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 effluent enrichment 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; inorganic nutrients; disturbance; population dynamics; salt marsh, nutrients, enrichment, nitrogen, fertilization, vegetation, wastewater, biomass
Abstract:End of growing season percent cover and biomass data for effluent enrichment 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 9/19/2002
End Date 10/7/2002
Number of Data Records 67
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 Greenwood Creek in the town of Ipswich is the site of nutrient enrichment studies. It receives direct effluent from the Ipswich Wastewater Treatment Facility. Five transects were set up there in 2002 to study vegetation. Two transects at Clubhead Creek, which is off Stackyard Road in the town of Rowley, has been used as a reference marsh for the haying study, this study, and the TIDE (tidal creek fertilization) study. See LTE-MF-GREENWOOD CLUBHEAD VEGSTN.xls for locations of transects.  
Location Bounding Box    
West Bounding Coordinate -70.822  
East Bounding Coordinate -70.8184  
North Bounding Coordinate 42.6908  
South Bounding Coordinate 42.6915  
OR if single point location    
Taxonomic Protocols
Organisms studied Spartina alterniflora; Spartina patens; Distichlis spicata; Juncus gerardi; Salicornia europae; Atriplex patula; Iva frutescens; Solidago sempervirens; Suaeda linearis; Glaux maritima; Agropyron repens; Phragmites australis; Scirpus robustus; Panicum virgatum; Agrostis stolonifera
Methods:Samples for biomass measurements were collected along transects in the enriched (Greenwood) and reference (Clubhead) marshes. These are the same transects used in LTE-MF-VEGTRANS.xls and LTE-MF-VEGQUADS. Five transects varying from 25 to 50 m depending on the shape of the marsh were set up in 2002. Transects ran from the edge of Greenwood Creek to the upland. Transects at Clubhead Creek ran ca. 150 m from the edge of the creek to the upland near Stackyard Rd. Quadrats (either 0.01 or 0.0441 m2) were placed down at 5 m intervals along the Greenwood transect and 10 m along the Clubhead 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), HG (Hap Garritt).
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 outfall of the wastewater plant provides high nutrients and freshwater in the vicinity of the Greenwood Creek transects.
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-MF-VEGQUADS 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, enriched or reference area   nominal          
TRANSECT Transect line along which plants were observed and collected. Code names are indicated under “RESEARCH LOCATION” above.   nominal          
Interval distance in meters along transect that quadrat was placed down meter ratio   real      
Date date plants harvested (DD-MMM-YYYY)   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 | HG = Hap Garritt        
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      
spbiomassM2 biomass (in grams per m2) of Spartina patens gramsPerSquareMeter ratio   real      
sppcover percent cover of Spartina patens percent ratio   real      
dsbiomassM2 biomass (in grams per m2) of Distichlis spicata gramsPerSquareMeter ratio   real      
dspcover percent cover of Distichlis spicata percent ratio   real      
jgbiomassM2 biomass (in grams per m2) of Juncus gerardii gramsPerSquareMeter ratio   real      
jgpcover percent cover of Juncus gerardii percent ratio   real      
sebiomassM2 biomass (in grams per m2) of Salicornia europaea gramsPerSquareMeter ratio   real      
sepcover percent cover of Salicornia europaea percent ratio   real      
apbiomassM2 biomass (in grams per m2) of Atriplex patula gramsPerSquareMeter ratio   real      
appcover percent cover of Atriplex patula percent 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   real      
pabiomassm2 biomass (in grams per m2) of Phragmites australis gramsPerSquareMeter ratio   real      
papcover percent cover of Phragmites australis percent ratio   real      
SCRBIOMASSM2 biomass (in grams per m2) of Scirpus robustus gramsPerSquareMeter ratio   real      
SCRPCOVER percent cover of Scirpus robustus percent ratio   real      
PVBIOMASSM2 biomass (in grams per m2) of Panicum virgatum gramsPerSquareMeter ratio   real      
PVPCOVER percent cover of Panicum virgatum percent ratio   real      
ASBIOMASSM2 biomass (in grams per m2) of Agrostis stolonifera gramsPerSquareMeter ratio   real      
ASPCOVER percent cover of Agrostis stolonifera percent ratio   real      
deadbiomassM2 biomass (in grams per m2) of standing dead plant material gramsPerSquareMeter ratio   real      
Comments Additional notes   nominal