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:||Aboveground biomass data from control sites in a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, 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, primary production, estuary, salt marsh, Spartina alterniflora, aboveground biomass, Northeast United States|
|Abstract:||Aboveground biomass is determined non-destructively at permanent, high marsh control (non-fertilized) plots in a Spartina alterniflora-dominated salt marsh on the Rowley River within 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-biomassmeans.csv|
|Data File Name||LTE-MP-LAC-biomassmeans|
|Number of Data Records||68|
|Other Files to Reference||LTE-MP-LPC-biomassmeans; LTE-MP-NAC-biomassmeans|
|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.
The biomass-estimation method is non-destructive. Two permanent subplots were established in each of 3 control plots in the marsh. Each subplot is 10cmx10cm. The subplots are labeled 1&2, with subplot 1 being the more northerly and/or westerly subplot. In May and June, plants in the subplots are tagged with bird ID bands. Approximately monthly from May to October, heights of the tagged plants and associated culms are measured to the nearest cm. Plant heights are read into a digital recorder. Descriptions of the locations of the plants within the quadrat are also recorded (e.g. northwest corner or northwest of tag #xxxx). Plant measurements are always taken with the observer on the same side of the quadrat for ease in tracking plants throughout the growing season.
The plant census at began in June 1999. In May 2006 the Control census plots were relocated due to potential contamination from fertilized plots. The census subplots kept the same id#ís from when they were within the boardwalk for continuity within the ACCESS database.
Plant data are entered first into an EXCEL spreadsheet, and eventually transferred to an ACCESS data base. Outputs from ACCESS are processed with two FORTRAN programs. The FORTRAN programs use algorithms to convert the ACCESS data outputs to plant weight, density, births, deaths and growth (Morris and Haskin, 1990). Fortran outputs are entered into SAS programs to calculate means.
(Morris and Haskin, 1990. Ecology 71(6):2209-2217)
(SAS System for Windows; release 8.02; 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|
|mean biomass||mean biomass, dry weight||gramPerMeterSquared||ratio||real||.||.=not measured|
|stderr||standard error of the mean biomass||gramPerMeterSquared||ratio||real||.||.=not measured|
|comments||Information pertaining to individual data points||nominal||blank cell|