Scaling laws link conserved gene-abundance distributions to adaptive expression in diatom communities worldwide.

Transcript abundance in diatom communities increases nonlinearly with transcript richness, and this scaling is captured by a stochastic model linking gene abundance dynamics to gene expression across Tara Oceans samples.

• Why it matters: Gene-abundance structure stays statistically similar across environments, but gene expression varies geographically; the study addresses how diatom communities maintain stable ecosystem function despite transcriptional variability.
• What they did: Metagenomic and metatranscriptomic data from diatom communities in the Tara Oceans global expedition were analyzed to derive global gene-abundance distributions and predictable scaling laws, using a stochastic model linking gene abundance dynamics to gene expression.
• The result: Colder waters show higher transcriptional activity and warmer regions show more selective gene usage; temperature suffices to predict transcriptional patterns from genetic composition, implying diatom communities balance high expression of core genes with functional diversity.