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

0

GOOD

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:5/18/2013)... An increasing number of U.S. children are experiencing ... to research presented at Digestive Disease Week (DDW). ... at the Cleveland Clinic Children,s Hospital found that ... breath compared to their lean counterparts. The pattern ... can be correlated to potential complications associated with ...
(Date:5/17/2013)... white noise of the South, but the night belongs to ... hangs heavy from the humidity and the sounds of wildlife. ... of frogs, toads and salamanders, is the center of amphibian ... are the auditorium for their symphonic choruses, the scientists of ... ARMI, have front-row seats. , Amphibians, which rely ...
(Date:5/17/2013)... will celebrate the science and technology of the ... during the inaugural Atlanta Science Festival, March 22-29, ... museums, corporations, K-12 schools and universities, the festival ... children and adults at venues across the city. ... The annual Atlanta Science Festival is a collaboration ...
Breaking Biology News(10 mins):New research identifies risks, interventions for children's GI health 2New research identifies risks, interventions for children's GI health 3Front-row seats to climate change 2Front-row seats to climate change 3Front-row seats to climate change 4First Atlanta Science Festival set for 2014 2
... around the world are breathing a sigh of ... of being harvested for their natural disease-fighting substances. ... which lives symbiotically inside the sea squirt, actually ... day be used in cancer treatment. , Despite ...
... of Iowa Biological Sciences Professor Daniel F. Eberl and his ... deafness in fruit flies that may shed light on deafness ... the Usher 1B Syndrome in Humans, Lead to Deafness in ... of the journal Current Biology. , Eberl says their recent ...
... be fused with large, protein-based drugs such as granulocyte ... that is capable of surviving the journey through the ... into the bloodstream to be used by the body, ... School of Pharmacy. , This technology may allow for ...
Cached Biology News:UI researcher studies deafness in fruit flies, humans 2Recombinant DNA technology may enable oral, rather than injectable, delivery of protein drugs 2Recombinant DNA technology may enable oral, rather than injectable, delivery of protein drugs 3
(Date:5/21/2013)... Bed bugs have become so widespread in ... many turn to chemical-based pesticides for help to completely get ... risks those solutions present, the company advised the public to ... , According to My Cleaning Products, chemical-based pesticides are ... be. It shared that the pests have already developed immunity ...
(Date:5/21/2013)... Ontario (PRWEB) May 21, 2013 ... scientists of the ITN to design the study, ... of two key clinical models used in the ... (EEC) and Nasal Allergen Challenge (NAC) models. Although ... by numerous publications, to date no direct comparison ...
(Date:5/21/2013)... SoundConnect is pleased to announce the release ... in Canada. Lync is the next generation of ... and organizations to collaborate and communicate much more easily ... the United States. With the progressive rollout of Lync ... Canada, SoundConnect now offers a complete Microsoft Lync solution ...
(Date:5/21/2013)... CA (PRWEB) May 21, 2013 Clinovo's ... is an 8-week training program starting on June 11th, ... help clinical trial professionals reach the next step in ... Dentons Offices in Palo Alto, and streamed online. , ... of award-winning papers, Clinovo's new “CDISC Standards: Theory and ...
Breaking Biology Technology:New Guide to Kill Bed Bugs Published by My Cleaning Products, Company Enumerates Non-Toxic Means to Clear the Pests 2New Guide to Kill Bed Bugs Published by My Cleaning Products, Company Enumerates Non-Toxic Means to Clear the Pests 3Inflamax Research selected by the Immune Tolerance Network and the National Institutes of Health to conduct a landmark clinical study on the underlying mechanisms of allergic inflammation. 2SoundConnect Announces Microsoft Lync Release in Canada 2SoundConnect Announces Microsoft Lync Release in Canada 3Clinovo Launches TechTrainings on CDISC Standards 2
... , , SAO PAULO , Feb. ... to postpone a decision to reduce Brazil,s ,ethanol import duty from ... to be announced, but not for its impact to take effect once ... it describes as little more than a "bureaucratic" delay. , ...
... , SAN FRANCISCO , ... a leader in Integrated Voice Response (IVR)/Integrated Web Response (IWR) ... allows users to design and deploy clinical trial Integrated Response ... of clinical trials. This time and cost savings stems from ...
... ... nematodes as the Divergence and National Corn Growers Association continues collaboration. , ... (PRWEB) February 9, 2010 -- ... Research (SBIR) grants totaling $500,000, along with renewed funding from the National Corn Growers ...
Cached Biology Technology:Brazilian Sugarcane Industry Association Stresses Need for Brazil's Government to Announce Ethanol Import Tariff Cut as Soon as Possible 2Brazilian Sugarcane Industry Association Stresses Need for Brazil's Government to Announce Ethanol Import Tariff Cut as Soon as Possible 3endpoint Saves Money and Time for Medical Research Teams Through PULSE 2endpoint Saves Money and Time for Medical Research Teams Through PULSE 3New Funding Validates Importance of Divergence's Work on Nematodes 2New Funding Validates Importance of Divergence's Work on Nematodes 3
... catalyzes the formation of phosphodiester bonds in ... with 3' hydroxyl and 5' phosphate termini. ... ligation which can be performed in 5 ... substrates for this enzyme. A T4 ...
Bovine Renal Artery Smooth Muscle Cells (BRASMC) (>500,000 cells)...
... BioControl is a major step forward ... liquid handling system - with one ... cone modules. All five single channel ... fit one handle. The lightweight handle ...
Sulfadimethoxine (CH-2027)...
Biology Products: