Coastal eutrophication as a driver of salt marsh loss

  title={Coastal eutrophication as a driver of salt marsh loss},
  author={Linda Deegan and David Samuel Johnson and R. Scott Warren and Bruce J. Peterson and John W. Fleeger and S. Fagherazzi and Wilfred M. Wollheim},
Salt marshes are highly productive coastal wetlands that provide important ecosystem services such as storm protection for coastal cities, nutrient removal and carbon sequestration. Despite protective measures, however, worldwide losses of these ecosystems have accelerated in recent decades. Here we present data from a nine-year whole-ecosystem nutrient-enrichment experiment. Our study demonstrates that nutrient enrichment, a global problem for coastal ecosystems, can be a driver of salt marsh… 
Eutrophication decreases salt marsh resilience through proliferation of algal mats
Microbial Communities in Salt Marsh Systems and Their Responses to Anthropogenic Pollutants
  • J. Coombs
  • Environmental Science
    Advances in Environmental Microbiology
  • 2019
Salt marshes are vegetated terrestrial systems that develop along coastlines in temperate to arctic environments, in areas where surface or groundwater mixes with flooding from coastal tides. These
Are Tidal Salt Marshes Exposed to Nutrient Pollution more Vulnerable to Sea Level Rise?
Over the past four decades, Long Island, NY, USA, has lost coastal wetlands at a rate of 4% per decade due to submergence. In this study, we examined relationships between the rate of tidal salt
Marsh Plants Enhance Coastal Marsh Resilience by Changing Sediment Oxygen and Sulfide Concentrations in an Urban, Eutrophic Estuary
Despite considerable efforts to restore coastal wetlands, the ecological mechanisms contributing to the success or failure of restoration are rarely assessed. Accumulation of hydrogen sulfide in
Vegetation Loss Decreases Salt Marsh Denitrification Capacity: Implications for Marsh Erosion.
Overall, the findings indicate that marsh loss results in a substantial loss of N removal capacity in coastal ecosystems.
Denitrification Capacity of a Natural and a Restored Marsh in the Northern Gulf of Mexico
Denitrification rates across a typical northern Gulf of Mexico salt marsh landscape that included a natural marsh, a tidal creek, and a 21-year-old restored salt marsh suggest that marsh restoration projects reestablish nitrogen removal capacity at rates similar to those in natural systems and can help to significantly reduce nitrogen loads to the coastal ocean.
Transient coastal landscapes: Rising sea level threatens salt marshes.
Salinity pulses interact with seasonal dry-down to increase ecosystem carbon loss in marshes of the Florida Everglades.
  • B. Wilson, S. Servais, T. Troxler
  • Environmental Science
    Ecological applications : a publication of the Ecological Society of America
  • 2018
Elevated salinity pulses interacted with marsh-specific variability in seasonal hydroperiods whereby effects of elevated pulsed salinity on gross ecosystem productivity, ecosystem respiration, and net ecosystem productivity were dependent on marsh inundation level.
Nonlinear responses in salt marsh functioning to increased nitrogen addition.
Overall, the study suggests salt marshes are limited in their ability to sequester C and N with future increases in N, even without further losses in marsh area.


Anthropogenic and climate-change impacts on salt marshes of Jamaica Bay, New York City
Field studies and aerial photograph interpretation suggest that large sections of Jamaica Bay salt marshes in New York City near John F. Kennedy International Airport are deteriorating rapidly. The
Salt marsh ecosystems have been considered not susceptible to nitrogen overloading because early studies suggested that salt marshes adsorbed excess nutrients in plant growth. However, the possible
Numerical models of salt marsh evolution: Ecological, geomorphic, and climatic factors
Salt marshes are delicate landforms at the boundary between the sea and land. These ecosystems support a diverse biota that modifies the erosive characteristics of the substrate and mediates sediment
High-marsh invertebrates are susceptible to eutrophication
Results suggest that despite being infrequently flooded and thus infrequently exposed to elevated nutrients, high-marsh invertebrates are susceptible to eutrophication, and the high marsh should be integrated into the understanding of how eUTrophication impacts saltmarsh functioning.
Lessons learned: The effects of nutrient enrichment on the support of nekton by seagrass and salt marsh ecosystems
Coastal ecosystems such as eelgrass beds and salt marshes have always been valued for their high productivity and rich bounty of fish and shellfish. High plant productivity, complex physical
Habitat-specific distinctions in estuarine denitrification affect both ecosystem function and services
Resource limitation controls the base of food webs in many aquatic ecosystems. In coastal ecosystems, nitrogen (N) has been found to be the predominant limiting factor for primary producers. Due to
Beneath the Salt Marsh Canopy: Loss of Soil Strength with Increasing Nutrient Loads
Although the broadly observed increase in nutrient loading rates to coastal waters in the last 100 years may increase aboveground biomass, it also tends to increase soil metabolism and lower root and
Increased supply of ambient nitrogen has minimal effect on salt marsh bacterial production
We examined the role of chronic low‐level nutrient enrichment on the productivity of heterotrophic marsh bacteria via a marsh fertilization experiment in which we mimicked the conditions of