e! Science News reports on a paper on soil carbon published by researchers at the University of Michigan.
If you're a land manager trying to assess the potential of forests to offset carbon emissions and climate change by soaking up atmospheric carbon and storing it, what's going on beneath the surface is critical. But while scientists can precisely measure and predict the amount of above-ground carbon accumulating in a forest, the details of soil-carbon accounting have been a bit fuzzy.
Two University of Michigan researchers and their colleagues helped to plug that knowledge gap by analyzing changes in soil carbon that occurred when trees became established on different types of nonforested soils across the United States. U-M ecologist Luke Nave and his colleagues found that, in general, growing trees on formerly nonforested land increases soil carbon. Previous studies have been equivocal about the effects of so-called afforestation on soil carbon levels.
"Collectively, these results demonstrate that planting trees or allowing them to establish naturally on nonforested lands has a significant, positive effect on the amount of carbon held in soils," said Nave, an assistant research scientist at the U-M Biological Station and in the Department of Ecology and Evolutionary Biology.
Read more here.