Coral Reefs

Some of the regional Coral Reef Literature especially pertinent to Barbados Reefs

Coral species from another ocean may be the only way to save Caribbean reefs
Alejandro E. Camacho, et al., 2026 in PNAS “At a conservation meeting in Miami, Florida, last month aimed at discussing the plight of local coral reefs, a previously unthinkable idea was on the agenda. Scientists, legal scholars, policymakers, ethicists, and coral conservation practitioners explored whether the situation is now so dire that we should consider shipping coral species from the Indo-Pacific region thousands of miles away to be planted in western Atlantic waters. Based on the best available information, we believe the answer is yes: Western Atlantic reefs are in terminal decline, and we must be open to researching even the most radical solutions to save them.”

Crustose coralline algae can contribute more than corals to coral reef carbonate production
Cornwall, C.E Commun Earth Environ 4, 105 (2023).“The long-term development of coral reef frameworks and the net vertical accretion of reefs fundamentally underpins the provisioning of most reef-related ecosystem services. One area of particular concern at present is how rates of reef accretion are changing under ecological decline and what the consequences of this may be for the capacity of reefs to keep pace with near-future sea-level rise (SLR)…The review explores the advantages and limitations of these different approaches and outlines options for developing an integrated framework to link past, present and future reef accretion potential.”

Coral restoration can drive rapid increases in reef accretion potential
L.T. Toth et al., 2025 in Nature “Coral-reef degradation is disrupting the balance between reef accretion and erosion and threatening the persistence of essential coral-reef habitats. In south Florida, most reefs are already net eroding, and without intervention, valuable ecosystem services may be lost. Coral restoration holds the potential to reverse those trends; however, typical restoration monitoring does not adequately capture key geo-ecological functions. We addressed this knowledge gap using carbonate budgets and Structure-from-Motion models to evaluate the impact of coral restoration on reef-accretion potential and structural complexity at eight offshore and three inshore coral reefs in the Lower Florida Keys. Within 2–6 years following outplanting, restoration of rapidly growing A. cervicornis populations increased reef-accretion potential to 2.8 mm y− 1 and drove significant increases in structural complexity. There was no measurable impact of restoring slower-growing, massive corals on reef-accretion potential inshore; however, whereas the severe 2023 coral-bleaching event immediately following our study caused near-complete mortality of A. cervicornis, 59% of massive corals survived, highlighting potential trade-offs between coral growth and survival on future restoration efficacy. We conclude that although restoration can produce rapid, small-scale increases in reef-accretion potential, there remain important uncertainties about how and whether ecosystem-scale benefits of restoration on important geo-ecological reef functions can persist long term.”

Quantifying coral reef accretion in a changing world: approaches, challenges and emerging opportunities
Didier M de Bakker et al. 2025 in Cambridge Prisms Coastal Futures

The Caribbean Coral Reef: A Record of an Ecosystem Under Threat (Book)
ByWilliam K. Sacco, 2023. CRC Press.

View: Introduction, The Structure of a Reef..

An emerging coral disease outbreak decimated Caribbean coral populations and reshaped reef functionality
L Alvarez-Fili et al., 2021 “Diseases are major drivers of the deterioration of coral reefs, linked to major declines in coral abundance, reef functionality, and reef-related ecosystems services1-3. An outbreak of a new disease is currently rampaging through the populations of the remaining reef-building corals across the Caribbean region. The outbreak was first reported in Florida in 2014 and reached the northern Mesoamerican reef by summer 2018, where it spread across the ~ 450-km reef system only in a few months4. Rapid infection was generalized across all sites and mortality rates ranged from 94% to < 10% among the 21 afflicted coral species. This single event further modified the coral communities across the region by increasing the relative dominance of weedy corals and reducing reef functionality, both in terms of functional diversity and calcium carbonate production. This emergent disease is likely to become the most lethal disturbance ever recorded in the Caribbean, and it will likely result in the onset of a new functional regime where key reef-building and complex branching acroporids (a genus apparently unaffected) will once again become conspicuous structural features in reef systems with yet even lower levels of physical functionality.”

