Vegetation Loss Decreases Salt Marsh Denitrification Capacity: Implications for Marsh Erosion

2017 ◽  
Vol 51 (15) ◽  
pp. 8245-8253 ◽  
Author(s):  
Sarra E. Hinshaw ◽  
Corianne Tatariw ◽  
Nikaela Flournoy ◽  
Alice Kleinhuizen ◽  
Caitlin Taylor ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Marsh Erosion ◽  
Vegetation Loss

Salt-marsh erosion associated with hurricane landfall in southern New England in the fifteenth and seventeenth centuries

Geology ◽  
2006 ◽  
Vol 34 (10) ◽  
pp. 829 ◽  
Author(s):  
Orson van de Plassche ◽  
Gilles Erkens ◽  
Frank van Vliet ◽  
Joost Brandsma ◽  
Klaas van der Borg ◽  
...  
Keyword(s):  
Salt Marsh ◽  
New England ◽  
Southern New England ◽  
Marsh Erosion ◽  
Salt Marsh Erosion

scholarly journals Salt marsh erosion rates and boundary features in a shallow Bay

2016 ◽  
Vol 121 (10) ◽  
pp. 1861-1875 ◽  
Author(s):  
Nicoletta Leonardi ◽  
Zafer Defne ◽  
Neil K. Ganju ◽  
Sergio Fagherazzi
Keyword(s):  
Salt Marsh ◽  
Erosion Rates ◽  
Marsh Erosion ◽  
Salt Marsh Erosion ◽  
Shallow Bay

scholarly journals A linear relationship between wave power and erosion determines salt-marsh resilience to violent storms and hurricanes

2015 ◽  
Vol 113 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Nicoletta Leonardi ◽  
Neil K. Ganju ◽  
Sergio Fagherazzi
Keyword(s):  
Salt Marsh ◽  
Wave Energy ◽  
Salt Marshes ◽  
Wind Waves ◽  
The United States ◽  
Intrinsic Resistance ◽  
Erosion Rates ◽  
Marsh Erosion ◽  
Salt Marsh Erosion ◽  
General Response

Salt marsh losses have been documented worldwide because of land use change, wave erosion, and sea-level rise. It is still unclear how resistant salt marshes are to extreme storms and whether they can survive multiple events without collapsing. Based on a large dataset of salt marsh lateral erosion rates collected around the world, here, we determine the general response of salt marsh boundaries to wave action under normal and extreme weather conditions. As wave energy increases, salt marsh response to wind waves remains linear, and there is not a critical threshold in wave energy above which salt marsh erosion drastically accelerates. We apply our general formulation for salt marsh erosion to historical wave climates at eight salt marsh locations affected by hurricanes in the United States. Based on the analysis of two decades of data, we find that violent storms and hurricanes contribute less than 1% to long-term salt marsh erosion rates. In contrast, moderate storms with a return period of 2.5 mo are those causing the most salt marsh deterioration. Therefore, salt marshes seem more susceptible to variations in mean wave energy rather than changes in the extremes. The intrinsic resistance of salt marshes to violent storms and their predictable erosion rates during moderate events should be taken into account by coastal managers in restoration projects and risk management plans.

Salt Marsh Erosion in Essex

Nature ◽  
1965 ◽  
Vol 206 (4984) ◽  
pp. 606-607 ◽  
Author(s):  
J. T. GREENSMITH ◽  
E. V. TUCKER
Keyword(s):  
Salt Marsh ◽  
Marsh Erosion ◽  
Salt Marsh Erosion

scholarly journals High Times and Dry Times In a Salt Marsh: Budgeting For Supplemental Freshwater Needs at the Big Boggy National Wildlife Refuge, USA

2022 ◽  
Author(s):  
Matthew Madewell ◽  
Rusty Feagin ◽  
Thomas Huff ◽  
Bill Balboa
Keyword(s):  
Salt Marsh ◽  
Salt Marshes ◽  
Freshwater Input ◽  
National Wildlife Refuge ◽  
Management Options ◽  
Wildlife Refuge ◽  
Management Actions ◽  
Seasonal Droughts ◽  
Freshwater Inflows ◽  
Vegetation Loss

Abstract Salt marshes can be vulnerable to reduced freshwater input. Reduced freshwater inflows, particularly during a hot or dry summer season, can be catastrophic for vegetation productivity, organic accretion and inorganic sedimentation, and the ability of a marsh to maintain a sustainable elevation facing relative sea level rise (RSLR). Unfortunately, it is challenging for scientists to obtain inflow records for ungauged watersheds and link them with historical trends of salt marsh loss. We sought to address this challenge in Big Boggy National Wildlife Refuge (NWR), a small watershed in East Matagorda Bay, Texas. Our objective was to link the quantity of freshwater inflow with salt marsh sustainability and recommend management actions for the NWR. We first explored land cover trends and found that this watershed lost more than one-third of its low marsh since 1953. We then measured the streamflow into and out of the watershed, created a water budget, and modeled historical and future inflows from 1953 to 2100. Freshwater inflows have been increasing on average since 1953, but a combination of RSLR, sediment starvation, and punctuated seasonal droughts are likely responsible for the loss of salt marsh. We also estimated supplemental water needs during potential droughts out to 2100. We conclude that managers cannot fundamentally alter the accretion versus RSLR balance in this basin except by modifying freshwater input. Thus, during droughts, they should focus on providing these inputs and avoiding vegetation loss. Our work points to both water purchases and land management options that can achieve this goal.

Causes of Salt Marsh Erosion in Galveston Bay, Texas

2009 ◽  
Vol 252 ◽  
pp. 265-272 ◽  
Author(s):  
Thomas M. Ravens ◽  
Robert C. Thomas ◽  
Kimberly A. Roberts ◽  
Peter H. Santschi
Keyword(s):  
Salt Marsh ◽  
Galveston Bay ◽  
Marsh Erosion ◽  
Salt Marsh Erosion
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