Natural Products from Antarctic Marine Invertebrates

The Antarctic marine ecosystem is a reservoir of distinctive chemical entities produced by invertebrate fauna that have evolved under extreme cold, high pressure and seasonal light regimes. Sponges, ascidians, corals, bryozoans, echinoderms and molluscs employ a rich palette of secondary metabolites—among them terpenoids, polyketides, peptides and alkaloids—to mediate ecological interactions, including defence against predation, competition for space and microbial fouling. The unique biosynthetic pathways underpinning these compounds often incorporate halogenation, unusual cyclisations and cold‐adapted enzymatic systems, yielding molecules with potent bioactivities such as antimicrobial, antifouling and anticancer properties. Symbiotic relationships with cold‐adapted microorganisms further expand this chemical repertoire, as bacterial and fungal associates generate complementary allelochemicals. Continued exploration of Antarctic invertebrates not only enhances our understanding of polar chemical ecology but also holds promise for novel drug leads and biotechnological applications. However, logistical constraints, conservation considerations and evolving international regulations on bioprospecting in polar regions demand careful stewardship of these unique natural resources.

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Natural Products from Antarctic Marine Invertebrates publication trend

The graph below shows the total number of articles in natural products from antarctic marine invertebrates across all publications each year (not limited to Nature Index journals).

Technical terms

Secondary metabolite: A non‐essential organic compound produced by an organism, often mediating ecological interactions.

Terpenoid: A class of natural products built from isoprene units, exhibiting diverse ring structures and bioactivities.

Meroterpenoid: A hybrid natural product partially derived from terpenoid pathways and other biosynthetic origins.

Benthic: Relating to the ecological region at the lowest level of a body of water, including the sediment surface and sub‐surface layers.

Symbiont: An organism that lives in close association with another species, often contributing to mutual survival or metabolite production.

References

1. Secondary Metabolites from Polar Organisms. Marine Drugs (2017).
2. Natural Products from Antarctic Colonial Ascidians of the Genera Aplidium and Synoicum: Variability and Defensive Role. Marine Drugs (2012).
3. Marine Terpenoids from Polar Latitudes and Their Potential Applications in Biotechnology. Marine Drugs (2020).
4. Bacteria Associated with Marine Benthic Invertebrates from Polar Environments: Unexplored Frontiers for Biodiscovery?. Diversity (2018).