Navigation Links
Model predicts shifts in carbon absorption by forest canopies
Date:3/31/2010

This release is available in Spanish.

An Agricultural Research Service (ARS) scientist participated in a project to fine-tune computer models that can indicate when forest "carbon sinks" become net carbon generators instead. The results will help pinpoint the effectiveness of trees in offsetting carbon releases that contribute to higher atmospheric temperatures and global climate change.

ARS plant physiologist Erik Hamerlynck teamed up with Rutgers University biologist Karina Schafer and U.S. Forest Service colleagues Kenneth Clark and Nicholas Skowronski to calibrate the Canopy Conductance Constrained Carbon Assimilation (4C-A) model, a computer program that generates carbon balance estimates for tree canopies. Hamerlynck works at the ARS Southwest Watershed Research Center in Tucson, Ariz.

In the summer of 2006, the team measured tree sap flow and leaf-level photosynthetic gas exchange at different canopy levels in a stand of oaks and pines in the New Jersey Pine Barrens. These data were used to calibrate the 4C-A model to simulate the amount of carbon the tree canopy absorbs and releases into the atmosphere via photosynthesis and respiration.

Results from the calibrated modelwhich were within 15 percent of estimates from three other techniquesindicated that the average seasonal carbon absorption of the stand was around 1,240 grams of carbon per square meter of canopy area. The scientists then used the 4C-A model to estimate seasonal carbon exchange rates for 2007, when the same stand of trees was completely defoliated for 2 to 3 weeks during an infestation of gypsy moths. This infestation occurred when the stand was at its seasonal peak for carbon uptake.

The model showed that after the gypsy moths had finished foraging, the average carbon absorption rates for the growing season dropped 25 percent to around 940 grams
'/>"/>

Contact: Ann Perry
Ann.Perry@ars.usda.gov
301-504-1628
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

Page: 1 2

Related biology news :

