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:8/26/2014)... St. Louis have developed algorithms to identify weak spots ... breaking. The technology, which needs to be refined before ... pinpoint minor strains and tiny injuries in the body,s ... is available online Aug. 27 in the Journal ... at the nexus of the physical and life sciences. ...
(Date:8/26/2014)... of Warwick have provided the first evidence that ... linked to early signs of dementia. , Published ... that the absence of the protein MK2/3 promotes ... nervous system. These changes were shown to have ... including restricted learning and memory formation capabilities. , ...
(Date:8/26/2014)... In recent years, increasing pressure from policymakers, consumers, ... targets that go beyond reducing the pollutants they ... and lakes. Today companies must also assess environmental ... the mining of primary materials to the use ... has given rise to the discipline known as ...
Breaking Biology News(10 mins):New technology may identify tiny strains in body tissues before injuries occur 2New technology may identify tiny strains in body tissues before injuries occur 3Lack of naturally occuring protein linked to dementia 2Yale journal explores advances in sustainable manufacturing 2
... 2011 -- Research presented today at the 31st Annual meeting ... Meeting has found that three proteins known as XIAP, BID, ... progesterone treatments in the prevention of preterm labor. They ... The proteins prevent preterm birth by hindering ...
... Aethlon Medical, Inc. (OTC Bulletin Board: ... to address infectious disease and cancer, announced today that ... the 4th Congress of the International Society for Hemodialysis ... "The Treatment of HCV with Affinity Plasmapheresis." The conference ...
... today at the 31st Annual meeting of the Society for ... three proteins known as XIAP, BID, and Bcl-2 are responsible ... prevention of preterm labor. They may also play an ... proteins prevent preterm birth by hindering apoptosis the normal, ...
Cached Biology News:New research helps explain how progesterone prevents preterm birth 2Aethlon Medical to Present at 4th Congress of the International Society for Hemodialysis in India 2Aethlon Medical to Present at 4th Congress of the International Society for Hemodialysis in India 3Aethlon Medical to Present at 4th Congress of the International Society for Hemodialysis in India 4Aethlon Medical to Present at 4th Congress of the International Society for Hemodialysis in India 5New research helps explain how progesterone preventspreterm birth 2
(Date:8/27/2014)... 27, 2014 Guggenheim Securities, the investment banking ... the hiring of veteran equity analyst Charles "Tony" Butler ... Butler will focus on the biotech/biopharma sector. ... of experience and a broad network of relationships in ... Director and Head of Equities at Guggenheim Securities. "His ...
(Date:8/27/2014)... CO (PRWEB) August 27, 2014 Flagship ... analysis services to the pharmaceutical and medical device ... expansion. The fast growing company has consolidated its ... Aurora and Boulder to Westminster, CO, just north of ... Histology Lab, 7575 W. 103rd Ave., Suite 100, Westminster, ...
(Date:8/27/2014)... , Aug. 27, 2014 Research and ... Stable Isotope Ratio Mass Spectrometer Industry Report 2014" ... Stable Isotope Ratio Mass Spectrometer Industry Report 2014 is ... of the global isotope ratio mass spectrometer industry. ... industry including definitions, classifications, applications and industry chain structure. ...
(Date:8/27/2014)... , Aug. 27, 2014 Tris Pharma, a ... technologies, today announced that it has been selected as ... Industry Association,s 2014 Awards for Excellence competition ... an independent panel of judges from SCORE (Counselors to ... winners will be honored at a gala event to ...
Breaking Biology Technology:Guggenheim Securities Hires Analyst Charles "Tony" Butler to Expand Healthcare Coverage 2Flagship Biosciences Announces Relocation and Expansion 2Global Stable Isotope Ratio Mass Spectrometer Industry Report 2014 2Tris Pharma Selected as an award winner in the New Jersey Business & Industry Association's 2014 Awards for Excellence 2
... 7 ThermoGenesis,Corp. (Nasdaq: KOOL ), a leading ... cells, announced today that it will be,participating in the ... 10, 2008., The Company,s presentation by Dr. William ... Standard Time (11:50 am, Pacific Standard,Time), and will be ...
... cubes and spheres move aside. Tiny gold stars, smaller ... for new approaches to medical diagnoses or testing for environmental ... wide spectrum of sciences, a new study by Duke University ... stars may shine above all the rest for certain applications. ...
... Upon a Proven Class of Drugs With Greater Tumor ... (Nasdaq: ONXX ) today announced that it has,in-licensed ... Limited based in the United Kingdom. Under the terms ... BGC 945 and all of its,related patents. Onyx will ...
Cached Biology Technology:ThermoGenesis Presentation at Rodman & Renshaw Conference 2Gold nanostar shape of the future 2Gold nanostar shape of the future 3Onyx Pharmaceuticals Licenses Rights to Novel Targeted Oncology Agent From BTG International 2Onyx Pharmaceuticals Licenses Rights to Novel Targeted Oncology Agent From BTG International 3
... The new D-LUX Detection Platform combines ... provide the most sensitive, specific, and ... Invitrogens D-LUX Detection Platform offers exceptional ... to TaqMan probes, high signal/background ratio, ...
...
Request Info...
... Blood is aseptically collected via cardiac puncture ... Zealand White, mixed sex). It is then centrifuged ... pooled, sterile filtered and bottled at 4C then ... IF YOU HAVE ALWAYS USED PEL-FREEZ COMPLEMENT, YOU ...
Biology Products: