Long-term sediment accretion and nutrient deposition in a tidal marsh of the Delaware Bay

2020 ◽  
Vol 167 (1) ◽  
pp. 87
Author(s):  
David J. Velinsky ◽  
Bhanu Paudel ◽  
Christopher K. Sommerfield
Keyword(s):  
Tidal Marsh ◽  
Delaware Bay ◽  
Sediment Accretion ◽  
Nutrient Deposition

scholarly journals Phosphorus supply affects long-term carbon accumulation in mid-latitude ombrotrophic peatlands

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Daniel N. Schillereff ◽  
Richard C. Chiverrell ◽  
Jenny K. Sjöström ◽  
Malin E. Kylander ◽  
John F. Boyle ◽  
...  
Keyword(s):  
Carbon Sink ◽  
Threshold Effect ◽  
Carbon Accumulation ◽  
Ecosystem Productivity ◽  
Microbial Decomposition ◽  
Nutrient Deposition ◽  
Carbon Burial ◽  
Carbon Store ◽  
Post Industrial

AbstractOmbrotrophic peatlands are a globally important carbon store and depend on atmospheric nutrient deposition to balance ecosystem productivity and microbial decomposition. Human activities have increased atmospheric nutrient fluxes, but the impacts of variability in phosphorus supply on carbon sequestration in ombrotrophic peatlands are unclear. Here, we synthesise phosphorus, nitrogen and carbon stoichiometric data in the surface and deeper layers of mid-latitude Sphagnum-dominated peatlands across Europe, North America and Chile. We find that long-term elevated phosphorus deposition and accumulation strongly correlate with increased organic matter decomposition and lower carbon accumulation in the catotelm. This contrasts with literature that finds short-term increases in phosphorus supply stimulates rapid carbon accumulation, suggesting phosphorus deposition imposes a threshold effect on net ecosystem productivity and carbon burial. We suggest phosphorus supply is an important, but overlooked, factor governing long-term carbon storage in ombrotrophic peatlands, raising the prospect that post-industrial phosphorus deposition may degrade this carbon sink.

Long-Term Sediment Accretion in Bottomland Hardwoods Following Timber Harvest Disturbances in the Mobile-Tensaw River Delta, Alabama, USA

Wetlands ◽  
2012 ◽  
Vol 32 (5) ◽  
pp. 871-884 ◽  
Author(s):  
W. M. Aust ◽  
S. E. McKee ◽  
J. R. Seiler ◽  
B. D. Strahm ◽  
E. B. Schilling
Keyword(s):  
Timber Harvest ◽  
River Delta ◽  
Bottomland Hardwoods ◽  
Sediment Accretion

Long-term Trends in Oyster Population Dynamics in Delaware Bay: Regime Shifts and Response to Disease

2008 ◽  
Vol 27 (4) ◽  
pp. 729-755 ◽  
Author(s):  
Eric N. Powell ◽  
Kathryn A. Ashton-Alcox ◽  
John N. Kraeuter ◽  
Susan E. Ford ◽  
David Bushek
Keyword(s):  
Population Dynamics ◽  
Delaware Bay ◽  
Regime Shifts ◽  
Oyster Population ◽  
Long Term Trends

scholarly journals The Potential Resiliency of a Created Tidal Marsh to Sea Level Rise

2019 ◽  
Vol 62 (6) ◽  
pp. 1567-1577
Author(s):  
Brock J. W. Kamrath ◽  
Michael R. Burchell ◽  
Nicole Cormier ◽  
Ken W. Krauss ◽  
Darren J. Johnson
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Tidal Marsh ◽  
Linear Trend ◽  
Elevation Gradient ◽  
Surface Elevation ◽  
High Marsh ◽  
Reference Marsh ◽  
Elevation Changes

Abstract. The purpose of this study was to determine the elevation dynamics of a created tidal marsh on the North Carolina coast. Deep rod surface elevation tables (RSET) and feldspar marker horizons (MH) were installed in plots to measure net surface elevation changes and to quantify contributing processes. Twelve total plots were placed on four elevation gradient transects (three transects within the created marsh and one within a reference marsh), with three plots along each transect. Elevation gradient transects included a low marsh plot dominated by , a middle marsh plot dominated by , and a high marsh plot dominated by . RSET and MH were measured in December 2012, January 2014, April 2017, and March 2018. Elevation change ranged from 1.0 to 4.0 mm year-1 within the created marsh and from -0.4 to 2.0 mm year-1 within the reference marsh. When compared to the long-term linear trend in local relative sea level rise (RSLR) of 3.10 ±0.35 mm year-1, the middle marsh plots within the created marsh trended toward survival, with an observed elevation increase of 3.1 ±0.2 mm year-1. Alternatively, the low and high marsh plots within the created marsh trended toward submergence, with observed elevation increases of 2.1 ±0.2 and 1.3 ±0.2 mm year-1, respectively. These results indicate that a created marsh can display elevation dynamics similar to a natural marsh and can be resilient to current rates of RSLR if constructed with a high elevation capital. Surface elevation changes were observed over a short time period and in a relatively young marsh, so it is uncertain if these trends will continue or how the long-term relation with RSLR will develop. While this study provided initial data on the ability of created tidal marshes to respond to observed sea level rise, subsequent observations are needed to evaluate the long-term elevation dynamics. Keywords: Resiliency, Sea level rise, Surface elevation tables, Tidal marsh, Vertical accretion.

scholarly journals Climate Change Implications for Tidal Marshes and Food Web Linkages to Estuarine and Coastal Nekton

2021 ◽  
Author(s):  
Denise D. Colombano ◽  
Steven Y. Litvin ◽  
Shelby L. Ziegler ◽  
Scott B. Alford ◽  
Ronald Baker ◽  
...  
Keyword(s):  
Climate Change ◽  
Food Web ◽  
Tidal Marsh ◽  
Tidal Marshes ◽  
Future Climate Change ◽  
Ecological Processes ◽  
Sea Levels ◽  
Climate Change Effects ◽  
Multiple Stressor

AbstractClimate change is altering naturally fluctuating environmental conditions in coastal and estuarine ecosystems across the globe. Departures from long-term averages and ranges of environmental variables are increasingly being observed as directional changes [e.g., rising sea levels, sea surface temperatures (SST)] and less predictable periodic cycles (e.g., Atlantic or Pacific decadal oscillations) and extremes (e.g., coastal flooding, marine heatwaves). Quantifying the short- and long-term impacts of climate change on tidal marsh seascape structure and function for nekton is a critical step toward fisheries conservation and management. The multiple stressor framework provides a promising approach for advancing integrative, cross-disciplinary research on tidal marshes and food web dynamics. It can be used to quantify climate change effects on and interactions between coastal oceans (e.g., SST, ocean currents, waves) and watersheds (e.g., precipitation, river flows), tidal marsh geomorphology (e.g., vegetation structure, elevation capital, sedimentation), and estuarine and coastal nekton (e.g., species distributions, life history adaptations, predator-prey dynamics). However, disentangling the cumulative impacts of multiple interacting stressors on tidal marshes, whether the effects are additive, synergistic, or antagonistic, and the time scales at which they occur, poses a significant research challenge. This perspective highlights the key physical and ecological processes affecting tidal marshes, with an emphasis on the trophic linkages between marsh production and estuarine and coastal nekton, recommended for consideration in future climate change studies. Such studies are urgently needed to understand climate change effects on tidal marshes now and into the future.

Measuring sediment accretion in early tidal marsh restoration

2010 ◽  
Vol 18 (3) ◽  
pp. 297-305 ◽  
Author(s):  
John Y. Takekawa ◽  
Isa Woo ◽  
Nicole D. Athearn ◽  
Scott Demers ◽  
Rachel J. Gardiner ◽  
...  
Keyword(s):  
Tidal Marsh ◽  
Sediment Accretion ◽  
Marsh Restoration ◽  
Tidal Marsh Restoration

scholarly journals Erratum to: Measuring sediment accretion in early tidal marsh restoration

2010 ◽  
Vol 18 (6) ◽  
pp. 755-755 ◽  
Author(s):  
John Y. Takekawa ◽  
Isa Woo ◽  
Nicole D. Athearn ◽  
Scott Demers ◽  
Rachel J. Gardiner ◽  
...  
Keyword(s):  
Tidal Marsh ◽  
Sediment Accretion ◽  
Marsh Restoration ◽  
Tidal Marsh Restoration

Mercury concentrations in tidal marsh sparrows and their use as bioindicators in Delaware Bay, USA

2010 ◽  
Vol 171 (1-4) ◽  
pp. 671-679 ◽  
Author(s):  
Sarah E. Warner ◽  
W. Gregory Shriver ◽  
Margaret A. Pepper ◽  
Robert J. Taylor
Keyword(s):  
Tidal Marsh ◽  
Delaware Bay

scholarly journals Erratum to: Mercury concentrations in tidal marsh sparrows and their use as bioindicators in Delaware Bay, USA

2010 ◽  
Vol 171 (1-4) ◽  
pp. 691-691
Author(s):  
Sarah E. Warner ◽  
W. Gregory Shriver ◽  
Margaret A. Pepper ◽  
Robert J. Taylor
Keyword(s):  
Tidal Marsh ◽  
Delaware Bay

scholarly journals Long-term organic carbon sequestration in tidal marsh sediments is dominated by old-aged allochthonous inputs in a macrotidal estuary

2018 ◽  
Vol 24 (6) ◽  
pp. 2498-2512 ◽  
Author(s):  
Marijn Van de Broek ◽  
Caroline Vandendriessche ◽  
Dries Poppelmonde ◽  
Roel Merckx ◽  
Stijn Temmerman ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Tidal Marsh ◽  
Allochthonous Inputs ◽  
Macrotidal Estuary ◽  
Organic Carbon Sequestration ◽  
Marsh Sediments
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