1. Novel 3-D cell culture model shows selective tumor uptake of nanoparticles
2. A new kind of rat model
3. JILA finds flaw in model describing DNA elasticity
4. Smithsonian researchers develop models to assess wetland health
5. Prediction of RNA pseudoknots using heuristic modeling with mapping and sequential folding
6. Simulating kernel production influences maize model accuracy
7. MIT model could improve some drugs effectiveness
8. Model for the assembly of advanced, single-molecule-based electronic components developed at Pitt
9. Improving detection of nuclear smuggling goal of computer model of mechanical engineer
10. New chimeric mouse model for human liver diseases, drug testing
11. Study finds first-ever genetic animal model of autism
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... potential for clinical use of induced pluripotent stem ... previously been hindered by the risk of dysregulated ... ability to use etoposide treatment to halt teratoma ... disease, specifically acute myocardial infarction, is demonstrated in ... , a peer-reviewed journal from Mary Ann Liebert, ...
(Date:7/23/2014)... do mollusks, starfish, and corals have in common? ... all calcifiersorganisms that use calcium from their environment ... stability and protection. , The July issue of ... Marine Biological Laboratory, addresses the challenges faced by ... As atmospheric carbon dioxide rises, the world,s oceans ...
(Date:7/23/2014)... Massachusetts , July 23, 2014 ... in its new report, GLOBAL MARKETS AND TECHNOLOGIES ... related technologies is expected to grow to nearly $154.4 ... rate (CAGR) of 10.1%. The image, flow, and level ...      (Logo: http://photos.prnewswire.com/prnh/20140723/694805 ) , ...
Breaking Biology News(10 mins):Calcification in changing oceans explored in special issue of The Biological Bulletin 2Global Market for Sensors to Reach Nearly $154.4 Billion in 2020; Image Sensors Moving at 11.7% 2Global Market for Sensors to Reach Nearly $154.4 Billion in 2020; Image Sensors Moving at 11.7% 3
... fractures occur in the United States as a result of ... to rapid bone fusion but with limited mechanical strength often ... difficult to harvest without pain and severe morbidity. Funded by ... the Department of Chemistry, Chemical Biology and Biomedical Engineering at ...
... Washington two years ago launched an ambitious project harnessing the ... Foldit, turns one of the hardest problems in molecular biology ... people have now played a game that asks them to ... a princess. Results published Thursday (Aug. 5) in the ...
... shallow, nearshore waters, researchers from Stony Brook University ... first multi-year survey of the population of Antarctic ... near Livingston Island and discovered that nearshore waters ... waters. They also found that the nearshore waters ...
Cached Biology News:NSF funds innovative approach to biomimetic nanofiber bone regeneration 2NSF funds innovative approach to biomimetic nanofiber bone regeneration 3Gaming for a cure: Computer gamers tackle protein folding 2Gaming for a cure: Computer gamers tackle protein folding 3Gaming for a cure: Computer gamers tackle protein folding 4First nearshore survey of Antarctic krill reveals high density, stable population in shallow waters 2
(Date:7/23/2014)... (MIPT and Russian Quantum Center at Skolkovo) and ... and the Institute of Physics in Bratislava, Slovakia) ... of particles passing through an amplifier and, conversely, ... are provided in an article published in the ... , Quantum entangled particles are considered to be ...
(Date:7/23/2014)... (PRWEB) July 23, 2014 Last year, ... Systems , a leading global provider of data management ... with TrialMaster, a leading-edge system for electronic data capture ... of universal design and study execution tools added TrialMaster ... and much anticipated version of Transform for TrialMaster, is ...
(Date:7/23/2014)... DuPont Pioneer announced today that Neal Gutterson, ... Agricultural Biotechnology (ABT), effective July 21, 2014. Gutterson joins ... as president, chief executive officer and board member. , ... seed and crop protection industry to this integral role ... president of DuPont Pioneer. “I am looking forward to ...
(Date:7/23/2014)... 2014  Sofinnova Ventures, a Menlo Park ... of Sofinnova Venture Partners IX, L.P. at the hard ... initial fund target of $425 million. Sofinnova ... Consistent with recent funds, SVP IX will provide capital ... along with select investments in earlier stage opportunities. Investments ...
Breaking Biology Technology:Scientists find way to maintain quantum entanglement in amplified signals 2Scientists find way to maintain quantum entanglement in amplified signals 3Scientists find way to maintain quantum entanglement in amplified signals 4Formedix and OmniComm Systems® Partnership Strengthened with the Release of Enhanced TrialMaster® Integration for EDC Build 2Formedix and OmniComm Systems® Partnership Strengthened with the Release of Enhanced TrialMaster® Integration for EDC Build 3DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 2DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 3Sofinnova Raises $500 Million Biotech Venture Fund 2
... Hard-to-transfect Cells , Dmitriy ... Kelnar, David Brown, Ambion, Inc. , ... RNA interference (RNAi) is a powerful , ... genes. It is used routinely for gene function analysis, target , ...
... Trace amounts of ribonuclease (RNase) , ... ubiquitous in the laboratory environment--on your skin, in the , ... , open to the air--it ... or eliminate RNase contamination. However, determining which , ...
... , High Quality Custom Synthesis ... Mouse, and Rat , Genomes , ... Silencer siRNA Libraries , , ... Quality Custom RNA Synthesis by Ambion Finding a highly effective ...
Cached Biology Technology:Delivering siRNAs to Difficult Cell Types 2Delivering siRNAs to Difficult Cell Types 3Delivering siRNAs to Difficult Cell Types 4Delivering siRNAs to Difficult Cell Types 5Delivering siRNAs to Difficult Cell Types 6Delivering siRNAs to Difficult Cell Types 7Combat RNase Contamination in the Lab 2Combat RNase Contamination in the Lab 3Combat RNase Contamination in the Lab 4Combat RNase Contamination in the Lab 5IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 2IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 3IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 4IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 5IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 6IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 7IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 8IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 9IMPROVE SILENCING SUCCESS: siRNAs THAT WORK BETTER! 10
Request Info...
FITC~Bovine Serum Albumin...
... the premium quality siRNAs you need for ... be readily ordered online by providing either ... providing the sense and antisense siRNA sequences. ... Silencer Pre-designed siRNAs, which are already designed ...
, Premium quality synthesis and purification , You provide the sequence, we'll do the rest , Rigorous quality control , Your choice of purification method, amount and format , Available annealed...
Biology Products: