Disturbance

Information associated with disturbance in ecology research

Hach, OTT RLS measurements of water column depth at 15 minute intervals in the lower Plum Island Sound off the Ipswich Bay Yacht Club pier, Ipswich, MA, year 2016

Abstract: 

Measurements of water column depth at 15 minute intervals in Plum Island Sound at the Ipswich Bay Yacht Club, for year 2016. OTT radar level sensor (RLS) installed September 20, 2011 out of the water under the concrete pad on the Ipswich Bay Yacht Club pier, Ipswich, MA. RLS was mounted so that continuous year round measurements can be conducted without the concern of ice flows damaging the sensor.

Short Name: 
MON-SO-IBYCRLS2016
Dataset ID: 
416
Maintenance: 

Collection on going

Version 01: January 25, 2017, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jul2016.xlsm 7/20/16 5:08 PM for QA/QC to EML 2.1.0

Personnel Involved
Owner: 
Associated Researcher: 
Geo Temporal Info
Publication Date: 
2017-01-01
Date Range: 
Fri, 2016-01-01 - Sat, 2016-12-31
Methods
Methods: 

RLS water level install,IBYC, 9/20/11 Hap Garritt, Sam Kelsey(MBL) Nichole Halsey, RonanO’Maitu (Hach)
Used Growler boat at high tide to attach 2 x 6 pressure treated wood underneath pier platform between pilings.
Wood will be used to attach the RLS. Wood attached with concrete adhesive and concrete screws. RLS attached to wood with screws and leveled with shingle shims. RLS cable attached to 2x4 wood which was secured along concrete. Cable attached to eye screws using cable ties.

Measured distances
Pier deck to sediment bottom, deck near logger down to bottom by floating dock directly downstream of logger/deck railing = 22.45 ft or 6.84 meters

RLS height above pier deck = 33 inches or 0.838 meters
IBYC NAVD88 benchmark/pier deck by datalogger = 2.78 meters, as determined by Trimble high precision GPS.

2016 High precision GPS survey, IBYC NAVD88 benchmark/pier deck by datalogger = 2.790 meters, new pier joists and decking at IBYC , late spring 2015
2010 High precision GPS survey, IBYC NAVD88 benchmark/pier deck by datalogger = 2.773 meters
2009 High precision GPS survey, IBYC NAVD88 benchmark/pier deck by datalogger = 2.811 meters
2008 High precision GPS survey, IBYC NAVD88 benchmark/pier deck by datalogger = 2.779 meters
2007 High precision GPS survey, IBYC NAVD88 benchmark/pier deck by datalogger = 2.780 meters

Calculated distances RLS to sediment bottom = 6.84 + .838 = 7.68 meters

RLS relative to NAVD88 = 3.618 meters  (2.78 + 0.838)

The OTT RLS sensor technology is based on impulse radar. Two antennas are enclosed in a compact housing and transmit pulses toward the water surface, through a Teflon face plate. The transmitting antenna transmits short radar pulses in the 24 GHz ISM band. The receiving antenna receives the pulses reflected from the water surface to determine the distance between the face plate of the radar sensor and the water surface. The time delay from transmission to receipt is proportional to the distance between sensor and water surface. Approximately 16 individual measurements are conducted per second and averaged after 20 seconds to minimize wave influences. There may be sporadic instances of no data (documented in Comments field of the data) due primarily to low battery voltage over several days causing the datalogger to malfunction.

Data File: 

MON-SO-IBYCRLS2016_csv

Description: 
Hach, OTT RLS measurements of water column depth at 15 minute intervals in the lower Plum Island Sound off the Ipswich Bay Yacht Club pier, Ipswich, MA, year 2016
Data File: 
Number of Header Lines: 
1
Orientation: 
Column
Field Delimiter: 
,
Geo-references, Variables and Data sets

Rates of benthic metabolism and nutrient cycling in the Parker and Rowley Rivers of the Plum Island Sound estuary.

Abstract: 

Rates of benthic metabolism and nutrient cycling in the Parker and Rowley Rivers of the Plum Island Sound estuary. Measurements include those conducted at two sites in the Parker River in Spring (high river discharge) and Fall (low discharge) for long-term monitoring, also at other sites throughout the estuary over a variety of seasons and salinities.

Short Name: 
BEN-PR-Flux
Dataset ID: 
1
Maintenance: 

Version 01 contained data through 29 Sept 2003.
Version 02 updates the dataset through 12 Sept 2006.
Version 03 updated/edited latitude and longtitude locations
Version 04 21Jan2010 updated metadata and data
Version 05: October 24, 2012, updated research site metadata. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/23/12 12:08 PM for QA/QC to EML 2.1.0.
Version 06: 12Sep2013, data update with metadata and data updated to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Sep2013.xlsm 9/10/13 12:02 PM for QA/QC to EML 2.1.0
Version 07: March 8, 2016, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Mar2016.xlsm 3/07/16 3:34 PM for QA/QC to EML 2.1.0

Personnel Involved
Geo Temporal Info
Publication Date: 
2000-01-01
Date Range: 
Tue, 1993-06-15 - Tue, 2014-09-02
Methods
Methods: 

Benthic respiration and nutrient fluxes are measured in sediment cores incubated in the dark and at in situ temperatures in the laboratory. Incubation duration iss determined by the time required for oxygen concentrations to fall by 2 to 5 mg O2 L-1 but remain above 50% of saturation (generally 6 to 48 hrs). Dissolved inorganic nitrogen and phosphorus are measured at at least 4 time points concurrent with O2 measurements. At the beginning and end of the incubation period, samplesare taken for total CO2 (TCO2 or DIC) analyses. Dissolved organic carbon (DOC), total dissolved nitrogen (TDN), N2O, and methane (CH4) were also measured during some fluxes.

Benthic respiration (based on O2, CO2 or CH4) and nutrient flux across the sediment-water interfaceare calculated as the slope of the constituent concentration versus time. By convention, positive values indicate efflux (constituent released from the benthos) and negative values indicate influx (constituent taken up by the benthos). Respiration values were corrected for changes in the water overlying the cores by subtracting constituent consumption measured in BOD bottles. Values are means of 2 to 4 cores, and standard errors (S.E.) represent the error of the mean.

NOTES AND COMMENTS:
As indicated above, the benthic flux dataset is a derived dataset. That is, the values presented may be several calculation steps away from the raw data. Potential users are advised to contact one of the principle investigators for details.

1. At Stations BEN-PR-P22 and BEN-PR-P14, some flux incubationswere run to look at the differences between fluxes during high versus low tides. These parallel fluxes began in October, 1999 for Station BEN_PR_P22 and in April 2001 for BEN_PR_P14 and were discontinued after September, 2004. Sediment cores were incubated with overlying water collected to represent high tide and low tide conditions at each site. In the data, the parallel fluxes are distinguished by the salinity value listed.

2. To look at the duration of a salinity effect on fluxes, cores from Station BEN_PR_P22 in May, 2000, were incubated twice, with the second incubation starting 5 days after the first. During the second incubation, only O2, TCO2, and NH4 fluxes were measured.

3. NA in data cell indicates data are not available.

4. TBA in data cell refers to "to be analyzed".

Site (Current Name) , Site (Previous Name)
BEN-PR-P22, BEN-PR-P2
BEN-PR-P22 (Intertidal), BEN-PR-P2 (Intertidal)
BEN-PR-P24.2, BEN-PR-P0
BEN-PR-P24 , BEN-PR-P1
BEN-PR-P14 , BEN-PR-P5
BEN-PR-P11 , BEN-PR-TL
BEN-RO-R5.5 , BEN-SO-Row
BEN-PR-P23.5 , BEN-PR-E0
BEN-PR-P23.5 (Intertidal), BEN-PR-E0 (Intertidal)
BEN-EG-E13, BEN-RO-R13
BEN-EG-E13.5, BEN-RO-R13.5
BEN-EG-E14, BEN-RO-R14

