Ancient Trees In Amazon Storing Tons Of Carbon

Some Trees 1,000 Years Old

Trees in the Amazon basin grow slower and are older than scientists thought, a discovery that has implications for computer models about climate change. Up to half of all trees greater than four inches (10 centimeters) in diameter in Amazon tropical forests are more than 300 years old, the study found. Some are 1,000 years old.

jaguar conservation and deforestation in Amazon

“Little was known about the age of tropical trees, because they do not have easily identified annual growth rings,” said study team member Susan Trumbore of the University of California at Irvine. “No one had thought these tropical trees could be so old, or that they grow so slowly.”

The conclusions result from radiocarbon dating methods. The results were reported last week in the online edition of the Proceedings of the National Academy of Sciences.

The finds have implications for the role the Amazon plays in determining global carbon dioxide levels. Carbon dioxide is a greenhouse gas, acting like a blanket to trap solar energy near the surface. Trees and other plants absorb carbon dioxide and help maintain balance in the atmosphere. Deforestation, therefore, contributes to global warming and climate change in many ways.

Because the trees are old and slow-growing, the Amazon forests, which contain about a third of all carbon found in land vegetation, have less capacity to absorb atmospheric carbon than previous studies predicted, Trumbore and her colleagues said.

deforestation and climate change

“In the Central Amazon, where we found the slowest growing trees, the rates of carbon uptake are roughly half what is predicted by current global carbon cycle models,” Trumbore said. “As a result, those models—which are used by scientists to understand how carbon flows through the Earth system—may be overestimating the forests’ capacity to remove carbon dioxide from the atmosphere.”

The oldest known tree is a bristlecone pine in California. The tree is estimated to be 4,700 years old.

Rainforest News via http://www.livescience.com/3979-ancient-trees-amazon.html

reforestation and climate change solution

Sacred Seedlings is a global initiative to support forest conservation, reforestation, urban forestry, sustainable agriculture and wildlife conservation. Sustainable land management and land use are critical to the survival of entire ecosystems. Sacred Seedlings is a U.S.-based program that supports the vision of local stakeholders. We have projects ready across Africa. We seek additional projects elsewhere around the world. We also seek volunteers, sponsors and donors of cash and in-kind support. Write to Gary Chandler for more information gary@crossbow1.com

About Gary Chandler

Gary Chandler is the founder and Executive Director of Sacred Seedlings, a division of Earth Tones, Inc.

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