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<p>Coastal foredunes protect inland areas from flooding during major storms, yet little is known about the role of plant community functional traits on dune storm response and evolution. Our objective was to examine how dune geomorphology and plant community characteristics influence ecogeomorphic responses immediately after and two years following a major storm event (Hurricane Dorian). We hypothesized that (1) pre-storm dune vegetation, morphology, and site history interact to drive short-term post-storm response and (2) over interannual timescales, the culmination of these factors are important drivers of dune evolution. We surveyed two foredune locations of differing site histories in Duck, North Carolina, USA for vegetation composition and traits and dune morphometrics prior to, immediately following, and two years after Hurricane Dorian, and evaluated their effects on elevation change (i.e. net accretion and erosion). We found that elevation change immediately following Hurricane Dorian and over interannual timescales were predicted by position along the dune profile and local-scale plant community diversity and trait metrics, while site history was important for explaining elevation change over interannual timescales. Our study contributes to an improved understanding of drivers of dune evolution across scales.</p>

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Foredune Plant Community and Recent Ecogeomorphic History Influence Dune Elevation at Storm and Interannual Scales

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Shannon L. Walker,
  • Nicholas Cohn,
  • Julie C. Zinnert

摘要

Coastal foredunes protect inland areas from flooding during major storms, yet little is known about the role of plant community functional traits on dune storm response and evolution. Our objective was to examine how dune geomorphology and plant community characteristics influence ecogeomorphic responses immediately after and two years following a major storm event (Hurricane Dorian). We hypothesized that (1) pre-storm dune vegetation, morphology, and site history interact to drive short-term post-storm response and (2) over interannual timescales, the culmination of these factors are important drivers of dune evolution. We surveyed two foredune locations of differing site histories in Duck, North Carolina, USA for vegetation composition and traits and dune morphometrics prior to, immediately following, and two years after Hurricane Dorian, and evaluated their effects on elevation change (i.e. net accretion and erosion). We found that elevation change immediately following Hurricane Dorian and over interannual timescales were predicted by position along the dune profile and local-scale plant community diversity and trait metrics, while site history was important for explaining elevation change over interannual timescales. Our study contributes to an improved understanding of drivers of dune evolution across scales.