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:WAT-YSI-FishBr-2002.03
Dataset Title:Year 2002, 15 minute measurements of stage, water temperature, conductivity, dissolved oxygen, and pH in a small headwater stream draining a moderate sized, mixed land use (mainly forest) watershed, Fish Brook, Middleton, MA.
Investigator 1: 
First Name:Wilfred
Last Name:Wollheim
Address line 1:Morse Hall
Address line 2:UNH
Address line 3:
Zip Code:03824
Associate Investigators:Brian Pellerin
Keywords:PIE LTER, disturbance, Fish Brook, forest, water temperature, water stage, conductivity, pH, dissolved oxygen
Abstract:During 2002, continuous measurements, every 15 minutes, were made of stage, water temperature, conductivity, dissolved oxygen, and pH in a small headwater stream, Fish Brook, Boxford, MA, draining a moderate sized, mixed land use watershed. Measurements are for part of the ice free season (June December). Discharge could not be determined due to inadequate rating curve and due to beaver activity. Several day gaps occur periodically due to removal for recalibration.
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 WAT-YSI-FishBr-2002
Beginning Date 3/22/2002
End Date 12/3/2002
Number of Data Records 21105
Other Files to Reference All in the YSI series
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 01, 30 Oct 2007 updated metadata to EML level 3+
Version 02, 21Jan2010 keyword update
Version 03, 14May2013, metadata and data updated to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0
Geographic Description Watershed water collection and stream characterization site for Fish Brook, Boxford, MA  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 42.65831  
Longitude -71.004821  
Taxonomic Protocols
Organisms studied
Methods:YSI 6200 data sondes were deployed vertically in a pool deep enough to contain water during dry conditions. The sonde was deployed in a PVC tube, which was attached to ree-bar driven into the stream bed. The PVC tube had holes drilled to allow adequate water circulation. Dissolved oxygen measurements are of good quality because detritus did not accumulate in the bottom of the pool (unlike our suburban site). The PVC tube was surveyed upon original deployment in 2001 and resurveyed in 2002 to ensure that elevation did not change during winter ice period. No change was detected. Recalibration was performed roughly every 4-6 weeks. Instrument drift during deployment periods was not significant.

RESEARCH LOCATION: Locations are in Massachusetts State Plane coordinates. The site is located on Fish Brook just upstream of Middleton Rd. in Boxford (~31 km2 drainage area). The contributing area includes mainly forest and no public water withdrawals.

YSI-FB 240600 934310

Discharge could not be determined due to inadequate rating curve and beaver activity.
Dissolved oxygen concentrations reflect water column levels.
NA refers to data not available.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Date date (yyyy-mm-dd)   datetime     yyyy-mm-dd NA NA = not available
Time time (hh:mm:ss) 24 hour   datetime     hh:mm:ss NA NA = not available
Temp water temperature (oC) celsius interval   real   NA NA = not available
SpCond specific conductivity (mS/cm) millisiemenPerCentimeter ratio   real   NA NA = not available
DO% dissolved oxygen percent of saturation (%) percent ratio   real   NA NA = not available
DOConc dissolved oxygen concentration (mg/l) milligramPerLiter ratio   real   NA NA = not available
Depth stage height (m) meter ratio   real   NA NA = not available
pH log of the H+ ion concentration dimensionless ratio   real   NA NA = not available
Flow discharge (l/s) literPerSecond ratio   real   NA NA = not available