Disturbance of sedimentary processes in tidal salt marshes invaded by exotic vegetation

Choi, Sun Min; Seo, Jun Young; Jeong, Seong Woon; Lee, Moo Joon; Ha, Ho Kyung

doi:10.1016/j.scitotenv.2021.149303

Cited by 8 publications

(1 citation statement)

References 53 publications

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“…Firstly, we found that significant wave heights at the marsh edge exhibited comparable magnitudes and patterns as those at mudflats (Figures 3b and 3d). This observation aligns well with the findings that waves can cause the re-suspension of sediment and the erosion of the marsh edge, occasionally contributing to the collapse of the marsh edge and lateral erosion (Callaghan et al, 2010;Finotello et al, 2020;Choi et al, 2021).…”

Section: Different Wave Impacts On Sediment Transport Regimessupporting

confidence: 89%

Conditional effects of tides and waves on sediment supply to salt marshes

Sun,

Prooijen,

Wang

et al. 2024

Preprint

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The survival of salt marshes, especially facing future sea-level rise, requires the supply of sediment. Sediment can be supplied to salt marshes via two routes: through marsh creeks and over marsh edges. However, the conditions of tides and waves that facilitate sediment import through these two routes remain unclear. To better understand when and how sediment import towards salt marshes occurs, measurements spanning two months were conducted in Paulina Saltmarsh. The results show that the marsh creek and the marsh edge do not import sediment simultaneously. The marsh creek tends to import sediment during neap tides with waves. A small tidal range results in weaker flow during ebb tides, reducing the export of sediment. Strong waves, particularly during this period, enhance the sediment supply from mudflats to the marsh creek. Additionally, waves can directly affect sediment re-suspension in the marsh creek during spring tides when the water level is above the marsh canopy. The marsh edge benefits from contrasting tidal and wave conditions, with sediment imported during spring tides with weak waves. Waves during spring tides re-suspend sediment, impeding the sediment deposition, and thus leading to sediment export over the marsh edge. These results highlight the potential sediment transport routes to marshes under varying conditions, shedding light on their implications for the long-term survival of salt marshes.

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Section: Different Wave Impacts On Sediment Transport Regimessupporting

confidence: 89%

Conditional effects of tides and waves on sediment supply to salt marshes

Sun,

Prooijen,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

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Can We Protect China's Northern Coast Wetlands From Tidal Dynamics by Restoring Native Species After Spartina alterniflora Is Eradicated? A Model‐Based Analysis

Liu,

Wang,

Zhao

et al. 2024

Land Degrad Dev

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In recent years, the Chinese government has implemented a series of initiatives with the objective of eradicating the invasive Spartina alterniflora along the entire coastline. This has given rise to concerns about the potential for subsequent coastal erosion and salt marsh shrinkage. This study introduces a novel contribution in the form of a model‐based analysis, grounded in fieldwork from the Yellow River Delta, which assesses the potential of native Suaeda salsa as an alternative for coastal protection. Our approach is distinctive in that it not only compares the flow velocity reduction effects of S. alterniflora and S. salsa, but also evaluates the efficacy of three distinct planting patterns in managing tidal dynamics. In this study, we present a significant finding: while both species can mitigate tidal flow velocity, S. alterniflora shows superior performance, which represents a novel point of discussion in the field of coastal wetland management. Furthermore, our research indicates that dense aggregated planting patterns are particularly effective during storm surges, offering a strategic insight for future ecological engineering. However, we recognize the potential limitations of our approach, including the need for continuous management to control the spread of S. alterniflora and the necessity for further research to optimize the restoration potential of S. salsa under varying tidal conditions. Our findings highlight the importance of a balanced approach, suggesting the retention of a portion of S. alterniflora while also emphasizing the strategic planting of S. salsa in high‐density configurations to enhance coastal resilience.

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