USGS Scientists Uproot Long-held Beliefs about Trees

February 4, 2014
By
 A long-held belief about old trees has been uprooted. A new study from the U.S. Geological Survey finds that trees' growth rates do not slow as they get older and larger – instead, they keep putting on mass along with their years. Photo credit: Deborah C. Smith

A long-held belief about old trees has been uprooted. A new study from the U.S. Geological Survey finds that trees’ growth rates do not slow as they get older and larger – instead, they keep putting on mass along with their years. Photo credit: Deborah C. Smith

A long-held belief about old trees has been uprooted. A recent study by the U.S. Geological Survey finds that trees’ growth rates do not slow as they get older and larger. Instead, they keep putting on mass along with their years.

According to the study’s lead author, Nate Stephenson, a forest ecologist with the USGS, if people did the same, we’d weigh well over a ton by retirement. For trees, the finding changes what we know about how they store carbon, and has implications for forest management.

“About for every pound of mass a tree puts on, it’s absorbing and sequestering about a half-pound of carbon,” he said, and added that old, large trees are better at storing and absorbing carbon from the atmosphere.

Stephenson pointed out that the rapid absorption rates mean old trees are the star players within forest carbon dynamics. And that’s also of interest in terms of the changing climate.

“Change is going to happen no matter what, and if we want to project how forests are going to respond to that, we really have to get some of these key pieces right.”

Trees around the world were studied for the report, more than 600,000 of them from 400 species, on six continents.

 

Listen Live

Upcoming Events

Sep
4
Fri
6:00 pm “All in the Canal!” Block Party @ Lane's End
“All in the Canal!” Block Party @ Lane's End
Sep 4 @ 6:00 pm – 8:00 pm
A block party will be held on Friday, September 4 from 6:00 pm – 8:00 pm at Lane’s End in Metamora. Food, games, and prizes are all FREE for the residents of Franklin County! Explore Challenge sponsored by FCN Bank. Music by Kelly and Emily Ann Thompson. Keep your Digital Scorecard at IndianaHumanities.org/ALL-IN.
7:00 pm Military Appreciation Night @ Milan High School
Military Appreciation Night @ Milan High School
Sep 4 @ 7:00 pm
Friday night, September 4, will be military appreciation night when the Indians take on the Tigers. All active military and veterans will be admitted to the game free of charge. Donations at the game will be accepted to help with the Wounded Warrior Project.
Sep
5
Sat
11:00 am Annual Classic Cruise-In
Annual Classic Cruise-In
Sep 5 @ 11:00 am – 2:00 pm
Ripley Crossing presents their Annual Classic Cruise-In on September 5 from 11 am – 2 pm at 1200 Whitlach Way in Milan. Food & drinks, live music, vendors, and door prizes will be featured and available. Free will offering will be accepted for registration the day of the event. Trophies will be awarded for 1st, 2nd, & 3rd place!

View Calendar