Tag Archives: past hydrogen

Atmospheric H2 energetic fertilization to soil microorganisms in a forest ecosystem

Poster presented at the Ecology of Soil Microorganisms conference in Prague, 2011:

Ecology of Soil Microorganisms poster

Ecology of Soil Microorganisms

TopicSoil microorganisms dominate the fate of atmospheric molecular hydrogen (H2 ) and comprise an estimated 75-80% of its global sink. Recent work has linked atmospheric H2 uptake to a novel high-affinity [NiFe]-hydrogenase expressed in active Streptomyces sp. cells [1], and is perhaps not driven by abiotic hydrogenases as was previously thought. Consequently, atmospheric hydrogen may be a 60-85 Tg yr−1 energetic supplement to microbes in Earth’s uppermost soil horizon. Continue reading

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