Heavy-metal stress shapes habitat-specific microbial survival strategies in estuarine environments.

Heavy-metal pollution drives habitat-specific microbial survival strategies, with sediment communities showing the highest diversity and metal resistance in estuarine environments.

• Why it matters: Understanding microbial adaptations to heavy metals is crucial for managing pollution impacts on estuarine ecosystems, which are vital for environmental health and biogeochemical cycling.
• What they did: The study used high-throughput sequencing and metagenome-assembled genomes from three estuaries to analyze bacterial and fungal community composition, diversity, and functional genes related to metal resistance and metabolism.
• The result: Findings reveal distinct survival strategies: sediment microbes favor sulfate reduction for metal immobilization, while free-living and particle-attached communities rely on efflux and oxidative stress defenses, highlighting ecosystem resilience and informing pollution mitigation efforts.