Total and Potentially Active Bacterial Communities Entrapped in a Late Glacial Through Holocene Ice Core From Scarisoara Ice Cave, Romania.

Meanwhile, Actinobacteria relative abundance showed an increasing trend during the last 6,000 years up to 72.8% (SC6K), followed by a decline up to 24.8% in older strata.

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The relative abundance of Proteobacteria showed a decreasing trend over the last 7 millennia from 48.7 to 12.7%, followed by a slight increase up to 40.3% in ice strata older than 7,000 years ( Figure 5A ).

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