Salt marsh-mangrove ecotones: using structural gradients to investigate the effects of woody plant encroachment on plant-soil interactions and ecosystem carbon pools May 19, 2016 Changing winter climate extremes are expected to result in the poleward migration of mangrove forests at the expense of salt marshes. Although …

The fine root structure of salt marsh grasses, compared to mangroves, increases soil water content and decreases soil redox potentials (Perry and Mendelssohn 2009;Comeaux et al. 2012), impacting ...

environment of established salt marshes influences es-tablishment of mangroves and (2) how belowground en-vironment shifts in response to mangrove encroachment. Using a site at the ecotone between where mangroves and salt marsh plants dominate in northeastern Florida, we have the unique opportunity to observe how variation in marsh

Abstract. Salt marsh ( Spartina alterniflora) has been rapidly encroaching into mangrove wetlands worldwide. However, the potential effects of salt marsh expansion on coastal nitrogen cycling and ecosystem function remain unclear. In this study, sediment cores were seasonally collected from mangroves, salt marshes and mudflats from 2020 …

Salt marsh-mangrove ecotones: using structural gradients to investigate the effects of woody plant encroachment on plant–soil interactions and ecosystem carbon pools. ... Synthesis: Our results indicate that the ecological implications of woody plant encroachment in tidal saline wetlands are dependent upon precipitation controls of plant ...

With rates of SLR in the region over the last 100 to 150 years of close to 3 mm/year, portions of New England salt marshes dominated by marsh hay and spike grass are accreting at between 2.0 and 2.5 mm/year and are experiencing an accretion deficit with respect to changing sea level.

The Salt Marsh Rapid Assessment Method, MarshRAM, was designed to address this need by documenting information characterizing salt marsh type, setting, ecological value, disturbance, integrity ...

The steady encroachment of saltwater is already changing the landscape, killing off saw grass and exposing the land to erosion. ... the team embedded a dozen Plexiglas tubes right into the marsh ...

In this study, we track the continuous, lateral encroachment of mangroves into two south-eastern Australian salt marshes over a period of 70 years and quantify corresponding changes in biomass and belowground C stores.

The salt marsh plays an important role in the ecosystem by providing habitat for animals, reducing floods, and filtering the water. As the tide goes out, oyster banks are exposed. Oysters are filter feeders and play an important role in cleaning the water that passes through the marsh. Cumberland Island National Seashore has 9,341 …

To document salt-marsh community composition over the last several thousand years and test the hypothesis that cordgrass has migrated landward in response to recent increases in the rate of SLR, we recovered a series sediment cores (7.5 cm diameter) by using a vibracore rig from across the modern cordgrass/high marsh …

In some temperate and subtropical coastal wetlands, warming winters are enabling mangrove forest encroachment into salt marsh, which is a major regime shift that has significant ecological and ...

Mangroves are encroaching into salt marshes throughout the world as a result of environmental change. Previous studies suggest mangroves trap sediment more efficiently than adjacent salt marshes, providing mangroves greater capacity to adapt to sea level rise; this may occur by displacing salt marshes.However, sediment transport in …

The objectives of this study were to (1) quantify mangrove encroachment into salt marsh habitat along the Atlantic coast of Florida, (2) document any shift in biomass C, or soil C, due to encroachment, and (3) identify the sources of C being accumulated in these systems. This study details the rapid encroachment of mangroves into salt …

The encroachment of woody mangrove shrubs and trees into herbaceous salt marshes may represent a substantial change in ecosystem structure, although resulting impacts on ecosystem functions and service provisions are largely unknown. In this review, we assess changes in ecosystem services associated with mangrove encroachment.

The migration of mangrove forests into salt marsh ecosystems is one such shift which could have important implications for global 'blue carbon' stocks. To date, attempts to quantify changes in ecosystem function are essentially constrained to climate-mediated pulses (30 years or less) of encroachment occurring at the thermal limits of ...

The geomorphic impact of mangrove encroachment on an Australian salt marsh. Investigation of sediment dynamics via high-resolution turbidity monitoring. Presence of mangroves does not reduce marsh sediment supply or accretion rates. Removal of mangroves likely a poor management strategy to protect salt marsh.

T. Z. Osborne & I. C. Feller. 1372 Accesses. 25 Citations. 33 Altmetric. 3 Mentions. Explore all metrics. Abstract. In North America, the dynamic ecotonal boundary between mangrove and salt marsh is currently fluctuating in response to freeze-free winters, which can cause rapid alterations in a number of wetland processes and attributes.

