasiliou, Ishi Buffam, John Logan, Corey Lawrence, Emily Gaines, William Lee, Christina Maki, Aaron Strong
Keywords:	LTER, PIE, Plum Island Ecosystems, Massachusetts, Parker River, Rowley River, sediment, benthos, metabolism, respiration, nutrient cycling, sediment-water exchange, flux, ammonium, nitrate, phosphate, methane, nitrous oxide, dissolved inorganic carbon, oxygen
Abstract:
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-Flux.dat
Data File Name	BEN-PR-Flux
Beginning Date	6/15/1993
End Date	12/9/2006
Number of Data Records	85
Other Files to Reference
Availability Status	Type 1
Quality Control Information
Maintenance Description
Log of Changes:	ver. 01 contained data through 29 Sept 2003.
	ver. 02 updates the dataset through 12 Sept 2006.

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
Geographic Description	Parker R, ~22 km upstream of reference	ParkerR, ~22 km upstream of reference, intertidal bank	Pond above the Parker R. dam, or 24.2 km upstream of reference	Parker R., ~24 km upstream of reference, just downstream of the Parker R. dam	Parker R., ~14 km upstream of reference, just downstream of the mouth of the Mill R.	Parker R., ~11 km upstream of reference, just downstream of the Route 1A Town Landing	Parker R., ~5.5 km upstream of reference, at the mouth of the Rowley R; Hog Island Pt.	Parker R.,~23.5 km upstream of reference	Parker R.,~23.5 km upstream of reference, intertidal bank	Eagle R., upstream fork of Rowley River, ~13 km from reference	Eagle R., upstream fork of Rowley River, ~13.5 km from reference	Eagle R., upstream fork of Rowley River, ~14 km from reference
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude	42.74989	42.74989	42.74972	42.75085	42.75507	42.7613	42.72719	42.75138	42.75138	42.70736	42.70494	42.70264
Longitude	-70.91733	-70.91733	-70.9291	-70.92756	-70.8729	-70.83861	-70.81364	-70.92464	-70.92464	-70.86255	-70.86402	-70.86607
Elevation


TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied

Methods:	Benthic respiration and nutrient fluxes were measured in sediment cores incubated in the dark and at in situ temperatures in the laboratory. Incubation duration was determined by the time required for oxygen concentrations to fall by 2 to 5 mg O2 L-1 but remain above 50% of saturation (generally 6 to 48 hrs). Dissolved inorganic nitrogen and phosphorus were measured at at least 4 time points concurrent with O2 measurements. At the beginning and end of the incubation period, samples were taken for total CO2 (TCO2 or DIC) analyses. Dissolved organic carbon (DOC), total dissolved nitrogen (TDN), N2O, and methane (CH4) were also measured during some fluxes. See ANALYTICAL METHODS. Benthic respiration [based on O2, CO2 or CH4] and nutrient flux across the sediment-water interface were calculated as the slope of the constituent concentration versus time. The values were corrected for changes in the water overlying the cores by subtracting constituent consumption measured in BOD bottles. NOTES AND COMMENTS: 1. At Stations BEN-PR-P22 and BEN-PR-P14, some flux incubations have been run to look at the differences between fluxes during high versus low tides. These fluxes began in October, 1999 for Station BEN_PR_P22 and in April 2001 for BEN_PR_P14. Sediment cores were incubated with overlying water collected to represent high tide and low tide conditions at each site. In the data, the parallel fluxes are distinguished by the salinity value listed. 2. To look at the duration of a salinity effect on fluxes, cores from Station BEN_PR_P22 in May, 2000, were incubated twice, with the second incubation starting 5 days after the first. During the second incubation, only O2, TCO2, and NH4 fluxes were measured.

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-mmm-yyyy		blank cell
STATION-CURRENT	current name of sampling station, following naming protocol		nominal					blank cell
STATION-PREVIOUS	name of sampling station prior to establishment of naming protocol		nominal					blank cell
RIVER KM	kilometer distance, mid-channel, upstream from mouth of Plum Island Sound (RK= 0)	kilometer	interval		real			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
SAL	salinity (ppt)	partsPerThousand	interval		real			blank cell
TEMP-F	temperature field (Celsius)	celsius	interval		real			blank cell
TEMP-I	temperature incubation (Celsius)	celsius	interval		real			blank cell
O2_E	oxygen flux (mmole O2 m-2 d-1) as measured by oxygen electrode	millimolesPerSquareMeterPerDay	ratio		real			blank cell
O2_W	oxygen flux (mmole O2 m-2 d-1) as measured by Winkler titration	millimolesPerSquareMeterPerDay	ratio		real			blank cell
DIC	dissolved inorganic carbon, or total CO2 flux (mmole C m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
NH4	ammonium flux (mmole N m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
NO3	nitrate + nitrite flux (mmole N m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
DIN	dissolved inorganic nitrogen (NH4+ + NO3- + NO2-) flux (mmole N m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
PO4	dissolved phosphate flux (mmole P m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
DOC	dissolved organic carbon flux (mmole C m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
DON	dissolved organic nitrogen (TDN - DIN) flux (mmole N m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
CH4	methane flux (mmole C m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
N2O	nitrous oxide flux (mmole N m-2 d-1)	millimolesPerSquareMeterPerDay	ratio		real			blank cell
COMMENTS	information pertaining to individual data points		nominal					blank cell