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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
Data Policies
PIE LTER Data Use Agreement
This work is licensed under the Creative Commons Attribution 4.0 International License, CC BY - Attribution. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:
1) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier.
For example: Giblin, Anne; Hopkinson, Charles (2000): Rates of benthic metabolism and nutrient cycling in the Parker and Rowley Rivers of the Plum Island Sound estuary. Plum Island Ecosystems LTER, Long Term Ecological Research
Network. http://dx.doi.org/10.6073/pasta/17fa8b4fef50c7b85cac3d61482a7cb6
2) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. The Data User should contact the Data Set Contact to ensure the appropriate Granting Programs are acknowledged.
For example: Data sets were provided by the Plum Island Ecosystems LTER. This material is based upon funding supported by the National Science Foundation under Grants #OCE-9726921, OCE-0423565, OCE-1058747, OCE-1238212, OCE-1637630.
3) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
4) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.
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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
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326e069348c9ed5e3c560d96809d02d8
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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