Abstract
Baseline studies conducted in 1998 document the presence of robust, non-reef-building Acropora cervicornis thickets in shallow (3–7 m depth), near-shore waters off the coast of Fort Lauderdale, Florida, USA. These thickets thrive in a high-latitude environment, the northernmost in the continental USA, in the midst of potential anthropogenic stressors. Within thickets, the spatial variation in mean percent coral cover, macroalgal cover, scleractinian species richness, density of A. cervicornis juveniles, and the density and size of A. cervicornis colonies and fragments were recorded. Thicket size ranged between ~0.1 and 0.8 ha and mean coral cover varied between ~5 and 28%, with A. cervicornis accounting for ~87–97% of all scleractinians. Mean A. cervicornis colony and fragment densities per thicket were 1.3–3.3 colonies m−2 and 0.7–2.8 fragments m−2, respectively. Recruit densities varied between 0 and 1 ind. m−2. White band disease was detected at all thickets, with a mean A. cervicornis colony surface area affected of 1.8%. For all thickets, densities of the corallivorous polychaete Hermodice carunculata ranged between ~18 and 86 ind. ha−1, with predation scars affecting <0.2% of the A. cervicornis cover. These flourishing A. cervicornis thickets off Fort Lauderdale provide an interesting counterpoint to the declining and disease-stricken A. cervicornis populations reported in the Florida Keys and wider Caribbean.
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Acknowledgements
This publication is a result of research funded by the National Oceanic and Atmospheric Administration Coastal Ocean Program under award #NA06OA0390 to Nova Southeastern University for the National Coral Reef Institute. Special thanks are extended to H.A. Halter, B.D. Ettinger, R. Moyer, M. Berkle, and R.O. Wolcott for assistance with fieldwork. Thanks are also due to B. Walker for assistance with the study area map. The comments of three anonymous reviewers greatly strengthened this manuscript.
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Vargas-Ángel, B., Thomas, J.D. & Hoke, S.M. High-latitude Acropora cervicornis thickets off Fort Lauderdale, Florida, USA. Coral Reefs 22, 465–473 (2003). https://doi.org/10.1007/s00338-003-0336-z
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DOI: https://doi.org/10.1007/s00338-003-0336-z