Phase shift to algal dominated communities at mesophotic depths associated with lionfish (Pterois volitans) invasion on a Bahamian coral reef
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Mesophotic coral reefs (30–150 m) have been assumed to be physically and biologically connected to their shallow-water counterparts, and thus may serve as refugia for important taxonomic groups such as corals, sponges, and fish. The recent invasion of the Indo–Pacific lionfish (Pterois volitans) onto shallow reefs of the Caribbean and Bahamas has had significant, negative, effects on shallow coral reef fish populations. In the Bahamas, lionfish have extended their habitat range into mesophotic depths down to 91 m where they have reduced the diversity of several important fish guilds, including herbivores. A phase shift to an algal dominated (>50% benthic cover) community occurred simultaneously with the loss of herbivores to a depth of 61 m and caused a significant decline in corals and sponges at mesophotic depths. The effects of this invasive lionfish on mesophotic coral reefs and the subsequent changes in benthic community structure could not be explained by coral bleaching, overfishing, hurricanes, or disease independently or in combination. The significant ecological effects of the lionfish invasion into mesophotic depths of coral reefs casts doubt on whether these communities have the resilience to recover themselves or contribute to the recovery of their shallow water counterparts as refugia for key coral reef taxa.
KeywordsLionfish Coral reefs Mesophotic Phase shifts Herbivory Mezograzers
We thank our colleagues N. Alvarado, E. Kintzing, B. Kakuk, and M. Lombardi for assistance on our deep technical dives, and D.J. Gochfeld and C.M. Diaz for additional field and laboratory support. We also thank Dr. Miquel De Cáceres Ainsa for his help with the STImodels and cascadeKM functions in R. This project was funded by grants from the NOAA Ocean Exploration and National Undersea Research Programs, NOAA’s National Institute for Undersea Science and Technology and the National Science Foundation. The views expressed herein are those of the authors and do not necessarily reflect the views of these agencies. All experiments conducted for this study comply with the current laws of the Bahamas and the United States of America.
- Calderon EN, Zilberberg C, de Paiva PC (2007) The possible role of Ecinometra lacunteri (Echinodermata: Echinoidea) in the local distribution of Darwinnela sp. (Porifera: Dendroceratida) in Arraial do Cabo, Rio de Janeiro State, Brazil. In: Custódio MR, Lôbo-Hajdu G, Hajdu E, Muricy G (eds) Porifera research: biodiversity, innovation and sustainability. Museu Nacional, Rio de Janeiro, pp 211–217Google Scholar
- Diamond JM (1986) Overview: laboratory experiments, field experiments, and natural experiments. In: Diamond J, Case TJ (eds) Community ecology. Harper and Row, New York, pp 3–22Google Scholar
- Hare JA, Whitfield PE (2003) An integrated assessment of the introduction of lionfish (Pterois volitans/miles complex) to the western Atlantic Ocean. NOAA Technical Memorandum NOS NCCOS 2, 21 ppGoogle Scholar
- Hendler G, Miller JE, Pawson DL et al. (1995) Echinoderms of Florida and the Caribbean Sea Stars, Sea Urchins, and Allies. Smithsonian Institute, 390 ppGoogle Scholar
- Liddell WD, Avery WE, Ohlhorst SL (1997) Patterns of benthic community structure, 10–250 m, the Bahamas. Proc 8th Int Coral Reef Symp 1: 437–442Google Scholar
- Oxenford HA, Fanning P, Cowen RK (2008) Spatial distribution of surgeonfish (Acanthuridae) pelagic larvae in the Eastern Caribbean. In: Grober-Dunsmore R, Keller BD (eds) Caribbean connectivity: implications for marine protected area management. NOAA Marine Sanctuaries Conservation Series ONMS-08-07. pp 42–51Google Scholar
- Randall JE (1967) Food habits of reef fishes of the West Indies. Stud Trop Oceanogr 5:665–847Google Scholar