The microbial constraint hidden inside thawing permafrost
WHAT THE EVIDENCE SAYS
Four permafrost types incubated for 389 days produced 20–60% more CO2 after addition of a multifunctional microbial community. Native active-layer inocula worked inconsistently. In one anoxic palsa-soil experiment, inoculation increased methane nearly fivefold and the six-month CO2-equivalent by 35%.
WHY IT MATTERS / OUR READ
Climate-feedback models need microbial colonization, community assembly and oxygen regime, not just temperature and carbon stocks. This is evidence about mechanisms, not an inoculation prescription.
CAVEATS / UNCERTAINTY
These were laboratory incubations with specified source soils, not field fluxes. The anoxic methane result cannot be extrapolated across all permafrost.
SOURCE
Nature Communications · primary experiment
View original evidence ↗
What moves into newly thawed soil may change greenhouse-gas emissions as much as what was frozen there.
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