Ecological and Evolutionary Dynamics of Black Corals

Black corals (Order Antipatharia) are long‐lived, slow‐growing anthozoans distinguished by a chitinous skeleton and a predominantly heterotrophic mode of nutrition. They form structurally complex habitats from shallow mesophotic reefs to the abyssal plains, serving as foundation species that enhance local biodiversity. Evolutionary analyses indicate that black corals represent an ancient lineage within Hexacorallia, with deep divergences reflected in both mitochondrial and nuclear markers. Recent work has revealed unexpected physiological strategies, including mixotrophy and facultative symbioses, while population genomic studies have begun to unravel patterns of larval dispersal and genetic connectivity. These insights inform conservation strategies, as black coral forests face threats from deep‐sea fishing, climate change and mineral exploitation, underscoring their global significance and need for targeted management.

Research from Nature Portfolio

Recent investigations have documented the first dense forest of Antipathella subpinnata in the Adriatic Sea at mesophotic depths. Colony densities in this habitat rival those of better‐known tropical reefs, and ocean currents have been shown to govern local distribution by supplying food particles and removing waste. The associated fauna includes commercially important species, highlighting both the ecological value and vulnerability of these forests. Findings emphasise the urgent need to extend marine protected areas and enforce fishing regulations to safeguard these carbon‐sequestering ecosystems.

Ecological and Evolutionary Dynamics of Black Corals publication trend

The graph below shows the total number of articles in ecological and evolutionary dynamics of black corals across all publications each year (not limited to Nature Index journals).

Technical terms

Mesophotic coral ecosystem (MCE): A light-limited reef community at intermediate depths (approximately 30–150 m) that supports both photosynthetic and heterotrophic organisms.

Azooxanthellate: Describes corals lacking photosynthetic algal symbionts and relying entirely on heterotrophic feeding to meet metabolic demands.

Symbiodiniaceae: A family of dinoflagellate microalgae capable of forming symbiotic associations with corals, often contributing to host nutrition in low-light conditions.

Genetic connectivity: The exchange of individuals or gametes among populations that promotes gene flow and influences resilience to environmental change.

Propagules: Dispersive reproductive units such as larvae or spores that can establish new colonies and drive population replenishment.

References

1. A mesophotic black coral forest in the Adriatic Sea. Scientific Reports (2020).
2. Lost in the dark: Antipatharia-Symbiodiniaceae association in the deep waters of the Red Sea. Frontiers in Marine Science (2024).
3. Distribution and ecology of shallow-water black corals across a depth gradient on Galápagos rocky reefs. Coral Reefs (2024).
4. Population genomic structure of the black coral Antipathella subpinnata in Mediterranean Vulnerable Marine Ecosystems. Coral Reefs (2021).