Fatty Acid Dynamics in Coral Ecosystems

Fatty acids constitute a linchpin in coral physiology and the broader reef ecosystem, mediating energy storage, membrane structure and interorganismal exchanges within the coral holobiont. The intricate pools of saturated, monounsaturated and polyunsaturated fatty acids underpin the fluidity and permeability of host and symbiont membranes, while neutral lipids are sequestered in lipid bodies to buffer diel metabolic flux. These molecular species respond dynamically to environmental variables—such as temperature, light regime and nutrient availability—driving seasonal oscillations in acyl-chain saturation and guiding mutualistic nutrient transfer between coral hosts and their dinoflagellate symbionts. In cold-water habitats, fatty acid trophic markers reveal shifts in diet composition that correspond to phenotypic performance trade-offs, highlighting the role of essential polyunsaturated fatty acids in sustaining growth under resource limitation. Conversely, in shallow tropical reefs, variations in glycolipid and betaine-lipid profiles illuminate thermal-tolerance mechanisms within Symbiodiniaceae, with implications for bleaching resilience. Comprehensive lipidomic investigations now permit high-resolution delineation of phospholipid and glycolipid molecular species, expanding our understanding of biosynthetic pathways, compartmental lipid regulation and the ecological consequences of reef degradation. Such insights inform the development of molecular indicators of reef health and contribute to predictive models of reef response under climate change.

Research from Nature Portfolio

Recent work has combined cell fractionation with high-resolution mass spectrometry to compare the lipidomes of coral host plasma membranes and intracellular symbionts, uncovering distinct phospholipid and betaine-lipid species whose acyl-chain saturation shifts with seasonal temperature variations, thereby modulating membrane fluidity and nutritional exchange. In addition, time-series lipidome studies have shown that coral lipid bodies act as central hubs for triacylglycerol, sterol ester and free fatty acid trafficking across diel cycles, revealing a light-driven metabolic relay that underpins the dynamic regulation of host–symbiont interactions.

Fatty Acid Dynamics in Coral Ecosystems publication trend

The graph below shows the total number of articles in fatty acid dynamics in coral ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Lipidome: The complete complement of lipid molecules within a cell, tissue or organism, encompassing all lipid classes and molecular species.

Phospholipid: A class of membrane lipids composed of glycerol bound to fatty acyl chains and a phosphate-containing head group, critical for cellular membrane structure and function.

Glycolipid: Lipids bearing carbohydrate moieties, found in photosynthetic membranes of symbiotic dinoflagellates and involved in membrane stability under thermal stress.

Betaine lipid: A non-phosphorus lipid containing a quaternary amine head group, substituting for phospholipids in some marine organisms and contributing to membrane adaptation.

Lipid body: Intracellular organelles in coral host cells that store neutral lipids such as triacylglycerols and sterol esters, acting as reservoirs for metabolic and symbiotic trafficking.

Fatty acid trophic marker (FATM): Specific fatty acids used as biochemical tracers to infer dietary sources and trophic interactions in marine organisms.

References

1. Membrane vectorial lipidomic features of coral host cells’ plasma membrane and lipid profiles of their endosymbionts Cladocopium. Communications Biology (2024).
2. Coral Lipidome: Molecular Species of Phospholipids, Glycolipids, Betaine Lipids, and Sphingophosphonolipids. Marine Drugs (2023).
3. Lipid biomarkers reveal trophic relationships and energetic trade‐offs in contrasting phenotypes of the cold‐water coral Desmophyllum dianthus in Comau Fjord, Chile. Functional Ecology (2023).
4. Lipidome analysis of Symbiodiniaceae reveals possible mechanisms of heat stress tolerance in reef coral symbionts. Coral Reefs (2019).
5. Coral lipid bodies as the relay center interconnecting diel-dependent lipidomic changes in different cellular compartments. Scientific Reports (2017).