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Old-growth forests store a lot more carbon than managed forests

A man digging a pit with a shovel in a green forest patch
The researchers dug soil pits in order to measure the carbon storage in soil. Photo: Johanna Asch

Swedish old-growth forests store 83 percent more carbon than managed forests, according to a new study from Lund University. The difference is substantially larger than previous estimates and is mainly due to large carbon stocks in the soil.

The study, published in the scientific journal Science, is the most comprehensive mapping of how much carbon is stored in Swedish old-growth forests to date. The results show that old-growth forests store 78–89 per cent more carbon than managed forests in living trees, dead wood, and in the soil down to a depth of 60 centimetres.

“The most surprising result is the large amounts of carbon stored in the soil of old-growth forests. It is the same amount as all the carbon in managed forests - trees, dead wood, and soil, combined,” says Anders Ahlström, researcher at the Department of Environmental and Earth Sciences at Lund University wo also recieves funding from BECC.

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The full text is available at the following link: 
Old-growth forests store a lot more carbon than managed forests | Department of Earth and Environmental Sciences

Link to the article in Science:
Higher carbon storage in primary than secondary boreal forests in Sweden