Navigation Links
Plants' role in global warming re-examined

Estimates of increased plant respiration in response to higher global temperatures may be somewhat overstated as they have not taken into account plants' ability to adjust to changing conditions, according to researchers from Oak Ridge National Laboratory.

In a Perspectives paper published April 28 by Science, a team led by Tony King cites ORNL findings suggesting that about 9 percent more carbon will be stored in plants and soil with the acclimation of plants included in the model. While this amount is relatively small compared to different climate-carbon simulations performed over the years, the authors note that this acclimation phenomenon should not be ignored.

"This is carbon that might otherwise be released to the atmosphere as carbon dioxide and could further influence future climate change," said King, a researcher in ORNL's Environmental Sciences Division. "Our ability to accurately predict global change over the next several decades depends upon having a thorough understanding of multiple interacting factors, including plant respiration.

"The fact is that plants adapt to higher temperatures and their levels of respiration adjust downward."

While some previous climate-carbon simulations have included differentiation among vegetation types, none have incorporated an explicit time-dependent acclimation of plant respiration to increasing temperatures. ORNL researchers also looked at the influence of temperature acclimation at both the local ecosystem and global scales.

ORNL's study looked at the period from 1930 to 2100, with and without acclimation of leaf respiration.

"All other things being equal, as they are in our simulations, more carbon stored in plants and soils corresponds to less carbon released to the atmosphere in response to climate change, and a weaker positive feedback between carbon and climate and a weaker amplification of additional warming," the authors write.

The paper concludes by sayi ng, "There is also a need to better understand the control of respiration itself. The development, testing and adoption of a mechanistic and bio-chemical model of plant respiration are needed. To more reliably project plant respiration and climate-carbon feedbacks in a future climate, this modeling must incorporate response to temperature, including acclimation, at time scales from minutes to years."

On a global scale, plants release about 60 gigatons of carbon dioxide to the atmosphere each year as they carry out their life functions.

Other authors of the Perspectives piece were Carla Gunderson, Wilfred "Mac" Post, David Weston and Stan Wullschleger of the Environmental Sciences Division.


'"/>

Source:DOE/Oak Ridge National Laboratory


Related biology news :

1. Scientists collaborate to assess health of global environment
2. Nonlinear Dynamics announces more details of its global partnership with PerkinElmer
3. DuPonts first biologically derived polymer receives global recognition
4. Virus-host interactions at sea effect global photosynthesis
5. Hopkins AIDS experts issue warning about global efforts to provide drug therapies
6. Scientists discover global pattern of big fish diversity in open oceans
7. AIDS expert says global strategy needed to combat feminization of HIV/AIDS
8. Marine bacterium suspected to play role in global carbon and nitrogen cycles
9. Errors in the measurement of global warming corrected
10. Clean skies=faster global warming?
11. Storing carbon to combat global warming may cause other environmental problems, study suggests
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/22/2016)... PUNE, India , March 22, 2016 ... new market research report "Electronic Sensors Market for ... Fingerprint, Proximity, & Others), Application (Communication & ... and Geography - Global Forecast to 2022", ... consumer industry is expected to reach USD ...
(Date:3/18/2016)... , March 18, 2016 --> ... of Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure and ... security companies in the border security market and the continuing ... and Europe has led visiongain to ... improved success. --> defence & security companies ...
(Date:3/15/2016)... , March 15, 2016 Yissum ... , the technology-transfer company of the Hebrew University, announced ... of remote sensing technology of various human biological indicators. ... raising $2.0 million from private investors. ... based on the detection of electromagnetic emissions from sweat ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... , ... May 25, 2016 , ... ... information (RFI) issued by the Office of the National Coordinator for Health IT ... and determines if clinically relevant data were available when and where it was ...
(Date:5/24/2016)... ... May 24, 2016 , ... Cell therapies for a range ... by research at Worcester Polytechnic Institute (WPI) that yielded a newly patented method ... , The novel method, developed by WPI faculty members Raymond Page, PhD, professor ...
(Date:5/23/2016)... ... May 23, 2016 , ... PrecisionAg® Media has ... 2017 and Beyond. The paper outlines the key trends that are creating both ... “We’ve witnessed a lot of highs and lows as the precision agriculture market ...
(Date:5/23/2016)... ... May 23, 2016 , ... Foresight Institute ... announced the winners for the 2015 Foresight Institute Feynman Prizes. , These ... two categories, one for experiment and the other for theory in nanotechnology. Prof. ...
Breaking Biology Technology: