Navigation Links
Amazon trees much older than assumed, raising questions on global climate impact of region

Trees in the Amazon tropical forests are old. Really old, in fact, which comes as a surprise to a team of American and Brazilian researchers studying tree growth in the world's largest tropical region.

Using radiocarbon dating methods, the team, which includes UC Irvine's Susan Trumbore, found that up to half of all trees greater than 10 centimeters in diameter are more than 300 years old. Some of the trees, Trumbore said, are as much as 750 to 1,000 years old. Study results appear in the online early edition of the Proceedings of the National Academy of Sciences.

"Little was known about the age of tropical trees, because they do not have easily identified annual growth rings," added Trumbore, a professor of Earth system science. "No one had thought these tropical trees could be so old, or that they grow so slowly."

And for Trumbore, who studies how forests and the atmosphere exchange carbon, these discoveries can have implications for the role the Amazon plays in determining global carbon dioxide levels. Carbon dioxide is a greenhouse gas implicated in accelerated global warming and the focus of international efforts to curb its atmospheric levels.

Because their 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 have predicted. Although some of the largest trees also grow the fastest and can take up carbon quickly, the vast majority of the Amazon trees grow slowly.

"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."

As part of the Large-Scale Bi
'"/>

Source:University of California - Irvine


Page: 1 2

Related biology news :

1. Amazon symposium to address large-scale conservation
2. Amazon source of 5-year-old river breath
3. Assessing the Amazon Rivers sensitivity to deforestation
4. Woods Hole Research Center plans controlled burn in Amazon rainforest
5. Ants, not evil spirits, create devils gardens in the Amazon rainforest, study finds
6. NASA satellite data provides rapid analysis of Amazon deforestation
7. Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests
8. Why the Amazon rainforest is so rich in species
9. Satellites show Amazon parks, indigenous reserves stop forest clearing
10. Amazonian terra preta can transform poor soil into fertile
11. The Amazon in 2050: Implementing the law could save a million square kilometers of rainforest
Post Your Comments:
(Date:3/10/2015)... , March 10, 2015  NXT-ID, Inc. (NASDAQ: ... the "Company"), a biometric authentication company focused on ... Wocket™ smart wallet has been named the "Number ... Modern. Rethink Modern ( http://www.rethinkmodern.com/ ) ... for your home and lifestyle that have a unique ...
(Date:3/3/2015)... , March 3, 2015 Cryoport, ... of advanced cryogenic logistics solutions for the ... stem cells, cell lines, clinical research organizations, ... today announced the expansion of its relationship ... ("Fred Hutch") Clinical Research Division with ...
(Date:3/2/2015)... , March 2, 2015   Neurotechnology , a ... introduced the SentiGaze Software Development Kit (SDK). ... applications that use off-the-shelf webcams to track eye movements ... at a monitor. Heatmaps can be used for applications ... of online advertising. The SDK can also be used ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 2Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 3
... In the course of doing research on the mosquito-borne ... Virginia Tech researchers have discovered an inconvenient truth about ... used to detect and measure replicating viral RNA in ... using for ssqPCR is unreliable. The research appears ...
... Healthy eating, not supplements, is the best way to ... dietitian and researcher. As with vitamins, it,s best to ... taking often expensive and potentially ineffective supplements, says Gail Cresci, ... are buying stuff like crazy that is probably not even ...
... Researchers at the Michael & Susan Dell Center for ... of Public Health Austin Regional Campus found the obesity prevention ... in Texas in decreasing the prevalence of childhood obesity. ... Dell Center for Healthy Living, examined regional changes of child ...
Cached Biology News:Widely used virus assay shown unreliable when compared to other methods 2Eating right, not supplements, is best at keeping your good bacteria healthy, dietitian says 2Eating right, not supplements, is best at keeping your good bacteria healthy, dietitian says 3El Paso County serves as a model for obesity prevention, according to UT School of Public Health study 2El Paso County serves as a model for obesity prevention, according to UT School of Public Health study 3
(Date:3/26/2015)... Louisville, CO (PRWEB) March 26, 2015 ... agency has formed a strategic alliance with Designing Gig ... to their clients. , “Forging this alliance ... company. Now we can extend a comprehensive, end-to-end, ... design, development, strategy, and execution,” said Chuck Miller, president ...
(Date:3/26/2015)... ReliantHeart, Inc., an innovative supplier of advanced ... precision transit-time flow measurement solutions, are collaborating on a ... of the HeartAssist5® Left Ventricular Assist Device ... mobility and peace of mind. , The Transonic ... draw 1/6th of the power required by earlier flow ...
(Date:3/25/2015)... 2015 Agnition announced today that it ... Farmer, airing for the first time at 7:30 a.m. ... Farmer will explore the extremely important role soil microbes ... a patented Microbial Catalyst™ technology that enhances soil and ... segment will air again on April 28. , A ...
(Date:3/25/2015)... March 25, 2015 Laboratory workers ... Balances and Analytical Balances to get best-performing features ... of weighing balances from the trusted brand include: ... increase your efficiency by providing a large ... samples. Weighing modes include parts counting, percent weighing, ...
Breaking Biology Technology:The Market Element LLC and Designing Gig LLC Form Strategic Alliance 2LVAD patients to have greater mobility and peace of mind through Transonic and ReliantHeart’s True Flow collaboration for the HeartAssist5® 2LVAD patients to have greater mobility and peace of mind through Transonic and ReliantHeart’s True Flow collaboration for the HeartAssist5® 3Agnition to be Featured In Upcoming Episode of American Farmer on RFD-TV 2New Economical Top-Loading and Analytical Symmetry Balances from Cole-Parmer 2
... 3 K-V Pharmaceutical Company (NYSE:  KVa/KVb) announced today that ... ("BDO") as the Company,s independent registered accounting firm. , ... The Company and BDO will commence work immediately on ... will then follow with the review of its quarterly filings for fiscal year ...
... 3 Bill Gates , Co-Chair and Trustee of ... on the opportunity of mobile technologies to improve health outcomes in ... summit organizers announced today. The summit, organized by the Foundation for ... of Health (NIH) and the mHealth Alliance, will be held ...
... MORRISTOWN, New Jersey ... &,Allergy News Digital Network, a part of International ... launch of Product Zone on its site, http://www.skinandallergynews.com ... resource center designed to assist dermatologists, physicians, and,related ...
Cached Biology Technology:K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 2K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 3K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 4K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 5K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 6K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 7K-V Pharmaceutical Company Engages BDO USA, LLP as Independent Registered Accountants 8Bill Gates Named Keynote Speaker at the 2010 mHealth Summit 2Bill Gates Named Keynote Speaker at the 2010 mHealth Summit 3Bill Gates Named Keynote Speaker at the 2010 mHealth Summit 4Skin & Allergy News Digital Network Launches Product Zone 2Skin & Allergy News Digital Network Launches Product Zone 3Skin & Allergy News Digital Network Launches Product Zone 4Skin & Allergy News Digital Network Launches Product Zone 5
MOUSE ANTI HUMAN CYTOKERATIN 1-8...
GOAT ANTI HUMAN PSA (ISOFORM 1)...
... Synthetic peptide derived from the N-terminal region ... Specificity: Specific for the N-terminus of ... Human Dog Rat Mouse (positive controls: MDCK-II ... liver heart blood vessel and brain mossy ...
p-Raf-1 (Ser 338/Tyr 341)-R...
Biology Products: