Storm surge, not wind, caused mangrove dieback in southwest Florida following Hurricane Irma

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Authors

David Lagomasino , Lola Fatoyinbo, Edward Castaneda, Bruce Cook, Paul Montesano, Christopher Neigh, Lawrence Corp, Lesley Ott, Selena Chavez, Douglas Morton

Abstract

Mangroves buffer inland ecosystems from hurricane winds and storm surge. However, their ability to withstand harsh cyclone conditions depends on plant traits and geomorphology. Using airborne lidar and satellite imagery collected before and after Hurricane Irma, we estimated that 62% of mangroves in southwest Florida suffered canopy damage, with largest impacts in tall forests (>10 m). Mangroves on well-drained sites (83%) flushed new leaves within one year after the storm. In poorly-drained sites, Irma triggered one of the largest mangrove diebacks ever recorded (10,760 ha), primarily affecting low elevation and interior mangrove areas dominated or co-dominated by A. germinans (73%). Our results show storm surge and ponding caused dieback, not wind. Identifying and monitoring vulnerable, low-lying coastal areas is essential to mitigate mangrove dieback from future storms.

DOI

https://doi.org/10.31223/osf.io/q4exh

Subjects

Environmental Monitoring, Environmental Sciences, Other Environmental Sciences, Physical Sciences and Mathematics

Keywords

remote sensing, Hurricane, forest, LiDAR, Storm surge, canopy height, forest degradation, mangrove, resilience, tropical cyclone

Dates

Published: 2020-07-01 19:01

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License

CC BY Attribution 4.0 International

Additional Metadata

Data Availability (Reason not available):
Datasets are currently embargoed at PANGAEA and will be released pending the full acceptance of the manuscript in a peer-reviewed journal.

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