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:
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 Title:||Marsh surface elevation data from control plots in a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem (PIE) LTER, MA.|
|Investigator 1:|| |
|Address line 1:||Dept of Biological Sciences|
|Address line 2:|
|Address line 3:||University of SC|
|Investigator 2:|| |
|Address line 1:||Baruch Marine Field Laboratory|
|Address line 3:||PO Box 1630|
|Associate Investigators:||Rob Daoust|
|Keywords:||LTER, PIE, Plum Island Ecosystems, Massachusetts, Rowley River, disturbance, organic matter, estuary, salt marsh, Spartina alterniflora, elevation, surface elevation table (SET), sedimentation erosion table (SET), Northeast United States|
|Abstract:||A Surface Elevation Table (SET) is used to measure changes in the elevation of the marsh platform at a Spartina alterniflora-dominated marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site, MA.|
|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: http://ecosystems.mbl.edu/PIE/
|DATA FILE INFORMATION:|
|Data File URL||http://ecosystems.mbl.edu/PIE/data/MAR/data/LTE-MP-LAC-elevationmeans.csv|
|Data File Name||LTE-MP-LAC-elevationmeans|
|Number of Data Records||66|
|Other Files to Reference||LTE-MP-LPC-elevationmeans; LTE-MP-NAC-elevationmeans|
|Availability Status||type 1|
|Quality Control Information|
|Maintenance Description||Collections occur approximately every month from May through October. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Jan 2012.|
|Log of Changes:||Version 01; new data and metadata|
|Version 02; new data and metadata|
|Version 03: February 2, 2012, updated data and metadata to Oct 2011. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 2/1/12 5:00 PM for QA/QC to EML 2.1.0|
|RESEARCH LOCATION:||MAR-RO-PlotLPAlterniflora||Site 2|
|Geographic Description||Law's Point on Rowley River, Rowley, MA, site of Spartina alterniflora plot level fertilization.|
|Location Bounding Box|
|West Bounding Coordinate|
|East Bounding Coordinate|
|North Bounding Coordinate|
|South Bounding Coordinate|
|OR if single point location|
|Organisms studied||Spartina alterniflora|
This data set is part of an on-going LTER project at the Plum Island Ecosystem (PIE) site. The sampling location is in a Spartina alterniflora-dominated marsh at Law's Point between the Rowley River and West Creek in Rowley MA.
Triplicate original-style SET stations were installed in the marsh in June 1999. Each SET consists of a permanently installed benchmark post and a removable arm. The arm has a vertical and a horizontal component. The vertical component fits into the SET benchmark post; the horizontal component reaches out over an experimental subplot and has a square plate at the end through which 9 pins are lowered. Each SET post is associated with two adjacent plots (one control, one NP fertilized; only the control data are included here). Each plot has three subplots. Therefore, each SET benchmark post is positioned such that 27 elevation readings can be taken in each plot (9 readings in 3 subplots). Plots are numbered. Subplots are identified as L, C, or R for left, center and right, when facing the plot (back to the SET post). To measure elevations, the SET arm is locked in place over each subplot, is leveled, and the 9 brass pins are lowered to touch the sediment surface and held in place with a clip. Pin heights are measured from the top of the nut on the plate to the top of the pin, and read into a digital recorder. The recordings are transcribed into one master SET pin height data set. Change in marsh elevation is determined by subtracting pin height at time X from the mean pin height for the subplot at time 0. SET readings occur approximately monthly, from May-October.
The horizontal portion of the removable part of the PIE LTER SET can be correctly installed and leveled in several positions: the arm can be extended all the way forward, all the way back, and anywhere in between. All SET measurements are made with the arm all the way back, i.e. with the plate being as close to the SET post as possible and the SET arm being as short as possible.
The SET was manufactured by Nolanís Machine Shop in Lafayette LA; 337-235-5261. Replacement pins or collars can be purchased from Nolanís. Stainless steel parts (roll pins etc) come from McMaster-Carr. Measuring pins are held in place with badge clips, available at office supply stores.
Data are transcribed from a digital recorder to an Excel spreadsheet. Change in marsh elevation is determined by subtracting pin height at time X from the mean pin height for the subplot at time 0. SAS programs are used to determine treatment means and standard error for each month. (SAS System for Windows; release 9.1; SAS Institute, Inc; Cary, NC)
|Variable Name||Variable Description||Units||Measurement Scale||Code Information||Number Type||DateTime Format||Missing Value Code||Missing Value Code Explanation|
|site||name of sampling station||nominal|
|elev change||mean change in elevation||centimeter||interval||real||.||.=not measured|
|stderr||standard error of the mean||centimeter||interval||real||.||.=not measured|
|comments||Information pertaining to individual data points||nominal|