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:HTL-TC-RO-GA-MusselSnail2002.01
Dataset Title:Year 2002, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.
Investigator 1: 
First Name:Linda
Last Name:Deegan
Address line 1:The Ecosystems Center
Address line 2:Marine Biological Laboratory
Address line 3:7 MBL St.
City:Woods Hole
Zip Code:02543
Associate Investigators:Susan Olezsko-Zsuts
Keywords:PIE LTER; population dynamics; Rowey River; mussels; snails; school yard project; salt marsh
Abstract:This study was conducted during the Summer of 2002, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.
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 HTL-TC-RO-GA-MusselSnail2002
Beginning Date 7/30/2002
End Date 8/8/2002
Number of Data Records 938
Other Files to Reference
Availability Status Type 2
Quality Control Information
Maintenance Description Annual collection, complete for 2002
Log of Changes: Version 01: July 30, 2013 data and metadata 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
RESEARCH LOCATION: MON-TC-RO-conf-Club MON-TC-RO-conf-Nelson MON-TC-RO-conf-Sand MON-TC-RO-conf-Shad MON-TC-RO-conf-Sweeney MON-TC-RO-conf-West  
Geographic Description Clubhead Creek confluence site, Rowley, MA Nelson Island Creek confluence site, Rowley, MA Sand Creek confluence site, Rowley, MA Shad Creek confluence site, Rowley, MA Sweeney Creek confluence site, Ipswich, MA West Creek confluence site, Rowley, MA  
Location Bounding Box              
West Bounding Coordinate              
East Bounding Coordinate              
North Bounding Coordinate              
South Bounding Coordinate              
OR if single point location              
Latitude 42.739824 42.74176 42.730156 42.736565 42.721969 42.737824  
Longitude -70.838038 -70.832854 -70.854472 -70.84327 -70.847262 -70.849118  
Taxonomic Protocols
Organisms studied Geukensia ssp; Ilyanassa ssp.; Littorina littoria
Methods:Creeks were typically sampled at a confluence and then up the corresponding two branches, labeled by distance from the confluence and yellow (Y) or blue (B) corresponding to the flagging tape used on site markers; for example, a site 100 m upstream from the confluence on Clubhead Creek would be designated Clubhead B100 or Y100. Distance up the creek was determined by stakes laid out in 50 meter intervals.
Sampling was conducted at or near low tide as much as possible. At each site, the sampling transect would start at the edge of the Spartina patens zone, and continue down the creek bank until reaching the center of a drained creek or until reaching water. Quadrats were laid out by deploying a ladder-like template: 1 meter wide by 2 meter long, divided into sections at 25cm increments. This ladder would be repeatedly laid across the creek bank to cover the entire transect from S. patens to the creek center. Each section of the ladder would enclose an area of 0.25 m2 in which all mussels (Geukensia sp) and snails, Ilyanassa sp. and Littorina littoria. Notes on zonations (eg. Beginning and end of S. alterniflora zone), and surface features, as well as presence of other large organisms (eg. Oysters or other snails) were noted.

Sampling site locations were either:
At the confluence of two tidal creek branches.
Y or B followed by a number referring to meters upstream from the Confluence for those creeks with paired branches.
A number, referring to meters upstream of an area in a creek without paired branches which is equivalent to the confluence of branched creeks.
D100, referring to 100 meters downstream of the confluence or equivalent
Zone: refers to the increment along the sampling ladder where organisms were counted.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Date date data collected (DD-MON-YYYY)   datetime     DD-MON-YYYY NA NA = not available
Creek creek in which data was collected   nominal       NA NA = not available
Sampler Persons who collected the data   nominal       NA NA = not available
Location Sampling site location   nominal       NA NA = not available
Zone Transect sampling interval range in meters   nominal       NA NA = not available
Area Area of transect meterSquared ratio   real   NA NA = not available
NumGeukensia Number of Geukensia spp. Present number ratio   real   NA NA = not available
NumIlyanassa Number of Ilyanassa spp. Present number ratio   real   NA NA = not available
NumLittorina Number of Littorina spp. Present number ratio   real   NA NA = not available
Comments Comments noted   nominal       NA NA = not available