Journal
LIMNOLOGY AND OCEANOGRAPHY LETTERS
Volume 7, Issue 3, Pages 210-217Publisher
WILEY
DOI: 10.1002/lol2.10256
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Funding
- Virginia Commonwealth Research Fellowship
- VIMS Graduate Research Grants
- Virginia Port Authority, Virginia's Commonwealth Technology Research Fund
- University of Texas at Austin [TG-OCE130032]
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The study demonstrates two different responses of tidal marshes to sea-level rise: an increase in tidal range if marsh accretion can keep up, and a decrease in tidal range if marsh accretion falls behind. The interaction between tidal range changes and marsh evolution may enhance the resilience of marshes to sea-level rise.
The response of tidal range in tidal marshes under sea-level rise (SLR) is essential to the marsh resilience, but how tidal ranges respond to different marsh evolutions remains unclear. Here, we show the existence of bifurcate responses of tidal range to SLR using both numerical model and theoretical analyses. The tidal range tends to increase if marsh accretion keeps pace with SLR; otherwise, the tidal range tends to decrease. As tidal range plays the key role in marsh evolution, the interactions between changing tidal range and marsh evolution lead to positive feedback on marsh resilience. If the marsh accretion can keep up with the SLR, the increase in the tidal range can enhance marsh resilience to SLR. If the marsh cannot keep up, the decrease in the tidal range may further threaten the marsh resilience or even lead to marsh retreat.
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