Metal ecotoxicity in sea anemones: Accumulation, effects, and knowledge gaps

Area of Science:

• Marine ecotoxicology
• Environmental science
• Pollution biology

Background:

• Metals are persistent pollutants in marine environments.
• Sea anemones are susceptible to metal toxicity.
• Climate change exacerbates pollutant effects.

Purpose of the Study:

• To synthesize 50 years of research on metal accumulation and effects in sea anemones.
• To assess metal interactions with climate change stressors.
• To identify knowledge gaps in metal ecotoxicology for sea anemones.

Main Methods:

• Literature review of field and laboratory studies.
• Analysis of metal uptake, tissue distribution, and biological effects.
• Inclusion of studies on climate change interactions (salinity, pH).

Main Results:

• Sea anemones bioaccumulate metals, particularly iron and barium, in their pedal disk.
• Symbionts uptake essential metals (Cu, Fe, Mn) for biological functions.
• Metals cause molecular to behavioral changes, amplified by climate stressors.
• Exaiptasia pallida identified as a model organism for metal ecotoxicology.

Conclusions:

• Sea anemones are valuable indicators of marine metal contamination.
• Further research is needed to understand metal ecotoxicity mechanisms.
• Combined stressors pose a significant threat to marine ecosystems.