The transformation of Caribbean coral communities since humans
Cramer KL, wt al., 2021 in Ecology and Evolution 11:10098-10118. “The mass die-off of Caribbean corals has transformed many of this region’s reefs to macroalgal-dominated habitats since systematic monitoring began in the 1970s. Although attributed to a combination of local and global human stressors, the lack of long-term data on Caribbean reef coral communities has prevented a clear understanding of the causes and consequences of coral declines. We integrated paleoecological, historical, and modern survey data to track the occurrence of major coral species and life-history groups throughout the Caribbean from the prehuman period to the present. The regional loss of Acropora corals beginning by the 1960s from local human disturbances resulted in increases in the occurrence of formerly subdominant stress-tolerant and weedy scleractinian corals and the competitive hydrozoan Millepora beginning in the 1970s and 1980s. These transformations have resulted in the homogenization of coral communities within individual countries. However, increases in stress-tolerant and weedy corals have slowed or reversed since the 1980s and 1990s in tandem with intensified coral bleaching and disease. These patterns reveal the long history of increasingly stressful environmental conditions on Caribbean reefs that began with widespread local human disturbances and have recently culminated in the combined effects of local and global change.”

A Tale of Two Bermudas
Geoff Hurley in the Halifax Chronicle Herald Dec 20, 2025
About Bermuda but relevant to Barbados and other Caribbean islands “…as a retired fish­er­ies bio­lo­gist I was sur­prised to learn once we got there that Ber­muda is an island com­plex sur­roun­ded by waters with an eco­lo­gical col­lapse in pro­gress…Ber­muda is an import­ant “devel­op­mental hab­itat” for juven­ile green turtles. The green turtle, once hunted to near extinc­tion, is now a cel­eb­rated con­ser­va­tion vic­tory. Dec­ades of work pro­tect­ing nest­ing beaches and redu­cing har­vest­ing mainly in other Mid-atlantic and Carib­bean jur­is­dic­tions (green turtles rarely nest in Ber­muda) has helped pop­u­la­tions rebound. But this tri­umph is only half the story. The abund­ance of sharks, apex pred­at­ors, that reside or pass through Ber­muda waters has been declin­ing for dec­ades primar­ily due to over­fish­ing in local and inter­na­tional waters. With their nat­ural pop­u­la­tion con­trol dimin­ished, the recov­er­ing turtles have found them­selves in an eco­lo­gical vacuum. This twin leg­acy of pro­tec­tion and pred­a­tion has spawned a silent under­wa­ter emer­gency: severe over­graz­ing of seagrass mead­ows. Where once lush under­wa­ter prair­ies waved, vital nurs­er­ies for fish and car­bon-stor­ing power­houses, now lie bar­ren stretches of sand, a sub­mar­ine dust bowl. The turtles, in their hungry suc­cess, are lit­er­ally eat­ing them­selves out of house and home thereby degrad­ing a found­a­tional eco­sys­tem. This isn’t mere land­scape alter­a­tion; it’s the sys­tem­atic loss of a crit­ical hab­itat, with juven­ile turtles now stun­ted and under­weight, graz­ing on ever-thin­ner resources…The crisis deep­ens at the reef ’s edge. Ber­muda’s coral reefs, already facing the global stressors of global warm­ing and acid­i­fic­a­tion, now bear an addi­tional, loc­al­ized bur­den. The seagrass mead­ows, in their healthy state, acted as water-fil­tra­tion sys­tems and sed­i­ment traps. Their loss means more silt and nutri­ents wash onto the cor­als, exacer­bat­ing dis­ease and smoth­er­ing del­ic­ate polyps. The vibrant, com­plex reef city, which buf­fers the island from storm waves and sup­ports fish­er­ies, is being under­mined by the fam­ine on the adja­cent seabed…This presents a pro­found con­tra­dic­tion. How can a soci­ety adept at man­aging its fin­ances, its infra­struc­ture and its ter­restrial envir­on­ment appear almost para­lyzed in the face of this slow-motion under­wa­ter dis­aster?