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1,515 results for “marshes”
Year 2006, Plant species present along vegetation transects off the marsh on Middle Rd, Newbury, MA. Near Thurlow's Bridge and Governor's Academy.
This study was conducted in the Fall of 2006, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the annual presence and absence of marsh plants in the tidal marsh near the Governor's Academy school campus. The marsh is brackish and is located off Middle Road in Newbury , MA , near Thurlow's Bridge.
Year 2007, Plant species present along vegetation transects off the marsh on Middle Rd, Newbury, MA. Near Thurlow's Bridge and Governor's Academy.
This study was conducted in the Fall of 2007, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the annual presence and absence of marsh plants in the tidal marsh near the Governor's Academy school campus. The marsh is brackish and is located off Middle Road in Newbury , MA , near Thurlow's Bridge.
Year 2009, Plant species present along vegetation transects off the marsh on Middle Rd, Newbury, MA. Near Thurlow's Bridge and Governor's Academy.
This study was conducted in the Fall of 2009, by Governor's Academy high school science class students with their teacher Susan Olezsko-Zsuts to look at the annual presence and absence of marsh plants in the tidal marsh near the Governor's Academy school campus. The marsh is brackish and is located off Middle Road in Newbury , MA , near Thurlow's Bridge.
Marsh water table height, logging data from the railroad Spartina marsh site on the Parker River for April-November 2012.
Measurements of water table height in the Parker River marsh located downstream of the railroad bridge. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the railroad site, MAR-PR-Wtable-RR for April-November 2012.
Marsh water table height, logging data from the railroad Spartina marsh site on the Parker River for March-November 2013.
Measurements of water table height in the Parker River marsh located downstream of the railroad bridge. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the railroad site, MAR-PR-Wtable-RR for Mar-November 2013.
Marsh water table height, logging data from the Typha marsh site on the upper Parker River for April-November 2012.
Measurements of water table height in the upper Parker River Typha sp. marsh. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the Typha site, MAR-PR-Wtable-T, for April - November 2012
Marsh water table height, logging data from the Typha marsh site on the upper Parker River for March-November 2013.
Measurements of water table height in the upper Parker River Typha sp. marsh. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the Typha site, MAR-PR-Wtable-T, for Mar - November 2013
Marsh water table height, logging data from the Typha marsh site on the upper Parker River for April-November 2014.
Measurements of water table height in the upper Parker River Typha sp. marsh. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the Typha site, MAR-PR-Wtable-T, for April - November 2014
Marsh water table height, logging data from the railroad Spartina marsh site on the Parker River for April-November 2015.
Measurements of water table height in the Parker River marsh located downstream of the railroad bridge. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the railroad site, MAR-PR-Wtable-RR for April-October 2015.
Marsh water table height, logging data from the Typha marsh site on the upper Parker River for April-November 2015.
Measurements of water table height in the upper Parker River Typha sp. marsh. Measurements were taken every 5 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the Typha site, MAR-PR-Wtable-T, for April - November 2015
Biomass of Spartina alterniflora collected in July 2018 from various marsh edges around Plum Island Sound, MA, PIE LTER.
Biomass of Spartina alterniflora was collected at various locations within the Plum Island Sound estuary. Samples were collected during July 2018. Only Spartina alterniflora was collected. To collect biomass, 25 X 25 cm quadrats were placed over the plants. Aboveground biomass was clipped to soil surface. Biomass was dried in the lab in a drying oven until a constant weight was reached, and then weighed. Biomass values were then convertedto grams of dry weight per square meter (g/m2).
PIE LTER extensometer measurements of marsh bank sediment deformation, soil creep in West Creek, Rowley, MA.
Muddy banks of marsh channels experience soil creep – a viscous-like slow deformation resulting in a net downslope transport. Here we present the first field evidence of soil creep in a mesotidal salt marsh using high precision measurements of soil deformation taken with a vibrating-wire extensometer over two years.
PIE LTER bird observations associated with marsh sites used in space for time sea level rise study, Rowley, MA.
This dataset contains observations of birds foraging at high and low tide at space for time substition plots in tidal creek marshes off the Rowley River and Plum Island Sound in Rowley Massachusetts. The space for time study uses an intensive and comprehensive approach to compare low elevation, Spartina alterniflora marsh areas to higher elevation Spartina patens marsh areas. Birds were observed using timed interval observations, with one sampling bout per tide per site. Other related data files include: HTL-RO-ST-MAR-Sites, HTL-RO-ST-MAR-Biomass, HTL-RO-ST-MAR-Quads, HTL-RO-ST-MAR-Sediments, HTL-RO-ST-MAR-Bites, HTL-RO-ST-MAR-Sticky, HTL-RO-ST-MAR-Decomp, HTL-RO-ST-MAR-Traps, HTL-RO-ST-MAR-Deep_pitfalls
PIE LTER predation and herbivory rates associated with marsh sites used in space for time sea level rise study, Rowley, MA.
This dataset contains aggregated observations of predation and herbivory rates on tethered bait in each quadrat of the space for time substitution observations in salt marsh sites in Rowley and Newbury, MA.
Fiddler crab body size in salt marshes from Florida to Massachusetts, USA at PIE and VCR LTER and NOAA NERR sites during summer 2016.
Bergmann’s rule predicts that organisms at higher latitudes are larger than ones at lower latitudes. Here, we examine the body-size pattern of the Atlantic fiddler crab, Minuca (=Uca) pugnax, from salt marshes on the east coast of the United States across 12 degrees of latitude. We found that M. pugnax followed Bergmann’s rule and that, on average, crab carapace width increased by 0.5 mm per degree of latitude. Minuca pugnax body size also followed the temperature-size rule with body size inversely related to mean water temperature. Because an organism’s size influences its impact on an ecosystem, and Minuca pugnax is an ecosystem engineer that affects marsh functioning, the larger crabs at higher latitudes may have greater per-capita impacts on salt marshes than the smaller crabs at lower latitudes.
PIE LTER diel surface water chemistry of two high marsh ponds, Rowley, MA, during the summer of 2016.
We measured diel fluctuations in surface water chemistry of two high marsh ponds in July 2016. The ponds are shallow and experience day-night swings in oxygen concentrations, from super-saturation to anoxia. Our goal was to characterize changes in geochemical properties and dissolved organic carbon concentrations that accompany wide swings in oxygen concentrations. These data provide information about the responsiveness of microbial communities and how the dominance of redox-sensitive metabolisms changes over short time scales (e.g., hours) to feed back on pond water chemistry.
PIE LTER benthic microalgal biomass in fiddler-crab plots in a salt marsh of West Creek, Rowley, MA.
It is well known that species across the world are expanding or shifting their ranges because of climate change. Yet, we know little about their impact on the habitats they colonize. In an observational study, we examined the effect of the fiddler crab Minuca pugnax (Smith, 1870) on benthic microalgal biomass in salt marshes in its expanded range (northeastern Massachusetts, USA). We found that plots with M. pugnax had, on average, 74% lower diatom biomass and 77% lower cyanobacteria biomass than plots without M. pugnax. Our results indicate that this climate migrant can impact saltmarsh functioning by limiting benthic microalgal biomass. See: Johnson, D.S., K.S. Martínez-Soto, S. Wittyngham, M. Pant, and E. Goetz. 2020. The fiddler crab Minuca pugnax (Smith, 1870) (Decapoda: Brachyura: Ocypodidae) reduces saltmarsh algae in its expanded range. Journal of Crustacean Biology 40: 668-672
PIE LTER, parasites of the fiddler crab, Minuca pugnax, on east coast salt marshes of the USA.
When a species colonizes a new range, it can escape enemies found in its original range. Examples of enemy escape abound for invasive species, but are rare for climate migrants, which are populations of a species that colonize a new range due to climate-driven range shifts or expansions. The fiddler crab Minuca (=Uca) pugnax is found in the intertidal salt marshes of the US east coast. It recently expanded its range north into the Gulf of Maine as a result of ocean warming. We tested the hypothesis that M. pugnax had escaped its parasite enemies. Parasite richness and trematode intensity were lower in populations in the expanded range than in populations in the historical range, but infection prevalence did not differ. Although M. pugnax escaped most of its historical parasites when it migrated northward, it was infected with black-gill lamellae (indicative of Synophrya hypertrophica), which was found in the historical range, and with the trematode Odhneria cf. odhneri, which was not found in the historical range. To our knowledge, this is the first time that O. cf. odhneri has been reported in fiddler crabs. These results demonstrate that although M. pugnax escaped some of its historical parasites when it expanded its range, it appears to have gained a new parasite (O. cf. odhneri) in the expanded range. Overall, our results demonstrate that climate migrants can escape their enemies despite colonizing habitats adjacent to their enemy-filled historical range. See Johnson et al. 2020. A climate migrant escapes its parasites. Marine Ecology Progress Series 641: 111-121 for more details.
End of Year Biomass at Surface Elevation Table plots in Upper Phillips Creek marsh 1999-2017
Background: Brinson et al. (1995) developed a model representing the change that occurs in ecosystem state (or habitat type) along the shorezone, from the forest -> high marsh -> low marsh -> mud flat, in response to the increased inundation caused by rising sea-level. They suggested that a seaward shift in ecosystem state is largely dependent on local slope and sediment supply. The states are associated with the dominant vegetation found within each. The most seaward (lowest in elevation) state is the mud flat. It is frequently inundated by tide and typically supports algal species. The next landward state is the mineral low marsh; it is dominated by Spartina alterniflora and is typically flooded at high tide. Sediments here may be largely mineral in origin. The next landward state is the high marsh; it may be dominated by S. patens, Distichlis spicata, and Juncus roemerianus. It is occasionally inundated by high tides and the soil is usually organic. The transition zone between the high marsh and the forest is typically dominated by Iva frutescens, Baccharis hamifolia, and Juniperus virginiana. It is only inundated during severe storm surges. The forest may be dominated by either pines or hardwoods and is again flooded with sea water only by storm surges. Brinson, M.M., R.R. Christian, and L.K. Blum. 1995. Multiple states in the sea-level induced transition from terrestrial forest to estuary. Estuaries 18:648-659.
End of Year Biomass in marsh transition plots in Upper Phillips Creek marsh 1999-2014
Background: Brinson et al. (1995) developed a model representing the change that occurs in ecosystem state (or habitat type) along the shorezone, from the forest -> high marsh -> low marsh -> mud flat, in response to the increased inundation caused by rising sea-level. They suggested that a seaward shift in ecosystem state is largely dependent on local slope and sediment supply. The states are associated with the dominant vegetation found within each. The most seaward (lowest in elevation) state is the mud flat. It is frequently inundated by tide and typically supports algal species. The next landward state is the mineral low marsh; it is dominated by Spartina alterniflora and is typically flooded at high tide. Sediments here may be largely mineral in origin. The next landward state is the high marsh; it may be dominated by S. patens, Distichlis spicata, and Juncus roemerianus. It is occasionally inundated by high tides and the soil is usually organic. The transition zone between the high marsh and the forest is typically dominated by Iva frutescens, Baccharis hamifolia, and Juniperus virginiana. It is only inundated during severe storm surges. The forest may be dominated by either pines or hardwoods and is again flooded with sea water only by storm surges. Brinson, M.M., R.R. Christian, and L.K. Blum. 1995. Multiple states in the sea-level induced transition from terrestrial forest to estuary. Estuaries 18:648-659.
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