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Ecol Appl. 2018 Jun;28(4):871-877. doi: 10.1002/eap.1722. Epub 2018 Apr 27.

Living shorelines enhanced the resilience of saltmarshes to Hurricane Matthew (2016).

Author information

1
Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, North Carolina, 28557, USA.
2
North Carolina Coastal Reserve and National Estuarine Research Reserve, Beaufort, North Carolina, 28516, USA.
3
Department of Biology and Institute for Coastal Science and Policy, Eastern Carolina University, Greenville, North Carolina, 27858, USA.

Abstract

Nature-based solutions, such as living shorelines, have the potential to restore critical ecosystems, enhance coastal sustainability, and increase resilience to natural disasters; however, their efficacy during storm events compared to traditional hardened shorelines is largely untested. This is a major impediment to their implementation and promotion to policy-makers and homeowners. To address this knowledge gap, we evaluated rock sill living shorelines as compared to natural marshes and hardened shorelines (i.e., bulkheads) in North Carolina, USA for changes in surface elevation, Spartina alterniflora stem density, and structural damage from 2015 to 2017, including before and after Hurricane Matthew (2016). Our results show that living shorelines exhibited better resistance to landward erosion during Hurricane Matthew than bulkheads and natural marshes. Additionally, living shorelines were more resilient than hardened shorelines, as they maintained landward elevation over the two-year study period without requiring any repair. Finally, rock sill living shorelines were able to enhance S. alterniflora stem densities over time when compared to natural marshes. Our results suggest that living shorelines have the potential to improve coastal resilience while supporting important coastal ecosystems.

KEYWORDS:

Spartina alterniflora ; bulkhead; coastal resilience; erosion; green infrastructure; hardened shoreline; hurricane; living shoreline; marsh sill; rock sill; saltmarsh; storm

PMID:
29702741
DOI:
10.1002/eap.1722

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