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:4/24/2014)... in Munich have identified the structural features that ... viral and endogenous RNAs in living cells. , ... cellular metabolism and hijack cellular resources for the ... on viral RNA molecules that are delivered directly ... newly synthesized in the host cell, and provide ...
(Date:4/24/2014)... study of animal intelligence to-date finds that animals with bigger ... week in the journal Proceedings of the National Academy ... history of research aimed at understanding the animal mind. Specifically, ... and use tools, read social cues, or even understand basic ... of animal intelligence have focused on only one or a ...
(Date:4/24/2014)... could be improved with new insights into the make-up ... studying the Amazon Basin have revealed unprecedented detail of ... region by comparing satellite maps with hundreds of field ... assess more accurately the amount of carbon each tree ... offset schemes, in which trees are given a cash ...
Breaking Biology News(10 mins):Viral infections: Identifying the tell-tale patterns 2Viral infections: Identifying the tell-tale patterns 3Animals with bigger brains, broader diets have better self control 2Animals with bigger brains, broader diets have better self control 3Amazon rainforest survey could improve carbon offset schemes 2
... Ill. The overuse of nitrogen fertilizers in agriculture ... An international team of scientists aims to lessen ... similar plants boost their nitrogen production, even in areas ... Center of Plant Genomics and Biotechnology at the Technical ...
... fires and urban and agricultural areas in California is ... to a recent study published in the journal ... ecologist from the U.S. Forest Service,s Pacific Southwest Research ... at Devils Postpile National Monument in the eastern Sierra ...
... A potential new way to fight obesity-related illness has ... at the Case Western Reserve University School of Medicine. ... Cleveland Clinic Foundation and Cornell University, discovered the essential ... brought on by obesity. "The implications of our findings ...
Cached Biology News:Strengthening legumes to tackle fertilizer pollution 2Air pollution diminishing air quality at Devils Postpile National Monument 2Vitamin E identified as potential weapon against obesity 2Vitamin E identified as potential weapon against obesity 3
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider of ... regulatory, business, and media events in the United States ... former associate Virginia Cox , JD, is returning to the ... Virginia Cox re-joins 3D after more than two years of ...
(Date:1/14/2014)... , Jan. 14, 2014 The largest ... research medicinal plants and therapeutic derivatives thereof has ... professionals, and researchers about the challenges of adulterated ... http://photos.prnewswire.com/prnh/20100430/DC95601LOGO ) The Society for ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 In recent ... motives and methods in product development and promotion has ... industry. This mistrust, fueled by concerns about the insidious ... by reports of spectacular fines to the world’s biggest ...
(Date:1/14/2014)... Ontario , Jan. 14, 2014   Kinaxis ®, provider ... SCM ) and sales and operations planning ( S&OP ) ... Biomanufacturing Summit , which will be held at the ... the conference, join Kinaxis customer Elisabeth Kaszas , Director ...
Breaking Biology Technology:Former FDA Associate Commissioner Returns To 3D Communications 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... a bill Friday designed to promote capital investment and ... loans. The legislation, SB 261 , was only ... Ted Kanavas, R-Brookfield, to hit the Assembly floor this ... the Wisconsin Capital Companies Program, (WISCAP) is a revised ...
... MILWAUKEE - The benefits of switching to voice over ... meeting at the Italian Community Center in Milwaukee. Nearly ... their experiences with VoIP. , ,Clear reasons for switching ... and Pat Scheckel, VoIP practice director for Berbee Information ...
... MADISON - Inacom Education , announced today that it ... of Microsoft Technology Trainers United Training. United Training ... Technology training centers from around the country who have met ... membership. , , In order to qualify for ...
Cached Biology Technology:Wisconsin Assembly passes capital investment bill, revised CAPCO program not presented 2Wisconsin Assembly passes capital investment bill, revised CAPCO program not presented 3VoIP: Are we there yet? 2
Mouse monoclonal [TU-20] to beta III Tubulin (FITC) ( Abpromise for all tested applications). entrezGeneID: 10381 SwissProtID: Q13509...
Phospho-FKHR (Thr24)/FKHRL1 (Thr32) Antibody...
Mouse anti-Insulin-Like-3 Class: Antibody Product Group: Adipokine and Obesity related...
... BRF2 Immunogen Synthetic peptide: QAARQAATSVPNPP, corresponding ... BRF2. Reactivity / Specificity Cross-reacts with ... Background Information BRF2 is one of the ... factor complex required for transcription of genes with ...
Biology Products: