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<p>Shoreline erosion presents a critical challenge to coastal management and resiliency and is increasingly being addressed by strategies incorporating natural and nature-based features (or nature-based solutions) that combine shoreline protection and ecosystem services. Living shorelines (here, created marshes with adjacent sills) are one of these strategies, but the performance of individual sites varies widely over both space and time. Sustained time series at individual sites are needed to help untangle site-specific results from broader trends but are lacking. This study uses 3&#xa0;years of annual surveys at four sites (2–5&#xa0;years old) in mesohaline Chesapeake Bay to evaluate small-scale variability in sediment and vegetation characteristics and to compare results with those from nearby older (~ 10&#xa0;years old) living shorelines. Sediment and vegetation characteristics varied among sites with the same age, sampled at the same time, and in close proximity, highlighting the need for sustained time series at individual sites to better understand living shoreline performance. In general, sediment parameters (mud and organic content) were correlated with age, while vegetation characteristics (stem height and density) showed complex interactions with environmental factors (e.g., wind speed and direction and fetch). On average, it would take these sites ~ 5–7&#xa0;years for mud and organic content, and &gt; 10&#xa0;years for sedimentation rates, to reach a dynamic equilibrium.</p>

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Drivers of Vegetation and Sediment Development Differ in the Created Marshes of Living Shorelines

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Cindy M. Palinkas,
  • Lorie W. Staver

摘要

Shoreline erosion presents a critical challenge to coastal management and resiliency and is increasingly being addressed by strategies incorporating natural and nature-based features (or nature-based solutions) that combine shoreline protection and ecosystem services. Living shorelines (here, created marshes with adjacent sills) are one of these strategies, but the performance of individual sites varies widely over both space and time. Sustained time series at individual sites are needed to help untangle site-specific results from broader trends but are lacking. This study uses 3 years of annual surveys at four sites (2–5 years old) in mesohaline Chesapeake Bay to evaluate small-scale variability in sediment and vegetation characteristics and to compare results with those from nearby older (~ 10 years old) living shorelines. Sediment and vegetation characteristics varied among sites with the same age, sampled at the same time, and in close proximity, highlighting the need for sustained time series at individual sites to better understand living shoreline performance. In general, sediment parameters (mud and organic content) were correlated with age, while vegetation characteristics (stem height and density) showed complex interactions with environmental factors (e.g., wind speed and direction and fetch). On average, it would take these sites ~ 5–7 years for mud and organic content, and > 10 years for sedimentation rates, to reach a dynamic equilibrium.