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| one publication added to basket [317939] |
Sediment supply explains long‐term and large‐scale patterns in salt marsh lateral expansion and erosion
Ladd, C.J.T.; Duggan-Edwards, M.F.; Bouma, T.J.; Pagès, J.F.; Skov, M.W. (2019). Sediment supply explains long‐term and large‐scale patterns in salt marsh lateral expansion and erosion. Geophys. Res. Lett. 46(20): 11178-11187. https://dx.doi.org/10.1029/2019gl083315
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, meer
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| Author keywords |
lateral saltmarsh dynamics; sediment supply; wave fetch; sea level rise |
| Auteurs | | Top |
- Ladd, C.J.T.
- Duggan-Edwards, M.F.
- Bouma, T.J., meer
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| Abstract |
Salt marshes often undergo rapid changes in lateral extent, the causes of which lack common explanation. We combine hydrological, sedimentological, and climatological data with analysis of historical maps and photographs to show that long‐term patterns of lateral marsh change can be explained by large‐scale variation in sediment supply and its wave‐driven transport. Over 150 years, northern marshes in Great Britain expanded while most southern marshes eroded. The cause for this pattern was a north to south reduction in sediment flux and fetch‐driven wave sediment resuspension and transport. Our study provides long‐term and large‐scale evidence that sediment supply is a critical regulator of lateral marsh dynamics. Current global declines in sediment flux to the coast are likely to diminish the resilience of salt marshes and other sedimentary ecosystems to sea level rise. Managing sediment supply is not common place but may be critical to mitigating coastal impacts from climate change. |
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