Navigation Links
Climate warming unlikely to cause near-term extinction of Amazon trees, but threats remain
Date:12/13/2012

ncreasingly fragmented by fields and roads," Lewis said. "Species will not move as freely in today's Amazon as they did in previous warm periods, when there was no human influence. Similarly, today's climate change is extremely fast, making comparisons with the past difficult.

"With a clearer understanding of the relative risks to the Amazon forest, we conclude that direct human impacts, such as forest clearance for agriculture or mining, should remain a focus of conservation policy," Lewis said. "We also need more aggressive action to reduce greenhouse gas emissions in order to minimize the risk of drought and fire impacts to secure the future of most Amazon tree species."

Dick and his colleagues used a molecular clock approach to determine the ages of 12 widespread Amazon tree species, including the kapok and the balsa. Then they looked at climatic events that have occurred since those tree species emerged. In general, they inferred that the older the age of the tree species, the warmer the climate it has previously survived.

The researchers determined that nine of the tree species have been around for at least 2.6 million years, seven have been present for at least 5.6 million years, and three have existed in the Amazon for more than 8 million years.

"These are surprisingly old ages," Dick said. "Previous studies have suggested that a majority of Amazon tree species may have originated during the Quaternary Period, from 2.6 million years ago to the present."

Air temperatures across Amazonia in the early Pliocene Epoch (3.6 million to 5 million years ago) were similar to Intergovernmental Panel on Climate Change projections for the region in 2100 using moderate carbon-emission scenarios. Air temperatures in the late Miocene Epoch (5.3 to 11.5 million years ago) were about the same as IPCC projections for the region in 2100 using the highest carbon-emission scenarios.

