Solving hindered groundwater dynamics in restored tidal marshes by creek excavation and soil amendments: A model study

Putte, Niels Van; Meire, Patrick; Seuntjens, Piet; Joris, Ingeborg; Verreydt, Goedele; Hambsch, Lorenz; Temmerman, Stijn

doi:10.1016/j.ecoleng.2022.106583

Cited by 7 publications

(3 citation statements)

References 74 publications

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“…Scaling irrigation presents logistical challenges and resource conflicts, as water is often highly managed and can be scarce in the landscapes where it is most needed. Some restoration efforts have focused on increasing tidal creek density (Van Putte et al 2022). Others have attempted seawater irrigation input using diversion canals from natural channels, but seawater often does not ameliorate stress as effectively as freshwater (Xie et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Testing strategies to enhance transplant success under stressful conditions at a tidal marsh restoration project

Pausch

2024

Restoration Ecology

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Tidal marsh restoration is becoming an increasingly common tool to plan for future sea level rise. Subsided marshes' elevation can be restored through sediment additions, which may necessitate the reestablishment of vegetation. Understanding key actions to increase vegetation cover at areas that remain persistently bare following elevation restoration is a critical component of a project's long‐term success. Dominant species can shape ecosystem function, as well as ameliorate stressful environments. We transplanted the dominant species, Salicornia pacifica, into bare areas of a restored tidal marsh in central California, United States, 3 years following a sediment addition. We tested salt hardening of plants before transplanting, targeted irrigation, transplant size, and planting configuration to identify management actions that could help vegetation persist in the most stressful areas of the high marsh. Weekly targeted irrigation until the first rains began was critical for small plant survivorship. We found that larger plants had increased survivorship and contributed higher amounts of growth and cover but did not facilitate the performance of nearby smaller plants. After 2 years, we determined that using lone, larger plants was more cost‐effective than multiple smaller plants at our tidal marsh. However, performance was highly site‐specific with dramatically less growth at a drier site with sandier soil. Our results highlight the importance of identifying site‐specific restoration strategies that either ameliorate or help plants tolerate stressful conditions, contributing to the continued success of tidal marsh restoration for climate resilience.

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Section: Discussionmentioning

confidence: 99%

Testing strategies to enhance transplant success under stressful conditions at a tidal marsh restoration project

Pausch

2024

Restoration Ecology

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“…Although some prior studies have noted the deficiency of overlooking heterogeneity in drainage conditions (Morris et al 2013, Kirwan and Guntenspergen 2015, McLain et al 2020, Van Putte et al 2022, to our knowledge, no field studies have been conducted to quantify the deviation from elevation-and tidally-based estimations that can be attributed to spatial variation in drainage conditions. To address this, we selected two deteriorating marsh platforms in the Chesapeake Bay, United States.…”

Section: Introductionmentioning

confidence: 99%

“…However, whether the hydrological stress experienced by marsh plant can be represented by elevation and tidal regime alone is still questionable, as hydrological conditions, especially groundwater dynamics can also be greatly influenced by distance from outlets such as tidal creeks and drainage conditions (Ursino et al 2004, Van Putte et al 2022, Xin et al 2022. For example, in field studies, wave attenuation by marsh vegetation was observed as reduction in wave height over distance traveled (Möller et al 2014, Stark et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Elevation, drainage, and spatially heterogeneous vulnerability of tidal marshes to sea level rise

Qi,

Gedan

2023

Preprint

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Marsh plants regulate marsh surface elevation through organic matter accumulation and sediment capturing, thus feedback loops and relationships between vegetation and marsh elevation form the basis of numerical models that estimate and predict marsh vulnerability to Sea Level Rise (SLR). However, with interior portions of shallow-sloping microtidal marshes suffering much more extensive inundation relative to edge marshes, it is necessary to identify factors in addition to elevation that create spatial heterogeneity in flood vulnerability. Here we studied the influence of drainage on vulnerability of the marsh interior and the marsh edge. Specifically, we compared the deviation of in situ observed hydrological metrics for surface (hydroperiod, daily inundation duration) and subsurface (soil saturation index, or SSI) soil levels of interior and edge marsh from expected values estimated using elevation and tidal regime alone. We further analyzed the bias that hydrological deviation introduced to marsh vulnerability estimation using growth response curves of typical marsh macrophytes to hydroperiod. We found that the water table fluctuation was attenuated from marsh edge to interior, which resulted in a higher sensitivity of interior marsh to elevation deficiency. At the brim of marsh collapse in the marsh interior, hydroperiod and SSI increased dramatically; they were 20-50% higher than at the same elevation at the marsh edge, which greatly reduces the window of opportunity for interior marsh plant communities to adapt to SLR. Our findings demonstrate the importance of drainage in explaining spatial patterns in vulnerability across the marsh platform, which should be considered in future empirical studies and numerical simulations to develop practical tools for coastal management.

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Effects of Vegetation Restoration Age on Soil C: N: P Stoichiometry in Yellow River Delta Coastal Wetland of China

Cao,

Wang,

Chu

et al. 2024

Chin. Geogr. Sci.

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Solving hindered groundwater dynamics in restored tidal marshes by creek excavation and soil amendments: A model study

Cited by 7 publications

References 74 publications

Testing strategies to enhance transplant success under stressful conditions at a tidal marsh restoration project

Testing strategies to enhance transplant success under stressful conditions at a tidal marsh restoration project

Elevation, drainage, and spatially heterogeneous vulnerability of tidal marshes to sea level rise

Effects of Vegetation Restoration Age on Soil C: N: P Stoichiometry in Yellow River Delta Coastal Wetland of China

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