Abstract
Thin-layer sediment placement (TLP) is a promising management tool for enhancing tidal marsh resilience to rising seas. We conducted a 3-year experiment at eight US National Estuarine Research Reserves using a standardized implementation protocol and subsequent monitoring to evaluate effects of sediment placement on vegetation in low and high marsh, and compared this to control and reference plots. Sediments added to experimental plots were sourced from nearby quarries, were sandier than ambient marsh soils, and had more crab burrowing, but proved effective, suggesting that terrestrial sources can be used for tidal marsh restoration. We found strong differences among sites but detected general trends across the eight contrasting systems. Colonization by marsh plants was generally rapid following sediment addition, such that TLP plot cover was similar to control plots. While we found that 14-cm TLP plots were initially colonized more slowly than 7-cm plots, this difference largely disappeared after three years. In the face of accelerated sea-level rise, we thus recommend adding thicker sediment layers. Despite rapid revegetation, TLP plots did not approximate vegetation characteristics of higher elevation reference plots. Thus, while managers can expect fairly fast revegetation at TLP sites, the ultimate goal of achieving reference marsh conditions may be achieved slowly if at all. Vegetation recovered rapidly in both high and low marsh; thus, TLP can serve as a climate adaptation strategy across the marsh landscape. Our study illustrates the value of conducting experiments across disparate geographies and provides restoration practitioners with guidance for conducting future TLP projects.
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig1_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig2_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig3_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig4_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig5_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig6_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12237-022-01161-y/MediaObjects/12237_2022_1161_Fig7_HTML.png)
Similar content being viewed by others
References
Allison, S.K. 1996. Recruitment and establishment of salt marsh plants following disturbance by flooding. American Midland Naturalist 136: 232–247.
Angelini, C., S.G. van Montfrans, M.J. Hensel, Q. He, and B.R. Silliman. 2018. The importance of an underestimated grazer under climate change: How crab density, consumer competition, and physical stress affect salt marsh resilience. Oecologia 187: 205–217.
Beheshti, K., C. Endris, P. Goodwin, A. Pavlak, and K. Wasson. 2022. Burrowing crabs and physical factors hasten marsh recovery at panne edges. PLoS ONE 17: e0249330.
Berkowitz, J.F., and C.M. VanZomeren. 2020. Evaluation of iron sulfide soil formation following coastal marsh restoration - observations from three case studies. U.S. Army Corps of Engineers Final Report ERDC/EL TR-20–1.
Brophy, L.S., C.M. Greene, V.C. Hare, B. Holycross, A. Lanier, W.N. Heady, K. O’Connor, H. Imaki, T. Haddad, and R. Dana. 2019. Insights into estuary habitat loss in the western United States using a new method for map** maximum extent of tidal wetlands. PLoS ONE 14 (8): e0218558. https://doi.org/10.1371/journal.pone.0218558.
Butzeck, C.B., A. Eschenbach, A. Gröngröft, K. Hansen, S. Nolte, and K. Jensen. 2015. Sediment deposition and accretion rates in tidal marshes are highly variable along estuarine salinity and flooding gradients. Estuaries and Coasts 38: 434–450.
Cahoon, D.R., J.C. Lynch, C.T. Roman, J.P. Schmit, and D.E. Skidds. 2019. Evaluating the relationship among wetland vertical development, elevation capital, sea-level rise, and tidal marsh sustainability. Estuaries and Coasts 42 (1): 1–15.
Cornu, C.E., and S. Sadro. 2002. Physical and functional responses to experimental marsh surface elevation manipulation in Coos Bay’s South Slough. Restoration Ecology 10 (3): 474–486.
Coverdale, T.C., N.C. Herrmann, A.H. Altieri, and M.D. Bertness. 2013. Latent impacts: The role of historical human activity in coastal habitat loss. Frontiers in Ecology and the Environment 11 (2): 69–74.
Croft, A.L., L.A. Leonard, T.D. Alphin, L.B. Cahoon, and M.H. Posey. 2006. The effects of thin layer sand renourishment on tidal marsh processes: Masonboro Island. North Carolina. Estuaries and Coasts 29 (5): 737–750.
DeLaune, R.D., S.R. Pezeshki, J.H. Pardue, J.H. Whitcomb, and W.H. Patrick Jr. 1990. Some influences of sediment addition to a deteriorating salt marsh in the Mississippi River deltaic plain: A pilot study. Journal of Coastal Research 6 (1): 181–188.
Doney, S.C., M. Ruckelshaus, J.E. Duffy, J.P. Barry, F. Chan, C.A. English, H.M. Galindo, J.M. Grebmeier, A.B. Hollowed, N. Knowlton, and J. Polovina. 2011. Climate change impacts on marine ecosystems. Annual Review of Marine Science 4: 11–37.
Drake, K., H. Halifax, S.C. Adamowicz, and C. Craft. 2015. Carbon sequestration in tidal salt marshes of the Northeast United States. Environmental Management 56 (4): 998–1008.
Estes, L., P.R. Elsen, T. Treuer, L. Ahmed, K. Caylor, J. Chang, J.J. Choi, and E.C. Ellis. 2018. The spatial and temporal domains of modern ecology. Nature Ecology & Evolution 2 (5): 819–826.
Fang, Y., B. Singh, and B.P. Singh. 2015. Effect of temperature on biochar priming effects and its stability in soils. Soil Biology and Biochemistry 80: 136–145.
Fraser, L.H., H.A. Henry, C.N. Carlyle, S.R. White, C. Beierkuhnlein, J.F. Cahill Jr., B.B. Casper, E. Cleland, S.L. Collins, J.S. Dukes, and A.K. Knapp. 2013. Coordinated distributed experiments: An emerging tool for testing global hypotheses in ecology and environmental science. Frontiers in Ecology and the Environment 11 (3): 147–155.
Ganju, N.K. 2019. Marshes are the new beaches: Integrating sediment transport into restoration planning. Estuaries and Coasts 42 (4): 917–926.
Gedan, K.B., B.R. Silliman, and M.D. Bertness. 2009. Centuries of human-driven change in salt marsh ecosystems. Annual Review of Marine Science 1: 117–141.
Gedan, K.B., M.L. Kirwan, E. Wolanski, E.B. Barbier, and B.R. Silliman. 2011. The present and future role of coastal wetland vegetation in protecting shorelines: Answering recent challenges to the paradigm. Climatic Change 106 (1): 7–29.
Gellie, N.J., M.F. Breed, P.E. Mortimer, R.D. Harrison, J. Xu, and A.J. Lowe. 2018. Networked and embedded scientific experiments will improve restoration outcomes. Frontiers in Ecology and the Environment 16 (5): 288–294.
Gunderson, L.H. 2000. Ecological resilience-in theory and application. Annual Review of Ecology and Systematics 31: 425–439.
He, Q., and B.R. Silliman. 2016. Consumer control as a common driver of coastal vegetation worldwide. Ecological Monographs 86 (3): 278–294.
Holling, C.S. 1973. Resilience and stability of ecological systems. Annual Review of Ecology and Systematics 4: 1–23.
Karl, T.R., and K.E. Trenberth. 2003. Modern global climate change. Science 302 (5651): 1719–1723.
Kennish, M.J. 2001. Coastal salt marsh systems in the US: A review of anthropogenic impacts. Journal of Coastal Research 17 (3): 731–748.
Kent, M., and P. Coker. 1992. Vegetation Description and Analysis: A Practical Approach. Chichester, England: John Wiley and Sons.
Kirwan, M.L., and J.P. Megonigal. 2013. Tidal wetland stability in the face of human impacts and sea-level rise. Nature 504 (7478): 53–60.
Kirwan, M.L., S. Temmerman, E.E. Skeehan, G.R. Guntenspergen, and S. Fagherazzi. 2016. Overestimation of marsh vulnerability to sea level rise. Nature Climate Change 6 (3): 253–260.
Koo, B.J., S.H. Kim, and J.H. Hyun. 2019. Feeding behavior of the ocypodid crab Macrophthalmus japonicus and its effects on oxygen-penetration depth and organic-matter removal in intertidal sediments. Estuarine, Coastal and Shelf Science 228: 106366.
Krause, J.R., E.B. Watson, C. Wigand, and N. Maher. 2019. Are tidal salt marshes exposed to nutrient pollution more vulnerable to sea level rise? Wetlands 40: 1–10.
La Peyre, M.K., B. Gossman, and B.P. Piazza. 2009. Short-and long-term response of deteriorating brackish marshes and open-water ponds to sediment enhancement by thin-layer dredge disposal. Estuaries and Coasts 32 (2): 390–402.
Liang, B., J. Lehmann, D. Solomon, J. Kinyangi, J. Grossman, B. O’Neill, J.O. Skjemstad, J. Thies, F.J. Luizao, J. Petersen, and E.G. Neves. 2006. Black carbon increases cation exchange capacity in soils. Soil Science Society of America Journal 70 (5): 1719–1730.
Liu, Z., S. Fagherazzi, X. Ma, C. **e, J. Li, and B. Cui. 2020. Consumer control and abiotic stresses constrain coastal saltmarsh restoration. Journal of Environmental Management 274: 111110.
Luo, X., L. Wang, G. Liu, X. Wang, Z. Wang, and H. Zheng. 2016. Effects of biochar on carbon mineralization of coastal wetland soils in the Yellow River Delta, China. Ecological Engineering 94: 329–336.
Mariotti, G. 2016. Revisiting salt marsh resilience to sea level rise: Are ponds responsible for permanent land loss? Journal of Geophysical Research: Earth Surface 121 (7): 1391–1407.
Mcleod, E., G.L. Chmura, S. Bouillon, R. Salm, M. Björk, C.M. Duarte, C.E. Lovelock, W.H. Schlesinger, and B.R. Silliman. 2011. A blueprint for blue carbon: Toward an improved understanding of the role of vegetated coastal habitats in sequestering CO2. Frontiers in Ecology and the Environment 9 (10): 552–560.
Mendelssohn, I.A., and N.L. Kuhn. 2003. Sediment subsidy: Effects on soil–plant responses in a rapidly submerging coastal salt marsh. Ecological Engineering 21 (2–3): 115–128.
Molino, G.D., Z. Defne, A.L. Aretxabaleta, N.K. Ganju, and J.A. Carr. 2021. Quantifying slopes as a driver of forest to marsh conversion using geospatial techniques: Application to Chesapeake Bay coastal-plain. United States. Frontiers in Environmental Science 9: 616319.
Moore, G.E., D.M. Burdick, C.R. Peter, A. Leonard-Duarte, and M. Dionne. 2009. Regional assessment of tidal marsh restoration in New England using the Restoration Performance Index. Final report submitted to NOAA Restoration Center.
Moore, G.E., D.M. Burdick, M.R. Routhier, A.B. Novak, and A.R. Payne. 2021. Effects of a large-scale, natural sediment deposition event on plant cover in a Massachusetts salt marsh. PLoS ONE 16 (1): e0245564.
Munang, R., I. Thiaw, K. Alverson, M. Mumba, J. Liu, and M. Rivington. 2013. Climate change and ecosystem-based adaptation: A new pragmatic approach to buffering climate change impacts. Current Opinion in Environmental Sustainability 5 (1): 67–71.
Nelson, J., K. Wasson, M. Fountain, and J. West. 2020. Consensus statement on thin-layer sediment placement in tidal marsh ecosystems. In Guidance for thin-layer sediment placement as a strategy to enhance tidal marsh resilience to sea-level rise, K. Raposa, K. Wasson, J. Nelson, M. Fountain, J. West, C. Endris, and A. Woolfolk. Published in collaboration with the National Estuarine Research Reserve System Science Collaborative. https://nerrssciencecollaborative.org/project/Raposa17.
Nyman, J.A., R.J. Walters, R.D. Delaune, and W.H. Patrick Jr. 2006. Marsh vertical accretion via vegetative growth. Estuarine, Coastal and Shelf Science 69 (3–4): 370–380.
Osland, M.J., B. Chivoiu, N.M. Enwright, K.M. Thorne, G.R. Guntenspergen, J.B. Grace, L.L. Dale, W. Brooks, N. Herold, J.W. Day, and F.H. Sklar. 2022. Migration and transformation of coastal wetlands in response to rising seas. Science Advances 8(26): eabo5174.
Pan, F., K. **ao, Z. Guo, and H. Li. 2022. Effects of fiddler crab bioturbation on the geochemical migration and bioavailability of heavy metals in coastal wetlands. Journal of Hazardous Material 437: 129380.
Payne, A.R., D.M. Burdick, G.E. Moore, and C. Wigand. 2021. Short-term effects of thin-layer sand placement on salt marsh grasses: A marsh organ field experiment. Journal of Coastal Research 37 (4): 771–778.
Peng, D., E.M. Hill, A.J. Melzner, and A.D. Switzer. 2019. Tide gauge records show that the 18.61-year nodal tidal cycle can change high water levels by up to 30 cm. Journal of Geophysical Research: Oceans 124: 736–749.
Raposa, K.B., S. Lerberg, C. Cornu, J. Fear, N. Garfield, C. Peter, R.L.J. Weber, G. Moore, D. Burdick, and M. Dionne. 2017. Evaluating tidal wetland restoration performance using National Estuarine Research Reserve System reference sites and the restoration performance index (RPI). Estuaries and Coasts 41 (1): 1–16.
Raposa, K.B., K. Wasson, and C. Endris. 2020. Recommended monitoring for thin-layer sediment placement projects in tidal marshes. In Guidance for thin-layer sediment placement as a strategy to enhance tidal marsh resilience to sea-level rise, K. Raposa, K. Wasson, J. Nelson, M. Fountain, J. West, C. Endris, and A. Woolfolk. Published in collaboration with the National Estuarine Research Reserve System Science Collaborative. https://nerrssciencecollaborative.org/project/Raposa17.
Raposa, K.B., M. Bradley, C. Chaffee, N. Ernst, W. Ferguson, T.E. Kutcher, R.A. McKinney, K.M. Miller, S. Rasmussen, E. Tymkiw, and C. Wigand. 2022. Laying it on thick: Ecosystem effects of sediment placement on a microtidal Rhode Island salt marsh. Frontiers in Environmental Science 10: 939870.
Ray, G.L. 2007. Thin layer disposal of dredged material on marshes: A review of the technical and scientific literature. ACOE (U.S. Army Corps of Engineers), Vicksburg, MS.
Reimold, R.J., M.A. Hardisky, and P.C. Adams. 1978. The effects of smothering a ‘Spartina alterniflora’ salt marsh with dredged material. ACOE (U.S. Army Corps of Engineers), Vicksburg, MS.
Roman, C.T., J.A. Peck, J.R. Allen, J.W. King, and P.G. Appleby. 1997. Accretion of a New England (USA) salt marsh in response to inlet migration, storms, and sea-level rise. Estuarine, Coastal and Shelf Science 45 (6): 717–727.
Runting, R.K., B.A. Bryan, L.E. Dee, F.J. Maseyk, L. Mandle, P. Hamel, K.A. Wilson, K. Yetka, H.P. Possingham, and J.R. Rhodes. 2017. Incorporating climate change into ecosystem service assessments and decisions: A review. Global Change Biology 23 (1): 28–41.
Schröter, D., W. Cramer, R. Leemans, I.C. Prentice, M.B. Araújo, N.W. Arnell, A. Bondeau, H. Bugmann, T.R. Carter, C.A. Gracia, and C. Anne. 2005. Ecosystem service supply and vulnerability to global change in Europe. Science 310 (5752): 1333–1337.
Slocum, M.G., I.A. Mendelssohn, and N.L. Kuhn. 2005. Effects of sediment slurry enrichment on salt marsh rehabilitation: Plant and soil responses over seven years. Estuaries 28 (4): 519–528.
Smith, E.P. 2020. Ending resilience on statistical significance will improve environmental inference and communication. Estuaries and Coasts 43: 1–6.
Stagg, C.L., and I.A. Mendelssohn. 2010. Restoring ecological function to a submerged salt marsh. Restoration Ecology 18: 10–17.
Takaya, C.A., L.A. Fletcher, S. Singh, K.U. Anyikude, and A.B. Ross. 2016. Phosphate and ammonium sorption capacity of biochar and hydrochar from different wastes. Chemosphere 145: 518–527.
Thomsen, A.S., J. Krause, M. Appiano, K.E. Tanner, C. Endris, J. Haskins, E. Watson, A. Woolfolk, M.C. Fountain, and K. Wasson. 2021. Monitoring vegetation dynamics at a tidal marsh restoration site: Integrating field methods, remote sensing and modeling. Estuaries and Coasts 45: 523–538.
Thorne, K.M., C.M. Freeman, J.A. Rosencranz, N.K. Ganju, and G.R. Guntenspergen. 2019. Thin-layer sediment addition to an existing salt marsh to combat sea-level rise and improve endangered species habitat in California, USA. Ecological Engineering 136: 197–208.
VanZomeren, C.M., J.F. Berkowitz, C.D. Piercy, and J.R. White. 2018. Restoring a degraded marsh using thin layer sediment placement: Short term effects on soil physical and biogeochemical properties. Ecological Engineering 120: 61–67.
Walker, J.B., S.A. Rinehart, W.K. White, E.D. Grosholz, and E.D. Long. 2021. Local and regional variation in effects of burrowing crabs on plant community structure. Ecology 102 (2): e03244.
Walters, D.C., and M.L. Kirwan. 2016. Optimal hurricane overwash thickness for maximizing marsh resilience to sea level rise. Ecology and Evolution 6 (9): 2948–2956.
Wasson, K., K. Raposa, M. Almeida, K. Beheshti, J.A. Crooks, A. Deck, N. Dix, C. Garvey, J. Goldstein, D.S. Johnson, S. Lerberg, P. Marcum, C. Peter, B. Puckett, J. Schmitt, E. Smith, K. St, K. Laurent, M. Tyrrell. Swanson, and R. Guy. 2019. Pattern and scale: Evaluating generalities in crab distributions and marsh dynamics from small plots to a national scale. Ecology 100 (10): e02813.
Wigand, C., T. Ardito, C. Chaffee, W. Ferguson, S. Paton, K. Raposa, C. Vandemoer, and E. Watson. 2017. A climate change adaptation strategy for management of coastal marsh systems. Estuaries and Coasts 40 (3): 682–693.
Wilbur, P. 1992. Thin-layer disposal: concepts and terminology. Environmental Effects of Dredging Information Exchange Bulletin D-92–1. Vicksburg, MS: U.S. Army Engineer Waterways Experiment Station.
Acknowledgements
We would like to thank Hank Brooks, Carl Cottle, Charlie Deaton, Anna Deck, Alex Demeo, Susie Fork, Evan Hill, Laura Hollander, Rikke Jeppesen, Sean McCain, Jordan Mora, Ken Pollak, Alex Sabo, Vitalii Sheremet, Mackenzie Taggart, and Robin Weber for help with field work. Habibata Sylla, Jayh’ya Gale-Cottries, and Bronwyn Sayre assisted with sample analysis, and Allison Noble helped with R coding. Finally, we are grateful to Nicole Carlozo, Caitlin Chaffee, Erin McLaughlin, Jo Ann Muramoto, Elizabeth Murray, Richard Nye, Christina Toms, Rob Tunstead, James Turek, and Cathy Wigand for serving on the project advisory committee.
Funding
A. Gray’s activity on this project was supported in part by USDA NIFA Hatch project number CA-R-ENS-5120-H and USDA Multi-State Project W4188. This work was sponsored by the National Estuarine Research Reserve System Science Collaborative, which supports collaborative research that addresses coastal management problems important to the reserves. The Science Collaborative is funded by the National Oceanic and Atmospheric Administration and managed by the University of Michigan Water Center.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by Linda Deegan.
Supplementary Information
Below is the link to the electronic supplementary material.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Raposa, K.B., Woolfolk, A., Endris, C.A. et al. Evaluating Thin-Layer Sediment Placement as a Tool for Enhancing Tidal Marsh Resilience: a Coordinated Experiment Across Eight US National Estuarine Research Reserves. Estuaries and Coasts 46, 595–615 (2023). https://doi.org/10.1007/s12237-022-01161-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12237-022-01161-y