The Effects of Reduced Tidal Flushing on Mangrove Structure and Function Across a Disturbance Gradient |
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Authors: | Rachel J Harris Eric C Milbrandt III" target="_blank">Edwin M EverhamIII Brian D Bovard |
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Institution: | (1) Department of Marine and Ecological Science, Florida Gulf Coast University, 10501 FGCU Blvd. South, Fort Myers, FL 33965, USA;(2) Marine Laboratory, Sanibel–Captiva Conservation Foundation, 900A Tarpon Bay Rd., Sanibel, FL 33957, USA |
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Abstract: | The effects of reduced tidal flushing on post-hurricane mangrove recovery were measured across a gradient of hurricane disturbance
(in order of decreasing wind intensity: Captiva, North Sanibel, Central Sanibel, and East Sanibel). Each region consisted
of replicate study plots with either reduced tidal exchange (tidally restricted location) or an open tidal connection (tidally
unrestricted location). Locations with reduced tidal exchange displayed significantly lower (two-way ANOVA, p ≤ 0.0001) tidal amplitude, decreased seedling densities, and decreased productivity (recruitment, growth, and litter fall)
when compared to the tidally unrestricted locations. Results also indicated significant regional variations in measures of
mangrove stand structure (seedlings and canopy) and productivity (recruitment, growth, and litter fall) up to 4-years post-hurricane
disturbance. These findings suggest that the legacy effects from hurricane disturbance vary with degree of wind intensity,
acting both independently and synergistically with the effects of tidal restriction to influence post-hurricane mangrove structure
and function. |
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Keywords: | |
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