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:7/21/2014)... areas across Riau province on Sunday, July 20, indicating ... decline in rainfall. The number of detected hotspots ... been reported one day prior, which had reached only ... regencies and municipalities, most of which were in northern ... creates could potentially spread via winds to Malaysia and ...
(Date:7/21/2014)... CHAMPAIGN, Ill. A new study in mice reveals ... muscle after resistance exercise. , By injecting MSCs ... eccentric exercise (similar to the lengthening contractions performed during ... damage), researchers were able to increase the rate of ... muscles in the exercising mice. , The findings, ...
(Date:7/21/2014)... yourself full of high-fat foods cause you to lose ... Florida State University neuroscientists says so, and it has ... could impact a whole range of human functions that ... obesity. , "This opens up a lot of possibilities ... Nicolas Thiebaud, who led the study examining how high-fat ...
Breaking Biology News(10 mins):Stem cells aid muscle repair and strengthening after resistance exercise 2New research links bad diet to loss of smell 2
... trillions of cells, all derived from a single cell, or zygote, ... single cell contains all the genetic information needed to develop into ... new cell as it divides into the many diverse types of ... If each cell is genetically identical, however, how does ...
... make sure their children drink milk and eat other calcium-rich foods ... make sure their kids eat salmon, almonds and other foods high ... in bone health, according to a study to be presented Sunday, ... Washington, DC. "Lots of nutrients are key for children ...
... and/or improve the quality of life for many cancer patients. ... inducing damage to DNA. The public has an opportunity ... used anticancer drugs and how laboratory research may lead to ... Yinsheng Wang , a professor of chemistry at ...
Cached Biology News:Divide and define: Clues to understanding how stem cells produce different kinds of cells 2Divide and define: Clues to understanding how stem cells produce different kinds of cells 3Magnesium may be as important to kids' bone health as calcium 2How do anticancer drugs work? 2How do anticancer drugs work? 3
(Date:7/22/2014)... , July 22, 2014  United Therapeutics ... that it will release its second quarter 2014 ... 29, 2014. United Therapeutics will host ... at 9:00 a.m. Eastern Time.  The teleconference is ... 1-970-315-0533.  A rebroadcast of the teleconference will be ...
(Date:7/22/2014)... July 22, 2014 Dr. Williams says, ... who have recognized that the greatest health care system ... too often needlessly deadly while trying to serve the ... quasi-experts seeking to transform an enormous system that none ... Williams, in his continuing series of Open Letters ( ...
(Date:7/21/2014)... yield so far is small, but chemists at the ... substitution process to make a precursor to transparent thin ... energy devices. , A paper describing the approach is ... of the journal Inorganic Chemistry , which draws ... nuclear chemistry fields. The paper was chosen by the ...
(Date:7/20/2014)... NY (PRWEB) July 20, 2014 ... custom quartz glass optics, and spectrophotometer calibration ... these years, NSG has released many products that ... successful product has been their solid-state calibration standards. ... liquid standards since their release in 2008. ...
Breaking Biology Technology:Dr. Ira Williams Asks What’s Wrong With Jonathan Bush’s Book, Where Does It Hurt? 2Oregon chemists eye improved thin films with metal substitution 2How NSG Precision Cells Spectrophotometer Calibration Standards Makes NIR Work Easier 2How NSG Precision Cells Spectrophotometer Calibration Standards Makes NIR Work Easier 3
... AVIV, Israel, October 15 ,Simbionix USA Corporation is ... round of growth capital financing led by River ... Partners and other existing,shareholders, as well as Western ... The investment will enable Simbionix to,accelerate the already ...
... PURE Bioscience (Nasdaq:,PURE), creators of the patented ... the fiscal year ended July 31, 2008 of,$1,487,500, ... in the,prior fiscal year. The Company reported a ... per share, compared with a loss of,$(4,654,900), or ...
... Calif., Oct. 15 SuperGen, Inc.,(Nasdaq: SUPG ... and,development of novel cancer therapies, today announced the ... EORTC-NCI-AACR Symposium on "Molecular,Targets and Cancer Therapeutics" on ... will review clinical and non-clinical advances,in the following ...
Cached Biology Technology:Simbionix Raises Largest Amount in Company's History in Venture Capital to Accelerate Growth 2Simbionix Raises Largest Amount in Company's History in Venture Capital to Accelerate Growth 3PURE Bioscience Reports Fourth Quarter and Year End Results 2PURE Bioscience Reports Fourth Quarter and Year End Results 3PURE Bioscience Reports Fourth Quarter and Year End Results 4PURE Bioscience Reports Fourth Quarter and Year End Results 5PURE Bioscience Reports Fourth Quarter and Year End Results 6PURE Bioscience Reports Fourth Quarter and Year End Results 7SuperGen to Present Data at EORTC-NCI-AACR 2
Immunogen: Synthetic peptide (aa sequence is considered to be commercially sensitive) Storage: -20 C, Avoid Freeze/Thaw Cycles...
... Immunogen: Recombinant human IDO (Indoleamine-pyrrol ... the ~44 kDa human IDO ... control: IFN-Gamma-stimmulated Human peripheral blood ... reactivity with mouse and rat ...
...
Anti-ZFP-38/RU49 Family: Zinc Finger Peptide Sequence: SVKVEDKDFPSTCSKK...
Biology Products: