Success of restoration strategies in preventing extirpation of 2 critically endangered coral species

Conservation Biology
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Abstract

An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected. These species have been the primary focus of reef restoration in Florida for decades. Substantial losses of these species occurred in outplanted populations, in ocean-based nurseries, and among remnant wild colonies, leading to uncertainty over their future in the Florida Keys, given recent observed trends in climate conditions. However, the past 2 decades of restoration activity created a community of experts, a network of ocean-based and land-based coral-rearing infrastructure, and 2 independent land-based coral gene banks that prevented regional extirpation and preserved much of the genetic richness of these critically endangered coral species. Without the past decades of effort and the emergency response associated with the 2023 bleaching event, Florida acroporids would largely have been lost. This outcome afforded by the restoration network in Florida demonstrates the value of proactively establishing resources prior to major disturbances. We identified several critical strategies that, in the context of existing climate change, are preventing the extirpation of coral species in Florida, including extending collaborative restoration efforts to solidify a network of trained experts; establishing trust-focused relationships among management agencies and restoration groups; testing direct interventions to reduce light and temperature stress early during thermal anomalies; developing redundant ocean-based and land-based nurseries; and establishing living coral gene banks prior to major threats to prevent the extirpation of coral species.

Suggested Citation

Muller, E.M., Ladd, M.C., Karp, R.F., Montoya-Maya, P.H., Kuffner, I.B., Baker, A.C., Bartels, E., Bourque, A., Clark, A.S., Cox, N., D’Alessandro, M., Daughtry, B., Firchau, B., Fix, L., Gilliam, D.S., Hesley, D., Lewis, C., Lirman, D., Lustic, C., Macauley, K., Moore, J., Nedimyer, K., O’Neil, K., Parsons, K.T., Smith, K.M., Spadaro, J., Thomasson, B.C., Unsworth, J.D., Vaughan, D., and Miller, M.W., 2025, Success of restoration strategies in preventing extirpation of 2 critically endangered coral species: Conservation Biology, v. 40, no. 2, e70168, 12 p., https://doi.org/10.1111/cobi.70168.

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Publication type Article
Publication Subtype Journal Article
Title Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Series title Conservation Biology
DOI 10.1111/cobi.70168
Volume 40
Issue 2
Publication Date November 22, 2025
Year Published 2025
Language English
Publisher Society for Conservation Biology
Contributing office(s) St. Petersburg Coastal and Marine Science Center
Description e70168, 12 p.
Country United States
State Florida
Additional publication details