The 12 tree species used in the study are br
'/>"/>

Contact: Jim Erickson
ericksn@umich.edu
734-647-1842
University of Michigan
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Warming climate unlikely to cause extinction of ancient Amazon trees, study finds
2. Mercyhurst University study probes impact of climate change on ectotherms
3. Climate - the hot topic in Doha
4. Researchers investigate impacts of climate change on rare tropical plants
5. Site-specific, long-term research expanding understanding of climate change
6. Climate models project increase in US wildfire risk
7. New study shows how climate change could affect entire forest ecosystems
8. Fish ear bones point to climate impacts
9. Rapid changes in climate dont slow some lizards
10. Maple syrup, moose, and the local impacts of climate change
11. Dartmouth research: The clocks are ticking and the climate is changing
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... Nov. 20, 2014   Atmel® Corporation (NASDAQ: ... (MCU) and touch technology solutions, today launched the industry,s ... with the widest V cc range from 1.7V ... and faster I 2 C bus communication speeds, and ... memory making them ideal for consumer, industrial, computer, and ...
(Date:11/18/2014)...   EyeLock Inc. , a market leader ... USA (Safran), a leading U.S. provider of ... partnership to offer comprehensive biometric identity solutions and ... screening and financial services markets. As ... through a nationwide network of 1,100 IdentoGO® Centers.  ...
(Date:11/10/2014)... U.S. store shelves in early 2010, and people have ... packets can be tossed into a washing machine without ... The convenience, though, has come with risks for young ... Children,s Hospital found that from 2012 through 2013, U.S. ... than 6 years of age swallowing, inhaling, or otherwise ...
Breaking Biology News(10 mins):Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3Study finds laundry detergent pods, serious poisoning risk for children 2
... power of 21st century computing to confirm an idea first ... evolve faster. Their findings appear in the October 3rd edition ... for the understanding of evolution made possible by the critical ... senior author Michael Donoghue , the G. Evelyn Hutchinson ...
... - While cellulosic biofuels derived from grasses, crop residues ... more efficient and environmentally friendly than grain-based biofuels like ... to reap these benefits, says an international group of ... in the journal Science, Purdue University agricultural ...
... traits produced by melanin pigments (for instance, dark manes ... These traits are used as signals during contests for ... the efficiency of these traits as signals depends on ... quality of the bearer. This would be only assured ...
Cached Biology News:Reproducing early and often is the key to rapid evolution in plants 2More research needed to make good on biofuel promise, experts say 2Traits produced by melanin may signal the bearer's capacity to combat free radicals 2
(Date:11/21/2014)... , Nov. 21, 2014   TRU-D SmartUVC LLC ... feature their superbug-killing UVC automated disinfection robot, TRU-D SmartUVC, at ... week from Nov. 23 to 26 at Stand 23. ... the United Kingdom,s largest infection-related event ... prevention societies to one of the leading events of its ...
(Date:11/21/2014)... November 20, 2014 The ... Chassis, Oligos, Enzymes, Cloning kits), Technology (Bioinformatics, ... (Biofuels, Pharmaceuticals, Biomaterials, Bioremediation) - Global Forecast ... market drivers, threats, opportunities, and challenges. , ... figures spread through 185 pages and in-depth ...
(Date:11/21/2014)... November 21, 2014 2014 Deep ... professional and in-depth research report on the transformer ... definition, classification, application, and industry chain structure as ... international market analysis, including China’s domestic market as ... & economic situation analysis. The report also covers ...
(Date:11/18/2014)... , Nov. 18, 2014 Cord Blood Registry® ... of the 10th Annual World Stem Cell Summit, the largest ... The 2014 World Stem Cell Summit will be held December ... Texas . The World Stem ... of lifesaving cures and therapies, convening the most prominent figures ...
Breaking Biology Technology:TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 2TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 3Synthetic Biology Market Expected to Reach $5,630.4 Million in 2018 - New Report by MarketsandMarkets 2Synthetic Biology Market Expected to Reach $5,630.4 Million in 2018 - New Report by MarketsandMarkets 3Synthetic Biology Market Expected to Reach $5,630.4 Million in 2018 - New Report by MarketsandMarkets 4International Transformer Industry - Analysis on Applications, Development & Forecasts Now Available at ReportsnReports.com 2International Transformer Industry - Analysis on Applications, Development & Forecasts Now Available at ReportsnReports.com 3Cord Blood Registry Sponsors 2014 World Stem Cell Summit 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 3
... , ROCKVILLE, Md., Sept. 4 ... that 263 regulatory professionals achieved Regulatory Affairs Certification (RAC) ... is administered by RAPS and is the only certification ... , , (Logo: http://www.newscom.com/cgi-bin/prnh/20090403/DC89286LOGO ...
... SHANGHAI, Sep. 4 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,(Nasdaq: ... Chinese firm,specializing in the manufacture, research, development, marketing ... Company,s,management team will attend the Susquehanna International Group ... The SIG 3rd Annual ...
... 4 On the day that the Man burns at the legendary ... will see a giant marijuana bud banner flying overhead. , ... Hempfest and San Francisco, features a glistening marijuana flower, along with lettering ... The controversial banner is the brainchild of Michael "Big Mike" Straumietis, ...
Cached Biology Technology:263 Regulatory Professionals Achieve RAC Certification 2263 Regulatory Professionals Achieve RAC Certification 3China-Biotics, Inc. to Attend the SIG 3rd Annual Beijing Management Summit 2Nevada Burning Man Festival Sees Giant Aerial Marijuana Bud Banner That Protests Hydroponics Hijacking 2Nevada Burning Man Festival Sees Giant Aerial Marijuana Bud Banner That Protests Hydroponics Hijacking 3
Strip Removal Tool 25/Box...
The bench-top stand comfortably holds up to 6 Finnpipette Digital single- and multichannel pipettes. The crossbars are made of a grippy material to keep the pipettes firmly in place. Individual shelf...
... determined by Biuret Physical form: Solution in ... 7.6, 1 mM MgCl 2 and ... Definition: One unit will hydrolyze 1 μmole ... 9.8 at 37 C. • Concentration: ≥ ...
... a wide variety of solvent vapors that can contaminate ... (GCF400) allows for the collection of liquid into a ... minimizes waiting period., Ultra low -104 o ... , Digital Display of temperature ...
Biology Products: