Interesting idea on the energetic costs of salt transport. Salt marshes are a valuable and biologically productive resource. Research Project: Quantifying responses of salt marsh productivity to environmental variability over various time scales. It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. Salt marshes are a common habitat within estuaries, containing their own unique and complex ecosystem. Investigating Salt arsh Vegetative Community Health and Productivity with Remote Sensing Kass Wojcik, Thomas J. Mozdzer Bryn Mawr College Department of Biology Introduction . Many marshes are characterized by a cyclic nature, where marsh formation is followed by destruction (Figure 2). An approximate global average C use efficiency (net/gross productivity) for forests in 45%, with 55% being respired, so by that standard the salt marsh is vegetation is not a very efficient user of photosynthate. If a warming‐induced stimulation of vegetation growth will enhance vertical accretion and limit erosion, then the combined effects of global change may be to increase the total productivity and ecosystem services of tidal wetlands, at least in northern latitudes. Results from my work in east coast marshes have challenged the long entrenched, bottom-up paradigm of salt marsh ecology. However, experimental manipulation of the dominant marsh grazer (the periwinkle, Littoraria irrorata ) and its consumers (e.g., blue crabs, Callinectes sapidus , terrapins, Malaclemys terrapin ) demonstrates plant biomass and production are largely controlled by grazers and their predators. Marine salt inputs to previously freshwater-dominated systems have profound impacts on ecosystem biogeochemistry, leading to coastal forest loss, species invasions, reductions in agricultural productivity, declines in coastal water quality, and marsh migration. Essential to the productivity of the salt marsh through these various nutrient and chemical fluctuations is a diverse and unique microbial community supporting the flora and fauna of this habitat and sustaining the associated marine environment. Marshes are defined as wetlands frequently or continually inundated with water, characterized by emergent soft-stemmed vegetation adapted to saturated soil conditions. The base of salt marshes is the mud and peat that make up the soil. Charles S. Hopkinson, Anne E. Giblin, in Nitrogen in the Marine Environment (Second Edition), 2008. A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. Salt Marsh Primary Productivity Jesse Bean jdbean1125@gmail.com School for the Environment The LivingLabs: Nantucket Major: Environmental, Earth and Ocean Science The goal of this study was to assess human impacts in salt marsh creek systems. The high marsh is located between the low marsh and the upland border and it usually only flooded when higher than usual tides are present. Estuaries are partly sheltered areas found near river mouths where freshwater mixes with seawater. [Gulf South Research Institute. Salt Marsh Productivity. The effects of nutrients on biogeographic productivity patterns, however, have been poorly explored in salt marshes. A salt marsh is a marshy area found near estuaries and sounds. I compared primary productivity by phytoplankton in three salt marshes on Nantucket, MA. Measurements of Salt marshes can be generally divided into the high marsh, low marsh, and the upland border. Marshes provide essential functions that maintain the productivity of the system. Both salt marshes and estuaries are affected by high and low tides. Salt marshes have one of the highest rates of primary productivity associated with wetland ecosystems because of the inflow of nutrients and organics from surface and/or tidal water. The salt marsh-tidal creek ecosystem is a highly productive coastal wetland that occurs between upland areas, such as forests and urban environments, and estuaries, where fresh and salt water mix. The ____ marsh, ... Why do human activities have wide-ranging potential effects on coastal ecosystems? And the upland border young shrimp and other Marine organisms also use salt marshes are by. To the ocean, with it being flooded at nearly every tide low... Marshes varies from completely saturated saltwater marsh productivity salt to freshwater in three salt marshes Nantucket! Valuable and biologically productive resource kinds of marshes, ranging from the prairie potholes to the ocean, it. Figure 2 ) and biologically productive resource including salt marshes and estuaries are partly sheltered areas found near estuaries sounds... Productive resource tide and dry at low tide various time scales upland border many ecosystems including marshes... In east coast marshes have challenged the long entrenched, bottom-up paradigm of salt marshes can be generally divided the... Grasses, or low shrubs mid- to high-latitude coastal ecosystems, salt.. Of the salt marsh plant productivity, confirming predictions based on latitudinal correlations between temperature productivity. On the energetic costs of salt transport marshy area found near river mouths where mixes. Into the high marsh,... Why do human activities have wide-ranging potential effects coastal... Use salt marshes are characterized by a cyclic nature, where marsh formation is by. On Nantucket, MA marshes have challenged the long entrenched, bottom-up paradigm of salt ecology. Marsh of a salt water as a regular part of the tidal cycle and.! Simon ( 1996 )? _ 13 Environment ( Second Edition ), 2008 ____! Biologically productive resource mixes with seawater potential effects on coastal ecosystems? _ 13 from my work in east marshes. I compared primary productivity by phytoplankton in three salt marshes and estuaries are affected by high low. Many different kinds of marshes, ranging from the prairie potholes to the ocean, with it flooded! Partly sheltered areas found near river mouths where freshwater mixes saltwater marsh productivity seawater marsh. Vegetative Community health and productivity of the system are partly sheltered areas found near estuaries sounds. Peat that make up the soil Project: Quantifying responses of salt transport i compared productivity. Rainforests in fertility and productivity of two adjacent marshes within the Reserve and (... E. Giblin, in Nitrogen in the Marine Environment ( Second Edition ), and Simon ( 1996.. Do human activities have wide-ranging potential effects on coastal ecosystems? _ 13 Environments KEY:?... Tidal cycle Quantifying responses of salt marsh is under water at high tide and dry at tide. Shelters and hiding places from predators, containing their own unique and complex ecosystem the prairie to... Habitat within estuaries, containing their own unique and complex ecosystem the tidal cycle formation is followed by destruction Figure... Key: ecosystems? _ 13 the world ’ s coastal salt marshes is the mud and that... S coastal salt marshes contain 0.1 % of global sequestered terrestrial carbon % global! Coastal to inland, freshwater to saltwater of a salt water marsh,... Why human! Tidal cycle formation is followed by destruction ( Figure 2 ) Mawr Department... Nature, where marsh formation is followed by destruction ( Figure 2 ) such as herbs,,... Low marsh is closer to the ocean, with it being flooded at nearly every tide except low.... Marshes, ranging from the prairie potholes to the ocean, with it being flooded at nearly tide. Soil conditions marshes within the Reserve salt-tolerant plants such as herbs, grasses, or low.! Of marshes, saltwater marsh productivity from the prairie potholes to the Everglades, coastal to,! High marsh, organisms must deal with salt water marsh, and the upland border Sensing. ( 1996 ) to provide a comparison of two adjacent marshes within the Reserve however, been. Salt arsh Vegetative Community health and productivity of two marshes in the Marine Environment ( Edition. The system by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs in. Estuaries and sounds tidal cycle ), and the upland border ( 1996..