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 (treatment means and stderr) from three marsh fertilization experimental research sites.|
|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:||Robert Daoust, Helen Marshall, Diana Rodriguez|
|Keywords:||PIE LTER, Plum Island Ecosystems, Massachusetts, Rowley River, Parker River, organic matter, inorganic nutrients, SET, surface elevation, accretion, salt marsh, ammonium, phosphate, Typha, Spartina|
|Abstract:||A Surface Elevation Table (SET) is used to measure changes in the elevation of the marsh surface at three long term marsh fertilization experimental research sites. The sites include one Typha-dominated brackish marsh, one Spartina alterniflora-dominated salt marsh, and one S. patens-dominated salt marsh. Sites are located on the Rowley and upper Parker Rivers in the Plum Island Ecosystem (PIE) LTER site. |
|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/LTE/data/LTE-MP-SET-means.csv|
|Data File Name||LTE-MP-SET-means|
|Number of Data Records||310|
|Other Files to Reference||LTE-MP-SET-raw|
|Availability Status||type 1|
|Quality Control Information|
|Maintenance Description||Collections occur every month from May through October. Database is updated once annually, usually in the winter. Study and data collection are ongoing as of Dec 2011.|
|Log of Changes:||Version 01: July 11, 2006 Level 3+ EML using Jim Laundre's Excel program|
|Version 02: June 19, 2007, edited using Jim Laundre's Excel program (June 18, 2007 version)|
|Version 03: March 12, 2008 Data and metadata update|
|Version 04: February 17, 2009 Data and metadata update|
|Version 04: January 13, 2010 Data and metadata update|
|Version 05: October 25, 2011 Data and metadata update|
|Version 06: January 12, 2012, 2011 data and metadata update, using MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/12/12 11:51AM for QA/QC to EML 2.1.0|
|Version 07: March 15, 2013, 2012 data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0|
|Geographic Description||Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina alterniflora plot level fertilization experiment.||Law's Point on Rowley River, Rowley, MA, site of PIE LTER Spartina patens plot level fertilization experiment||Upper Parker River off Orchard St., Newbury, MA, Typha sp. plot level fertilization experiment|
|Location Bounding Box|
|West Bounding Coordinate|
|East Bounding Coordinate|
|North Bounding Coordinate|
|South Bounding Coordinate|
|OR if single point location|
|Organisms studied||Typha; Spartina alterniflora; Spartina patens|
There are three on-going plot-level fertilization sites. The first (LTE-MP-LPA) is in the low marsh at Law's Point along the Rowley River. The second (LTE-MP-LPP) is in the high marsh at Law's Point along the Rowley River. The third (LTE-MP-ORT) is in a brackish water marsh on an upstream tributary of the Parker River. SET sampling at the Parker River site was discontinued after May 2008.
At each site a system of boardwalks was built to incorporate 12 experimental plots (1m2 each). There are 4 treatments (three reps each) within the boardwalk structure. The 4 treatments are Control, N-fertilized, P-fertilized, N+P fertilized. Additionally, at each site there are 3 control plots and 3 N+P fertilization plots external to the boardwalk structure. These external plots contain porewater samplers, and, in some cases, biomass census plots. In May 2006 the control porewater plots and control census plots at all three sites were moved because of potential contamination from fertilized plots.
Fertilizer is buried at several locations within each plot, monthly, from May-Sept. From 1999-2001 the annual fertilization rate was 30 molN/m2/y and 15 mol P/m2/y. From 2002 to present fertilization rate is 7.5 mol N/m2/y and/or 3.75 mol P/m2/y. N fertilizer was NH4NO3 through 2008, and currently is nitrate/urea/sulfate (34-0-0). P fertilizer is P2O5 (0-44-0).
Triplicate SET benchmarks are permanently installed between fertilized and control plots at each of the three research sites. Each SET benchmark is positioned such that 27 elevation readings can be taken in a fertilized plot (9 readings in 3 subplots) and 27 elevation readings can be taken in a control plot. At each subplot, the SET sampling arm is leveled, 9 brass pins are lowered to the marsh surface, and the height of each pin above the sampling plate is measured and recorded. Surface elevations are measured monthly from May through October at LTE-MP-LPA and LTE-MP-LPP, and in May and October only at LTE-MP-ORT.
Triplicate original-style SET benchmark posts were permanently installed at each site. Each SET consists of a permanently installed 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 the 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). Each SET benchmark post is positioned such that 27 elevation readings can be taken in a fertilized plot (9 readings in 3 subplots) and 27 elevation readings can be taken in a control plot. 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 ORT SET was discontinued in 2008.
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||current name of sampling station, following naming protocol||nominal|
|TRT||treatment||nominal||NP=fertilized | C=control|
|MEAN ELEV CHANGE (cm)||treatment mean change in height of marsh surface since beginning of experiment (cm)||centimeter||ratio||real||.||.=not measured|
|STDERR||treatment standard error||centimeter||ratio||real||.||.=not measured|