Data File: 

BEN-PR-Flux_csv

Description: 
Rates of benthic metabolism and nutrient cycling in the Parker and Rowley Rivers of the Plum Island Sound estuary.
Data File: 
Number of Header Lines: 
1
Orientation: 
Column
Field Delimiter: 
,
Geo-references, Variables and Data sets

Biomass and shoot densities of marsh grasses at hayed and reference sites for samples collected in June and early July 2000

Abstract: 

Biomass and shoot densities of dominant marsh grasses at hayed and reference sites for samples collected in June and early July 2000 at hayed and reference marsh sites near Stackyard Rd. and Patmos Rd, Rowley, Massachusetts

Short Name: 
LTE-MD-EARLYVEG
Dataset ID: 
23
Maintenance: 

Version 01: initial Excel to EML metadata
Version 02: keyword update
Version 03: March 7, 2016, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Mar2016.xlsm 3/07/16 3:34 PM for QA/QC to EML 2.1.0

Personnel Involved
Owner: 
Geo Temporal Info
Publication Date: 
2001-01-01
Date Range: 
Mon, 2000-06-05 - Thu, 2000-07-06
Methods
Methods: 

Shoot densities and biomass of individual species within four vegetation zones (Spartina alterniflora, S. patens, Distichlis spicata, Juncus gerardi) were compared at four marsh sites (2 hayed and 2 reference).

Sampling was carried out by placing three 0.1 m2 quadrats within identified vegetation zones at each marsh site. Plants were clipped at the surface of the substrate and then divided into live and dead material. The live plants were further separated into individual species. The number of shoots per species per quadrat was determined by counting individual shoots. After counting, plant material was dried at 60oC to constant weight (about 48 hrs) and the plants weighed on an electronic balance.

NOTES AND COMMENTS: Vegetation zones were determined visually and were therefore somewhat subjective. Abbreviations for “Collector” RB (Robert Buchsbaum), AC (Amy Chiuchiolo), LD (Linda Deegan), JH (Julie Horowitz), MM (Maria Mensching), GDA (Governor Dummer students)

Data File: 

LTE-MD-EARLYVEG_csv

Description: 
Biomass and shoot densities of marsh grasses at hayed and reference sites for samples collected in June and early July 2000
Data File: 
Number of Header Lines: 
1
Orientation: 
Column
Field Delimiter: 
,
Geo-references, Variables and Data sets

Marsh vegetation cover data from quadrats along transects through two hayed and two reference sites near Stackyard Rd, Rowley, MA

Abstract: 

Marsh vegetation cover data from quadrats along transects through two hayed and two reference sites in the vicinity of Stackyard Road and Patmos Road, Rowley, MA.

Short Name: 
LTE-MD-VEGQUADS
Dataset ID: 
25
Maintenance: 

Version 01, initial Excel to EML metadata
Version 02 keyword update
Version 03: January 23, 2012, updated data and metadata through 2010. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/18/12 4:51 PM for QA/QC to EML 2.1.0
Version 04: February 25, 2016, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0
Version 05: January 17, 2017, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jul2016.xlsm 7/20/16 5:08 PM for QA/QC to EML 2.1.0

Personnel Involved
Owner: 
Geo Temporal Info
Publication Date: 
2002-01-01
Date Range: 
Mon, 2000-08-07 - Wed, 2016-10-19
Methods
Methods: 

0.2m x 1m quadrats were placed down at 5m intervals along transect lines typically starting at edge of a marsh creek and running perpendicular to upland. Percent covers are estimated visually.

NOTES AND COMMENTS:
Names of observers: RB (Robert Buchsbaum), HG (Hap Garritt), WD (Wendy Dalia), ADR (April Ridlon), SO (Susan Olesko), SGR (Sam Gale Rosen), LD (Elizabeth Duff), CN (Carl Noblett), MS (Madeline Sheintaub), SP (Simon Panall). Carl, Madeline, and Simon were Gov. Dummer students.

Data File: