ScienceDaily reports A key uncertainty in climate projections is the amount of carbon emitted by thawing permafrost in the Arctic. Plant roots in soil stimulate microbial decomposition, a mechanism called the priming effect. An international research team shows that the priming effect alone can cause emission of 40 billion tonnes carbon from permafrost by 2100. […]

Plant roots increase carbon emission from permafrost soils — Natural History Wanderings