Another Reason to Love Big, Old Trees

Large, old trees are better at “sequestering” carbon than previously thought, in some cases absorbing as much CO2 as is in a smaller tree each year, according to a study published last week in the journal Nature.

“This finding contradicts the usual assumption that tree growth eventually declines as trees get older and bigger,” stated Nate Stephenson, lead author of the study and a forest ecologist with the U.S. Geological Survey. Rather, mass growth rate increases continuously.

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“It also means that big, old trees are better at absorbing carbon from the atmosphere than has been commonly assumed,” Stephenson said, and they play an important role in mitigating human-caused CO2 emissions.