scholarly journals Salt Marsh Loss Affects Tides and the Sediment Budget in Shallow Bays

2018 ◽  
Vol 123 (10) ◽  
pp. 2647-2662 ◽  
Author(s):  
Carmine Donatelli ◽  
Neil Kamal Ganju ◽  
Xiaohe Zhang ◽  
Sergio Fagherazzi ◽  
Nicoletta Leonardi
Keyword(s):  
Salt Marsh ◽  
Sediment Budget ◽  
Marsh Loss

Impact of salt marsh and seagrass beds on the sediemnt buget and resilience of coatsal areas

2020 ◽  
Author(s):  
Nicoletta Leonardi ◽  
Carmine Donatelli ◽  
Xiahoe Zhang ◽  
Neil Ganju ◽  
Sergio Fagherazzi
Keyword(s):  
Salt Marsh ◽  
Water Resources ◽  
Salt Marshes ◽  
Numerical Models ◽  
Sediment Budget ◽  
Coastal Protection ◽  
Seagrass Beds ◽  
Geophysical Research ◽  
Coastal System ◽  
Depositional Patterns

<p>Salt marshes and seagrass beds can offer sustainable coastal protection solutions and several ecosystem co-benefits. The delicate balance regulating salt marsh stability depends on several factors including the sediment added to and removed from the coastal system (<em>Donatelli et al., 2018, 2019; Zhang et al., 2019</em>).  Despite the importance of these sediment budget dynamics, many feedbacks between salt marsh presence and sediment availability are still unclear. Here, we use numerical models to simulate changes in depositional patterns of six estuaries along the U.S. coastline to investigate how salt marsh and seagrass beds removal and restoration can alter the sediment budget and resilience of coastal environments. </p><p><em>Donatelli, C., Ganju, N.K., Kalra, T.S., Fagherazzi, S. and Leonardi, N., 2019. Changes in hydrodynamics and wave energy as a result of seagrass decline along the shoreline of a microtidal back-barrier estuary. Advances in Water Resources, 128, pp.183-192.</em></p><p><em>Zhang, X., Leonardi, N., Donatelli, C. and Fagherazzi, S., 2019. Fate of cohesive sediments in a marsh-dominated estuary. Advances in water resources, 125, pp.32-40.</em></p><p><em>Donatelli, C., Ganju, N.K., Fagherazzi, S. and Leonardi, N., 2018. Seagrass impact on sediment exchange between tidal flats and salt marsh, and the sediment budget of shallow bays. Geophysical Research Letters, 45(10), pp.4933-4943.</em></p>

scholarly journals The Contribution of Mangrove Expansion to Salt Marsh Loss on the Texas Gulf Coast

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0125404 ◽  
Author(s):  
Anna R. Armitage ◽  
Wesley E. Highfield ◽  
Samuel D. Brody ◽  
Patrick Louchouarn
Keyword(s):  
Salt Marsh ◽  
Gulf Coast ◽  
Marsh Loss ◽  
Texas Gulf Coast ◽  
Mangrove Expansion

Salt marsh resilience to sea-level rise and increased storm intensity

2021 ◽  
Author(s):  
Natascia Pannozzo ◽  
Nicoletta Leonardi ◽  
Iacopo Carnacina ◽  
Rachel Smedley
Keyword(s):  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Storm Surge ◽  
Salt Marshes ◽  
Sediment Budget ◽  
Geophysical Research ◽  
Storm Intensity ◽  
Combined Impact ◽  
And Sea Level

<p>Salt marshes are widely recognised as ecosystems with high economic and environmental value. However, it is still unclear how salt marshes will respond to the combined impact of future sea-level rise and possible increases in storm intensity (Schuerch et al. 2013). This study investigates marsh resilience under the combined impact of various storm surge and sea-level scenarios by using a sediment budget approach. The current paradigm is that a positive sediment budget supports the accretion of salt marshes and, therefore, its survival, while a negative sediment budget causes marsh degradation (Ganju et al. 2015). The Ribble Estuary, North-West England, was used as test case, and the hydrodynamic model Delft3D was used to simulate the response of the salt marsh system to the above scenarios. We conclude that the resilience of salt marshes and estuarine systems is enhanced under the effect of storm surges, as they promote flood dominance and trigger a net import of sediment.  Conversely, sea-level rise threatens marsh stability, by promoting ebb dominance and triggering a net export of sediment. Ultimately, when storm surge and sea-level scenarios are combined, results show that storms with the highest intensities have the potential to counteract the negative impact of sea-level rise by masking its effects on the sediment budget.</p><p><strong>Acknowledgements</strong></p><p>We acknowledge the support of the School of Environmental Sciences, University of Liverpool.</p><p><strong>References</strong></p><p>Ganju, N.K., Kirwan, M.L., Dickhudt, P.J., Guntenspergen, G.R., Cahoon, D.R. and Kroeger, K.D. 2015. “Sediment transport-based metrics of wetland stability”. Geophysical Research Letters, 42(19), 7992-8000.</p><p>Schuerch, M., Vafeidis, A., Slawig, T. and Temmerman, S. 2013. “Modeling the influence of changing storm patterns on the ability of a salt marsh to keep pace with sea level rise”. Journal of Geophysical Research-Earth Surface, 118(1),<strong> </strong>84-96.</p>

Coastal eutrophication as a driver of salt marsh loss

Nature ◽  
2012 ◽  
Vol 490 (7420) ◽  
pp. 388-392 ◽  
Author(s):  
Linda A. Deegan ◽  
David Samuel Johnson ◽  
R. Scott Warren ◽  
Bruce J. Peterson ◽  
John W. Fleeger ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Coastal Eutrophication ◽  
Marsh Loss

scholarly journals Wetland Loss Patterns and Inundation-Productivity Relationships Prognosticate Widespread Salt Marsh Loss for Southern New England

2016 ◽  
Vol 40 (3) ◽  
pp. 662-681 ◽  
Author(s):  
Elizabeth Burke Watson ◽  
Cathleen Wigand ◽  
Earl W. Davey ◽  
Holly M. Andrews ◽  
Joseph Bishop ◽  
...  
Keyword(s):  
Salt Marsh ◽  
New England ◽  
Wetland Loss ◽  
Marsh Loss ◽  
Southern New England

scholarly journals Burrowing crabs and physical factors hasten marsh recovery at panne edges

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0249330
Author(s):  
Kathryn Beheshti ◽  
Charlie Endris ◽  
Peter Goodwin ◽  
Annabelle Pavlak ◽  
Kerstin Wasson
Keyword(s):  
Salt Marsh ◽  
Global Climate ◽  
Field Investigation ◽  
Physical Factors ◽  
Key Factors ◽  
Negative Effects ◽  
Central California ◽  
Marsh Loss ◽  
Negative Effect ◽  
Positive Effect

Salt marsh loss is projected to increase as sea-level rise accelerates with global climate change. Salt marsh loss occurs along both lateral creek and channel edges and in the marsh interior, when pannes expand and coalesce. Often, edge loss is attributed to erosive processes whereas dieback in the marsh interior is linked to excessive inundation or deposition of wrack, but remains poorly understood. We conducted a two-year field investigation in a central California estuary to identify key factors associated with panne contraction or expansion. Our study explored how an abundant burrowing crab, shown to have strong negative effects on marsh biomass near creek edges, affects panne dynamics. We also explored which physical panne attributes best predicted their dynamics. To our knowledge, ours is the first study of panne dynamics in a California marsh, despite how ubiquitous pannes are as a feature of marshes in the region and how often extensive marsh dieback occurs via panne expansion. Overall, we found that pannes contracted during the study period, but with variable rates of marsh recovery across pannes. Our model incorporating both physical and biological factors explained 86% of the variation in panne contraction. The model revealed a positive effect of crab activity, sediment accretion, and a composite of depth and elevation on panne contraction, and a negative effect of panne size and distance to nearest panne. The positive crab effects detected in pannes contrast with negative effects we detected near creek edges in a previous study, highlighting the context-dependence of top-down and bioturbation effects in marshes. As global change continues and the magnitude and frequency of disturbances increases, understanding the dynamics of marsh loss in the marsh interior as well as creek banks will be critical for the management of these coastal habitats.

Hydrological Barrier as a Cause of Salt Marsh Loss

2017 ◽  
Vol 77 ◽  
pp. 88-96 ◽  
Author(s):  
Thomas P. Huff ◽  
Rusty A. Feagin
Keyword(s):  
Salt Marsh ◽  
Marsh Loss

scholarly journals Seagrass Impact on Sediment Exchange Between Tidal Flats and Salt Marsh, and The Sediment Budget of Shallow Bays

2018 ◽  
Vol 45 (10) ◽  
pp. 4933-4943 ◽  
Author(s):  
Carmine Donatelli ◽  
Neil Kamal Ganju ◽  
Sergio Fagherazzi ◽  
Nicoletta Leonardi
Keyword(s):  
Salt Marsh ◽  
Tidal Flats ◽  
Sediment Budget

Assessing the relation between the distribution of salt-marsh communities and the sediment budget of the North Norfolk coast

2002 ◽  
Vol 8 (1) ◽  
pp. 55 ◽  
Author(s):  
N.J. Brown ◽  
R. Cox ◽  
R. Pakeman ◽  
A.G. Thomson ◽  
R.A. Wadsworth ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Sediment Budget ◽  
The North
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