uid=PIE,o=EDI,dc=edirepository,dc=org all public read HTL-EST-Clam-densitysediment Sediment grain characteristics and clam densities for clam flat surveys during 2010 in the Plum Island Sound estuary, Newbury, Rowley and Ipswich, MA. Chuck Hopkinson Plum Island Ecosystems LTER http://pie-lter.ecosystems.mbl.edu/ Plum Island Ecosystems LTER http://pie-lter.ecosystems.mbl.edu/ Kyung-Ah Koo (706) 542-7671 kooka@uga.edu associated researcher Emily Davenport (706) 542-7671 davene@uga.edu associated researcher 2015 English
In 2010 a study was conducted at five sites in the Rowley and Parker Rivers, Northeast Massachusetts, to determine the distribution and density of soft shell clams along a transect from the high to low tide line, as well as the sediment grain size distribution a t each of the sites.
Population Dynamics Core Areas population dynamics grain size sediment softshell clam PIE LTER Plum Island Ecosystems LTER Controlled Vocabulary
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https://pie-lter.ecosystems.mbl.edu/content/sediment-grain-characteristics-and-clam-densities-clam-flat-surveys-during-2010-plum-island- Site of clam surveys at confluence of Mill River with Parker River, Newbury, MA -70.872085571289 -70.872085571289 42.755184173584 42.755184173584 Site of clam surveys, alias "Grandkids Flat", southeast of Cape Merrill in Plum Island Sound, Newbury, MA -70.810981750488 -70.810981750488 42.748298645020 42.748298645020 Site of clam surveys, end of Stackyard Rd, east of Nelson Island, in Plum Island Sound, Newbury, MA. -70.821899414062 -70.821899414062 42.746250152588 42.746250152588 Site of clam surveys, near kite flag pole, mouth of Rowley River, Rowley, MA -70.815147399902 -70.815147399902 42.727134704590 42.727134704590 Site of clam surveys, tidal flat near PIE LTER Rowley field station, Rowley, MA. -70.854949951172 -70.854949951172 42.725368499756 42.725368499756 2010-05-11 2010-08-06 Data complete for 2010 Version 01: September 29, 2015, data and metadata created to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0 Plum Island Ecosystems LTER http://pie-lter.ecosystems.mbl.edu/ Plum Island Ecosystems LTER http://pie-lter.ecosystems.mbl.edu/ Plum Island Ecosystems
At each site, three transects were measured out from the marsh edge to the low tide line (marked as 1 ,2 and 3 in the data file ) Each transect was divided into 5 (sometimes 6 depending on the length of the transect) points (marked as A-E, sometimes F in the data file) and at each point the elevation of the point was calculated. The elevation for each sampling point was extracted from the digital elevation model (DEM) of Plum Island Sound, 2 m spatial resolution, developed using LIDAR data (Zhao, Chen et al. 2010). A one square foot quadrat was placed on the sediment and any clams residing in that section of sediment were counted to determine the density of clams living at that specific elevation in the sediment (density data is reported as number of clams per square meter). Each clam found was measured for length and weight. Midtransect sediment samples were taken to determin e the sediment grain size at each site/transect. Sediment samples were analyzed in the lab to determine the percentage of pebbles, (phi size 0 to -6) sand (phi size 0 to 5), clay (phi size 6-9) and silt (phi size >9) in each .A detailed procedure for determining sediment grain size and the theory behind the calculations can be found at the following: http://pubs.usgs.gov/of/2000/of00-358/text/chapter1.htm http://www.lib.utexas.edu/geo/folkready/entirefolkpdf.pdf Briefly, a homogenized subset of sediment was taken from each bagged sample and dried in a drying oven. The driedsediment was then shaken through a series of mesh sieves and the sediment remaining in each sieve was weighed. Anything larger than 2000um was considered gravel/pebbles, and anything smaller than 2000umand larger than 63um was considered part of the sand fraction. Anything that ended up in the smallest mesh size sieve (<63um, the clay + silt fraction) was placed into a 1000ml graduated cylinder with some dispersant (sodium hexametaphosphate, 50g/L) The cylinder was shaken through inversion for 1 minute and then allowed to settle over a 24hr time period. During that time frame the cylinder was subsampled at set intervals using a volumetricpipette at a specific measured depth in the cylinder. This liquid was put into a pre-tared beaker and the beakers were dried in a drying oven and then weighed . Calculations outlined in http://www.lib.utexas.edu/geo/folkready/entirefolkpdf.pdf and http://pubs.usgs.gov/of/2000/of00-358/text/chapter1.htm were used to determine the percentage of pebbles, sand, clay and silt in each sample.
HTL-EST-Clam-densitysediment_csv Sediment grain characteristics and clam densities for clam flat surveys during 2010 in the Plum Island Sound estuary, Newbury, Rowley and Ipswich, MA. HTL-EST-Clam-densitysediment.csv 17611 326e069348c9ed5e3c560d96809d02d8 5035b017f17d04c60d743a8dc3e28144159c8e14 1 0 column , https://pie-lter.ecosystems.mbl.edu/sites/default/files/data/HTL-EST-Clam-densitysediment.csv Date Date Date of sampling date DD-MON-YYYY NA missing Station_ID Station_ID Name of sampling station string Name of sampling station Transect_name Transect_name Name of transect at each sampling station string Name of transect at each sampling station Latitude Latitude Latitude of sampling station (decimal degrees) degree real NA missing Longitude Longitude Longitude of sampling station (decimal degrees) degree real NA missing Elevation Elevation Elevation of specific transect in meters meter real NA missing Pebble_% Pebble_% Sediment pebble fraction percent real NA missing Sand_% Sand_% Sediment sand fraction percent real NA missing Clay_% Clay_% Sediment clay fraction percent real NA missing Silt_% Silt_% Sediment silt fraction percent real NA missing Density Density Number of clams found per square meter numberPerMeterSquared real NA missing Clam_ID Clam_ID Individual ID of clam(s) found on each transect string Individual ID of clam(s) found on each transect Length Length Length of individual clam millimeter real NA missing Weight Weight Weight of individual clam gram real NA missing HTL-EST-Clam-densitysediment_xls Excel metadata and data file associated with the csv data source file. Excel file after downloading is to be used for adding/editing new metadata and data. HTL-EST-Clam-densitysediment.xls 136192 3fbc8732fff2473289e4144b566a71fe 32c3a813cf2041bc9d21c4732ea915dedf7a50a7 application/vnd.ms-excel https://pie-lter.ecosystems.mbl.edu/sites/default/files/data/HTL-EST-Clam-densitysediment.xls document
360 degrees comprise a unit circle SI unit of length ratio of two quantities as percent composition (1:100) .001 meters 0.001 kg