Navigation Links
Pacific Northwest trees struggle for water while standing in it
Date:7/25/2011

CORVALLIS, Ore. Contrary to expectations, researchers have discovered that the conifers of the Pacific Northwest, some of the tallest trees in the world, face their greatest water stress during the region's eternally wet winters, not the dog days of August when weeks can pass without rain.

Due to freeze-thaw cycles in winter, water flow is disrupted when air bubbles form in the conductive xylem of the trees. Because of that, some of these tall conifers are seriously stressed for water when they are practically standing in a lake of it, scientists from Oregon State University and the U.S. Forest Service concluded in a recent study.

It's not "drought stress" in a traditional sense, the researchers said, but the end result is similar. Trees such as Douglas-fir actually do better dealing with water issues during summer when they simply close down their stomata, conserve water and reduce their photosynthesis and growth rate.

"Everyone thinks that summer is the most stressful season for these trees, but in terms of water, winter can be even more stressful," said Katherine McCulloh, a research assistant professor in the OSU Department of Forest Ecosystems and Society.

"We've seen trees in standing water, at a site that gets more than two meters of rain a year, yet the xylem in the small branches at the tops of these trees can't transport as much water as during the summer," McCulloh said.

The ease with which water moves through wood is measured as the "hydraulic conductivity," and researchers generally had believed this conductivity would be the lowest during a conventional drought in the middle of summer. They found that wasn't the case.

"We thought if there was a serious decline in conductivity it would have been from drought," said Rick Meinzer, a researcher with the Pacific Northwest Research Station of the USDA Forest Service, as well as OSU. "It was known that air bubbles could form as increased tension is
'/>"/>

Contact: Kate McCulloh
kate.mcculloh@oregonstate.edu
541-737-4208
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Brookhaven scientists take off for southeastern Pacific climate study
2. British scientists go cloud-hopping in the Pacific to improve climate predictions
3. Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions
4. Scientists achieve first tracking of salmon from headwaters in Rockies through Pacific to Alaska
5. Eastern Pacific tuna hang in the balance
6. Smithsonian puts tropical Eastern-Pacific shore fishes online
7. Smithsonian puts tropical eastern Pacific shore fishes online
8. Invasives threaten salmon in Pacific Northwest
9. Scientists urge world leaders to respond cooperatively to Pacific Ocean threats
10. Pacific Northwest forests could store more carbon, help address greenhouse issues
11. AAAS Pacific division scientific conference to meet in San Francisco Aug. 14 - 19
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/13/2014)... New research raises the prospect of more effective treatments ... occurring in about half of all cancer patients, raising ... Cancer Institute. , Many strategies have been tried to ... patients can,t endure potentially life-saving treatments, but none have ... 13 advanced online edition of Nature , led ...
(Date:7/11/2014)... Society for Bone and Mineral Research awarded Michael F. ... (BUSM), with the 2014 Louis V. Avioli Award. Holick, ... is internationally known for revolutionizing the understanding of vitamin ... The award honors a member of the American Society ... to bone and mineral basic research. It is named ...
(Date:7/11/2014)... from The Chinese University of Hong Kong, BGI and ... linked to salt tolerance, with implication for improving this ... published online in Nature Communications provides an ... improvement. , Soybean is an important crop for the ... have less genetic diversities than their wild counterparts. Among ...
Breaking Biology News(10 mins):Antibody halts cancer-related wasting condition 2Antibody halts cancer-related wasting condition 3BUSM's Michael F. Holick receives American Society for Bone and Mineral Research award 2BGI reports a novel gene for salt tolerance found in wild soybean 2
... study, which was directed by Scripps Research Professor ... September 8 issue of The Journal of Biological ... than the one previously suggested-for the biosynthesis of ... endogenous cannabinoid ("endocannabinoid") anandamide. The high activity of ...
... Yujiang Song have discovered a better way to see where ... that produces novel hollow platinum nanostructures. , The research will ... German chemical journal Angewandte Chemie Int. Ed. In advance of ... the journal's web site. , Sandia is a National ...
... a common heavy metal are unable to obtain sufficient ... a new study presented at The American Physiological Society ... how cadmium, a heavy metal, reduces the oyster's tolerance ... during the summer when water temperatures rise. Half of ...
Cached Biology News:Study shows enzyme builds neurotransmitters via newly discovered pathway 2Sandia researchers discover way to see how a drug attaches to a cell 2Rising ocean temperatures, pollution have oysters in hot water 2Rising ocean temperatures, pollution have oysters in hot water 3Rising ocean temperatures, pollution have oysters in hot water 4
(Date:7/10/2014)... 2014 Senior supply chain management executives ... addressed the challenges of “Reducing Cost, Lead Time, & ... strategic sourcing. Describing the partnership of the Bio Supply ... Management Institute ( SCMI) of the University of ... at the Kroc Institute of Peace and Justice in ...
(Date:7/10/2014)... Utah , July 10, 2014 /PRNewswire-iReach/ ... annotation and interpretation, today announced an agreement ... (NGS) analytics for Lineagen,s NextStep Dx ... of neurodevelopmental and neurological disorders, currently offers ... microarray (CMA) testing service used by healthcare ...
(Date:7/10/2014)... in the fight against terrorism with the creation of ... with the use of light and special glass fibres. ... B: Chemical , the researchers describe a novel optical ... low as 6.3 ppm (parts per million). It requires ... "Traditionally explosives detection has involved looking for metals that ...
(Date:7/10/2014)... have observed the fractional quantum Hall effect in bilayer ... can be tuned by an electric field. , ... electrons confined to thin sheets are exposed to large ... where thousands of individual electrons behave as a single ... is well established, many details of this collective behavior ...
Breaking Biology Technology:Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Detecting trace amounts of explosives with light 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3
... H.C. Birnboim , DNA Genotek, ... Oragene gives higher DNA yields than other oral, collection ... g. In comparison, buccal, swabs may yield as little as 1.9 ... Introduction , The number of studies ...
, , Daniel G. Flowers and Lloyd A. Culp, Ph.D., , , , back to top...
... Julie Chang, Bio-Rad Laboratories, Inc., 2000 Alfred Nobel ... Introduction , ... throughput and automating the sequencing process. This high-throughput , ... laboratories, driving such , achievements as the ...
Cached Biology Technology:DNA Yield with Oragene 2Comparison of Commercial Dye Terminator Removal Kits, Rev A 2Comparison of Commercial Dye Terminator Removal Kits, Rev A 3Comparison of Commercial Dye Terminator Removal Kits, Rev A 4Comparison of Commercial Dye Terminator Removal Kits, Rev A 5
Adenylate kinase isoenzyme 6...
...
Goat polyclonal to Rabenosyn 5 ( Abpromise for all tested applications). Antigen: Synthetic peptide: ELKHTLAKQKGGTD, corresponding to C terminal amino acids 771-784 of Human Rabenosyn 5. Entr...
... ( Abpromise for all tested ... Synthetic peptide derived from residues 231 ... (Note: the amino acid sequence is ... Entrez Gene ID: 80829 ...
Biology Products: