From sediment to coral symbionts: persistent spatial structure across reef microbiomes

Reef microbiomes exhibit persistent spatial structure with sediment microbes changing rapidly over weeks, while coral symbionts remain stable across time and space.

• Why it matters: Understanding how microbial communities are shaped across different reef components is crucial for predicting reef resilience and health, especially as environmental conditions fluctuate.
• What they did: The study sampled sediments and coral colonies at two reefs over three weeks, analyzing microbial and Symbiodiniaceae communities, and expanded to multiple sites to assess host genetic influence.
• The result: Sediment microbial communities varied strongly between reefs and over time, whereas coral-associated Symbiodiniaceae remained stable through time but differed across locations, highlighting spatial factors as key drivers.