Plum Island Ecosystems LTER Database

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:

Principal Investigator
Ecosystems Center
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:End of growing season percent cover and biomass data for hayed vs reference sites.
Investigator 1: 
First Name:Robert
Last Name:Buchsbaum
Address line 1:Massachusetts Audubon, North Shore
Address line 2:Endicott Regional Center
Address line 3:356 Grapevine Road
Zip Code:01984
Associate Investigators:Hap Garritt
Keywords:PIE LTER, primary production, organic matter, population dynamics, haying, salt marsh, vegetation
Abstract:End of growing season percent cover and biomass data for hayed vs reference sites.
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:
Data File URL
Beginning Date 9/13/2000
End Date 10/5/2001
Number of Data Records 291
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 01, initial Excel to EML metadata
Version 02 keyword update
Geographic Description Salt marsh that is hayed by Dan McHugh in Rowley and reference areas in the vicinity of Stackyard and Patmos Roads. Four studies sites (two hayed and two references). The two hayed sites are McH1 (hayed every year, north of Patmos Rd) and EPH (east of Perry's land and between Sawyer Creek and Patmos Rd, hayed every two years, last hayed in 1999). The two reference sites are PUH (Perry Unhayed, between Sawyer Creek and Patmos Rd) and Club Creek (south of Stackyard Rd and bounded on its E side by the PRNWR).  
Location Bounding Box    
West Bounding Coordinate -70.847  
East Bounding Coordinate -70.836  
North Bounding Coordinate 42.74  
South Bounding Coordinate 42.747  
OR if single point location    
Taxonomic Protocols
Organisms studied Spartina alterniflora; Spartina patens; Distichlis spicata; Juncus gerardi; Distichlis spicata; Salicornia europae; Atriplex patula; Iva frutescens; Solidago sempervirens; Suaeda linearis; Glaux maritima; Agropyron repens
Methods:Samples for biomass measurements were collected along transects in two hayed and two reference sites. These are the same transects used in LTE-MD-VEGTRANS.xls and LTE-MD-VEGQUADS.xls. Transects lengths varied from ca. 35-150 meters depending on the shape of the marsh. Quadrats (either 0.01 or 0.0625 m2) were placed down at 5 m (shorter transects) or 10 m (100+ m transects) intervals along the transect. Estimates of percent cover by species were recorded, then all plants within the quadrat were clipped at the surface of the sediment. Plants were then sorted into living and dead aboveground biomass. Living plants were sorted by species. Plant material was then dried at 60oC until constant weight (approximately 48 hrs) and then weighed on an electronic balance.
NOTES AND COMMENTS: Names of observers: RB (Robert Buchsbaum), WD (Wendy Dalia), ADR (April Ridlon), PB (Peter Britz), CN (Carl Noblett).
The biomass data in this file is expressed in g per m2. The raw data entered onto original spreadsheet contained the biomass in grams per quadrat, which was either 0.01 or 0.0625 m2 depending on the anticipated density of plants at each site.
The % cover data in this file are based on a rather small quadrat and were collected as a quality control procedure for the biomass samples. Use LTE-MD-VEGQUADS.xls for vegetation analysis.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Site area where data and plants were collected   nominal          
Treatment shows if site is a hayed area or a reference area   nominal          
TRANSECT Transect line along which plants were observed and collected. Code names are indicated under “RESEARCH LOCATION” above.   nominal McH1=hayed every year north of Patmos Rd | EPH=east of Perry's land and between Sawyer Creek and Patmos Rd hayed every two years last hayed in 1999 | PUH=Perry Unhayed between Sawyer Creek and Patmos Rd | Club Creek=south of Stackyard Rd and bounded on its E side by the PRNWR        
Interval distance in meters along transect that quadrat was placed down meter ratio   real      
Date date plants harvested (DD-MMM-YY)   datetime     dd-mmm-yyyy    
YEAR Year of collections   datetime     yyyy    
Observers names of people who collected data and samples (refer to "Notes" field for abbreviations)   nominal RB=Robert Buchsbaum | WD =Wendy Dalia | AR =April Ridlon | PB =Peter Britz | CN =Carl Noblett        
Quadrat size size of sampling quadrat in m2 (either 0.01 or 0.0625) squareMeter ratio   real      
sabiomassM2 biomass (in grams per m2) of Spartina alterniflora gramsPerSquareMeter ratio   real      
sapcover percent cover of Spartina alterniflora in the biomass quadrats percent ratio   real      
saheight height (in cm) of tallest Spartina alterniflora in the quadrat centimeter ratio   real      
spbiomassM2 biomass (in grams per m2) of Spartina patens gramsPerSquareMeter ratio   real      
sppcover percent cover of Spartina patens percent ratio   real      
SPHEIGHT canopy height of Spartina patens centimeter ratio   real      
dsbiomassM2 biomass (in grams per m2) of Distichlis spicata gramsPerSquareMeter ratio   real      
dspcover percent cover of Distichlis spicata percent ratio   real      
DSHEIGHT canopy height of Distichlis spicata centimeter ratio   real      
jgbiomassM2 biomass (in grams per m2) of Juncus gerardii gramsPerSquareMeter ratio   real      
jgpcover percent cover of Juncus gerardii percent ratio   real      
JGHEIGHT canopy height of Juncus gerardi centimeter ratio   real      
sebiomassM2 biomass (in grams per m2) of Salicornia europaea gramsPerSquareMeter ratio   real      
sepcover percent cover of Salicornia europaea percent ratio   real      
SEHEIGHT canopy height of Salicornia europaea centimeter ratio   real      
apbiomassM2 biomass (in grams per m2) of Atriplex patula gramsPerSquareMeter ratio   real      
appcover percent cover of Atriplex patula percent ratio   real      
APHEIGHT canopy height of Atriplex patula centimeter ratio   real      
ifbiomassM2 biomass (in grams per m2) of Iva frutescens gramsPerSquareMeter ratio   real      
ifpcover percent cover of Iva frutescens percent ratio   real      
ssbiomasSM2 biomass (in grams per m2) of Solidago sempervirens gramsPerSquareMeter ratio   real      
sspcover percent cover of Solidago sempervirens percent ratio   real      
slbiomassM2 biomass (in grams per m2) of Suaeda linearis gramsPerSquareMeter ratio   real      
slpcover percent cover of Suaeda linearis percent ratio   real      
gMbiomass biomass (in grams per m2) of Glaux maritima gramsPerSquareMeter ratio   real      
gMpcover percent cover of Glaux maritima percent ratio   real      
aRiomassM2 biomass (in grams per m2) of Agropyron repens gramsPerSquareMeter ratio   real      
aRcover percent cover of Agropyron repens percent ratio   natural      
deadbiomassM2 biomass (in grams per m2) of standing dead plant material gramsPerSquareMeter ratio   real      
Comments Additional notes   nominal