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Change in marsh surface elevation measured with a Surface Elevation Table (SET) at control plots in a Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem LTER, MA.

A Surface Elevation Table (SET) is used to measure changes in the elevation of the marsh platform at a Spartina alterniflora-dominated marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site, MA.

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Change in marsh surface elevation measured with a Surface Elevation Table (SET) at control plots in a Spartina patens-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem LTER, MA.

A Surface Elevation Table (SET) is used to measure changes in the elevation of the marsh platform at a Spartina patens-dominated marsh on the Rowley River in the Plum Island Ecosystem (PIE) LTER site, MA.

Year 2000, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.

This study was conducted during the Summer of 2000, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.

Year 2001, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.

This study was conducted during the Summer of 2001, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.

Year 2002, mussel and snail surveys of tidal creeks on the Rowley River, Massacusetts.

This study was conducted during the Summer of 2002, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the distriibution of mussels and snails in a variety of tidal creeks off the Rowley River, Rowley and Ipswich Massachusetts.

Sediment profiles of dissolved oxygen and nitrous oxide along with temperature and sediment water content, Rowley River, Rowley, MA

Environmental pulses, or sudden, marked changes to the conditions within an ecosystem, can be important drivers of resource availability in many systems. In this study, we investigated the effect of tidal pulsing on the fluxes of nitrous oxide (N2O), a powerful greenhouse gas, from a marine intertidal mudflat on the north shore of Massachusetts, USA. We found these tidal flat sediments to be a sink of N2O at low tide with an average uptake rate of ??6.7 6 2 lmol??m??2??h??1. Further, this N2O sink increased the longer sediments were tidally exposed. These field measurements, in conjunction with laboratory nutrient additions, revealed that this flux appears to be driven primarily by sediment denitrification. Additionally, N2O uptake was most responsive to dissolved inorganic nitrogen with phosphorus (DINþDIP) addition, suggesting that the N2O consumption process may be P limited. Furthermore, nutrient addition experiments suggest that dissimilatory nitrate reduction to ammonium (DNRA) releases N2O at the highest levels of nitrate fertilization. Our findings indicate that tidal flats are important sinks of N2O, potentially capable of offsetting the release of this potent greenhouse gas by other, nearby ecosystems.

Water column nitrate and ammonium concentrations, sediment oxygen, di-nitrogen (gas), nitrate, nitrite, ammonium, phosphate, and silicate flux from sealed, whole core incubations, Rowley River, Rowley, MA.

Tidal flats are critical components of coastal estuarine ecosystems characterized by high rates of benthic primary productivity and biogeochemical cycling. In order to investigate the impact of anthropogenic nutrient loading on tidal flat biogeochemistry we carried out a two-week fertilization experiment. Throughout the course of the study we conducted two light-dark, whole-core incubations and took measurements of three indicators of microphytobenthos activity in addition to quantifying the resident eastern mud snail (Ilyanassa obsoleta) population.

Sediment porewater nutrients, sulfide, pH, and alkalinity in the Parker and Rowley River, Massachusetts

Measurements of sediment porewater nutrient, sulfide, pH, and alkalinity, 1993 -2004, at a variety of sites and salinities throughout the Plum Island Sound estuary.

Sediment redox potential in the Parker and Rowley River, Massachusetts

Measurements of sediment redox potential at 4 stations along a transect of the Parker River and near the mouth of the Rowley River, Newbury and Rowley, Massachusetts during 1993 and 1994.

Plum Island Ecosystems site, station Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA, study of aboveground net primary productivity in units of gramsPerMeterSquaredPerYear on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Plum Island Ecosystems (PIE) contains aboveground net primary productivity measurements in gramsPerMeterSquaredPerYear units and were aggregated to a yearly timescale.

Plum Island Ecosystems site, station Spartina alterniflora-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA, study of plant biomass in units of gramsPerSquareMeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Plum Island Ecosystems (PIE) contains plant biomass measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.

Plum Island Ecosystems site, station Spartina patens-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA, study of aboveground net primary productivity in units of gramsPerMeterSquaredPerYear on a yearly timescale

Plum Island Ecosystems site, station Spartina patens-dominated salt marsh at Law's Point, Rowley River, Plum Island Ecosystem, MA, study of plant biomass in units of gramsPerSquareMeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Plum Island Ecosystems (PIE) contains plant biomass measurements in gramsPerSquareMeter units and were aggregated to a yearly timescale.

Repeated erosion of sediments with biofilms from Rowley River mud flats, year 2012, Rowley, MA

This study aims to explore the interplay between biofilms and erodability of cohesive sediments. Erosion experiments were run in four laboratory annular flumes with natural sediments. Mud from the Rowley River mudflats was taken at low tide and then placed in flumes. Two of the flumes were bleach to prevent biota, while the other two were allowed to grow; nutrients were also added to the flumes. On different intervals, the flumes were eroded and the amount of erosion and velocity of the flow were measured. Additionally, each day biofilm growth was measured using Pulse-Amplitude Modulation (PAM) Underwater Fluorometry. Reported here are 10 minute averages of shear stress (derived from velocity) and suspended sediment (uncalibrated, in NTUs) along with PAM measurements. The complete dataset is available upon request via .mat files, but the dataset is quite large (kendallv@bu.edu or pie_im@mbl.edu).

Sediment chlorophyll-a, pheophytin, biogenic silica, and carbohydrate content (EPS) from the Rowley River mudflat in September 2012, Rowley, MA

Meiofaunal counts, 2003-2009, from marsh cores along Rowley River tidal creeks associated with long term fertilization experiments, Rowley, MA.

Meiofaunal counts, 2003-2009, from marsh cores along Rowley River tidal creeks associated with long term fertilization experiments, Rowley, MA. The long term fertilization experiment, TIDE project, aims to simulate eutrophication on a large scale by the addition of NO3- aiming to reach 70µM concentrations from May to September every year during the growing season. This fertilization of the marsh has been going on at Sweeney Creek since the 2004 growing season and at Clubhead Creek in 2005 and then again in 2009 .

July and August 2012, 10 minute interval, creek water temperature, salinity, oxygen, tidal stage and net ecosystem metabolism in Sweeney and West Creek off Rowley River, MA.

July and August 2012, 10 minute interval, measurements of creek water temperature, salinity, oxygen, as well as tidal stage data and net ecosystem metabolism in Sweeney Creek, Right branch (Ipswich, MA) and West Creek Left branch (IRowley, MA) tidal creeks.