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Effects of Microplastics on Coral Xenia elongata: an Experimental Approach

Ecotoxicology and Environmental contamination 2025
Beatriz Carine Gazzola Prieto, Giovanna Martinelli Botan, Welber Senteio Smith

Summary

Researchers experimentally exposed coral Xenia elongata to microplastics in tank conditions to assess ingestion and tissue effects. Corals ingested microplastic particles when available and showed early signs of zooxanthellae disruption and tissue damage, contributing experimental evidence to field observations of coral-microplastic interactions.

Body Systems

Knowledge about the effects of plastic waste on the environment is relevant, an important raw material for the industry due to its low cost, high durability and easy molding, but which has had drastic and irreversible consequences for ecosystems, including aquatic ones. It is known that in the oceans this polymer is found in all shapes and sizes, and its action on marine biota has been widely described, among the findings being that corals ingest these microparticles when they confuse them with their prey, which induce the disruption of zooxanthellae leading to death, in addition to causing tissue damage and disease. Despite this, experimental research is still incipient, and this study fills the gap in the literature about what effects the microplastics (MPs) most found in the oceans can cause in non-scleractinian corals. It was found that the concentration of microplastics used in this study caused physiological effects in the soft coral Xenia elongata, affecting respiratory functions, growth, and even leading to mortality

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