Separating the effects of anthropogenic changes in freshwater delivery from that of sea level rise on the rate of salt water encroachment in the low relief Southeast Saline Everglades is important for understanding how the Anthropocene Marine Transgression might be best managed. We use stratigraphic and paleoecologic methods …

Salt Marsh Plant Community Structure Influences Success of Avicennia germinans During Poleward Encroachment. August 2021; Wetlands 41(6)

1 Introduction. Salt marshes are valuable and unique landforms located at the interface between land and ocean. Salt marshes are still common along many shorelines, despite a 25% decline of the original coverage and a current 1–2% rate of loss per year (Crooks et al., 2011; Duarte et al., 2008; Secretariat of the Convention on …

We show a net salt marsh loss globally, equivalent to an area double the size of Singapore (719 km2), with a loss rate of 0.28% year−1 from 2000 to 2019. ... Mangrove encroachment is probably an ...

Increases in temperature are expected to facilitate encroachment of tropical mangrove forests into temperate salt marshes, yet the effects on ecosystem services are understudied. Our work was conducted along a mangrove expansion front in Louisiana (USA), an area where coastal wetlands are in rapid decline due to compounding factors, …

the ecological implications of mangrove forest encroachment into salt marsh. At all three locations, we quantified relation-ships between plant community composition and structure, soil and porewater physicochemical properties, tidal inunda-tion and climatic conditions. Materials and methods STUDY AREA

Marsh formation can be divided in three distinctive phases: preparation phase, encroachment phase, and adjustment phase. Sediment concentration, settling velocity, sea level rise, and tidal range each comparably affect restoration outcomes in different ways. The Unvegetated-Vegetated Ratio is related to sediment budget in marsh …

Woody encroachment is occurring worldwide, though there has been limited research within coastal systems, where mangrove (woody shrub/tree) stands are expanding into salt marsh areas. Because …

Salt marsh‐mangrove ecotones: using structural gradients to investigate the effects of woody plant encroachment on plant–soil …

Rapid shoreward encroachment of salt marsh cordgrass in response to accelerated sea-level rise. Jeffrey P. Donnelly*t and Mark D. Bertness*. Departments of *Geological Sciences and 'Ecology and Evolutionary Biology, Brown University, Providence, Rl 02912 Edited by Robert T. Paine, University of Washington, Seattle, WA, and approved October …

Mangrove encroachment onto marsh occurred with relative uniformity parallel to the coast until the completion of the Faka Union Canal in 1970. Mangroves encroached rapidly along CR 92 after 1940, as canals dug during construction of the road in 1938 likely expanded tidal range inland. ... Brackish and salt marsh zones had lower …

The distribution of New England salt marsh communities is intrinsically linked to the magnitude, frequency, and duration of tidal inundation. Cordgrass (Spartina alterniflora) exclusively inhabits the frequently flooded lower elevations, whereas a mosaic of marsh hay (Spartina patens), spike grass (Distichlis spicata), and black rush (Juncus …

Salt marshes play a key role in removing excess anthropogenic nitrogen (N) loads to nearshore marine ecosystems through sediment microbial processes such as denitrification. However, in the Gulf of Mexico, the loss of marsh vegetation because of human-driven disturbances such as sea level rise and oil spills can potentially reduce marsh capacity …

Increases in temperature are expected to facilitate encroachment of tropical mangrove forests into temperate salt marshes, yet the effects on ecosystem services are understudied. Our work was conducted along a mangrove expansion front in Louisiana (USA), an area where coastal wetlands are in rapid decline due to compounding factors, …

Surface elevation tables, feldspar marker horizons, and210Pb analysis of core profiles were implemented at four sites in Western Port Bay, Victoria, Australia, to provide information on the role of sedimentation, subsidence or compaction, and enhanced sea-level rise in contributing to salt marsh decline. Photogrammetric surveys indicate that the rate of salt …

It is theorized that mangrove encroachment may increase nutrient storage and improve storm protection, but cause declines in habitat availability for fauna requiring open vegetation structure as well as the recreational and cultural activities associated with this fauna. Salt marsh and mangrove have been recognized as being among the most …

Salt marsh-mangrove ecotones: Using structural gradients to investigate the effects of woody plant encroachment on plant-soil interactions and ecosystem carbon pools April 2016 Journal of Ecology ...

Collectively, these results suggest that mangrove encroachment may not modify the environmental factors driving decomposition, but alterations in foundation plant species may ultimately alter nutrient cycling within habitats through shifts in litter quality. ... Changes in δ15 N in salt marsh sediments in a long-term fertilization study. Mar ...