HOME >> BIOLOGY >> NEWS
Changes in North American land use have had major impact on global environment

The reforestation of former farmland over the last century has played an important role in reducing the accumulation of greenhouse gasses in the atmosphere, according to Princeton scientists.

The scientists, publishing in the Nov. 10 issue of Science, reported that changes in land use have been critical in allowing North American forests to regrow and soak up large amounts of carbon dioxide. Previous studies had suggested that other factors, such as the fertilizing effects of carbon dioxide, were spurring forests to absorb more carbon dioxide.

"Changes in the way we manage our land have had a real impact on the global environment," said the paper's lead author, John Caspersen.

The finding makes it clear, however, that this benefit will not continue indefinitely, because the regrowth of forests will slow as they mature. The results could have important implications for policymakers wrestling with the question of how to reduce the accumulation of carbon dioxide in the atmosphere.

Scientists have been trying for more than a decade to track the fate of carbon dioxide pumped into the atmosphere as a result of burning fossil fuels. Early studies showed that despite six billion tons of the gas emitted each year, only three or four billion tons accumulate in the atmosphere. Landmark studies from Princeton and elsewhere showed that trees and other land plants, which absorb carbon dioxide during photosynthesis, were taking up a large part of the "missing" carbon. Then, in 1996, a Princeton-led group reported that much of this absorption was happening in the United States and neighboring countries - a phenomenon called the "North American carbon sink."

Still, it was not clear what was causing North America to absorb so much carbon. Some evidence suggested that carbon dioxide itself would stimulate plant growth, thus causing more carbon dioxide uptake. Increased nitrogen pollution and global warming also could stimulate plant growth. Studies publis
'"/>

Contact: Steven Schultz
sschultz@princeton.edu
609-258-5729
Princeton University
9-Nov-2000


Page: 1 2

Related biology news :

1. Changes to insect-seeking calls of horseshoe bats may drive new species formation
2. Changes in shape of single protein plays key role in the spread of cancer cells
3. Changes in arctic ice affect life around the globe
4. Changes in jet stream, storm tracks, linked to prairie drought patterns, study finds
5. Changes in prevalence of mutations associated with HIV treatment failure
6. Changes in rainfall patterns spur plant growth, carbon absorption across U.S.
7. Changes in agricultural practices help clean up Lake Erie
8. Changes in Lake Erie fish population suggest lakes recovery
9. Changes in Australian ecosystems tied to arrival of exotic animals
10. Changes in diet related to prevalence of asthma and allergies
11. Changes for chickens? New hybrid corn helps reduce phosphorus in poultry litter, UD scientists report

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/7/2017)... , February 7, 2017 ... Global Solutions Corporation [OTC: IDGS], ("Ipsidy" or the "Company") ... electronic transaction processing services, is pleased to announce the ... Company. Effective January 31, 2017, Philip ... of Directors, CEO and President.  An experienced payment industry ...
(Date:2/2/2017)...   TapImmune, Inc. (NASDAQ: ... the development of innovative peptide and gene-based immunotherapeutics ... metastatic disease, announced today it has successfully completed ... second clinical lot of TPIV 200, the company,s ... manufactured vaccine product will be used to supply ...
(Date:1/31/2017)... CAMBRIDGE, Mass. , Jan. 31, 2017 /PRNewswire-USNewswire/ ... develop novel therapies for the treatment of bacterial ... generation set of antibacterial candidates from Pro Bono ... the increased prevalence of multi-drug resistant forms of ... by Cantab Anti Infectives Ltd, a PBB group ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... ... 23, 2017 , ... Brain Sentinel, Inc. has received US ... System, the Brain Sentinel® Seizure Monitoring and Alerting System. The adjunctive seizure monitoring ... of rest. A lightweight, non-invasive monitor is placed on the belly of the ...
(Date:2/23/2017)... LOS ANGELES , Feb. 23, 2017  Capricor Therapeutics, ... cardiac and other medical conditions, today announced that Linda Marbán, ... at two upcoming investor conferences: Cowen ... 2017 at 10:00 am ET Boston, MA ... 14, 2017 at 9:00 am PT (12:00 pm ET) ...
(Date:2/22/2017)... ... February 22, 2017 , ... Kernel , ... Research Systems, LLC (KRS) clinical development program. KRS is a neurotechnology spin-out ... research and clinical applications. The terms of the transaction were not disclosed. ...
(Date:2/22/2017)... ... February 22, 2017 , ... ProMIS ... precision treatments for neurodegenerative diseases, today announced it has issued a scientific white ... is one of a series of commentaries from ProMIS’s scientific team offering insight ...
Breaking Biology Technology:
Cached News: