Navigation Links
Spring cold snap helps with stream ecosystem research
Date:7/23/2009

OAK RIDGE, Tenn., July 23, 2009 -- A rare April freeze in 2007 provided researchers at the Department of Energy's Oak Ridge National Laboratory with further evidence that climate change could have negative effects on stream and forest ecosystems.

As warm weather arrives sooner in many parts of the nation, forest plants and trees on the banks flourish, shading the stream from sunlight and causing an overall decrease in productivity in the late spring and summer. A research paper published in this month's issue of Global Change Biology titled "Unexpected effect of climate change: Stream ecosystem responses to the 2007 spring freeze" describes how a small change in canopy cover can dramatically impact a stream.

"The study implies that the algal productivity pulse in the stream that drives the ecosystem during the spring months could be shortened with climate change if leaf-out continues to occur earlier each year," said ORNL researcher Patrick Mulholland, author of the paper. "The stream no longer gets that period of peak productivity in spring because the leaves are shading the stream when the sun angle is relatively high."

For this particular study, an Arctic air mass sent temperatures to below 28 degrees Fahrenheit for several nights in succession, freezing many of the newly emerged leaves and leaving the stream exposed to higher than normal levels of sunlight over the next several months.

This early April freeze resulted in positive effects for a well-studied East Tennessee stream and reiterated the importance of sunlight on the growth of algae, bacteria, snails and other organisms in forest streams.

Compared to typical conditions, the post-freeze conditions set in motion a chain reaction.

"Increased light levels caused a cascade of ecological effects in the stream, beginning with considerably higher growth rates during the late spring and summer months when normally low light levels severely limit
'/>"/>

Contact: Emma Macmillan
macmillanee@ornl.gov
865-241-9138
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Page: 1 2

Related biology news :

1. Springer to collaborate with the Human Genome Organization
2. Springer launches SpringerImages
3. Battle of the sexes benefits offspring, says research
4. Bisphenol A exposure in pregnant mice permanently changes DNA of offspring
5. Springer Series editor John Smol receives two prestigious biology awards
6. Resilin springs simplify the control of crustacean limb movements
7. Spring agricultural fires have large impact on melting Arctic
8. Mothers give interlopers offspring a head start in life
9. Protein analysis methods, viral vectors featured in Cold Spring Harbor Protocols
10. Just in time for spring: Scientists find the cellular on and off switch for allergies and asthma
11. Springer launches StemCellGateway.net

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/24/2009)...ning new doors to understanding how sounds associa...marine mammal or if they hear it at all. , The ... that NASA uses to detect flaws in the space shutt...cientists to peek inside the giant head of a whale...al replicas of a whale,s hearing anatomy using a b...
(Date:11/24/2009)...on of a remarkable class of ring-shaped protein mo...wrence Berkeley National Laboratory (Berkeley Lab)...beamline at the Advanced Light Source (ALS). These...ion and replication, and are vital to the survival...ents, such as the human papillomavirus, which has ...
(Date:11/24/2009)...tica has long held secrets of the earth,s history ...e has been very little information on the environm...r millions of years. Now, a team of researchers fr...ded to the tune of $10 million dollars by the Nati...tom of things literally. These scientists will dr...
Breaking Biology News(10 mins):Rocket science leads to new whale discovery 2Atomic-level snapshot catches protein motor in action 2Atomic-level snapshot catches protein motor in action 3Atomic-level snapshot catches protein motor in action 4LSU gets to the bottom of things -- in Antarctica 2West Acquires Drug Delivery Assets From Plastef Investissements SA 50884 1West Acquires Drug Delivery Assets From Plastef Investissements SA 50884 2European Prices of 170 Best Selling Drugs Averaged 40 Percent Less Than U S Prices in 2008 50882 1European Prices of 170 Best Selling Drugs Averaged 40 Percent Less Than U S Prices in 2008 50882 2Biostar Pharmaceuticals Inc Commences the Full Implementation of New Rural Cooperative Supply Network Plan 50879 1Biostar Pharmaceuticals Inc Commences the Full Implementation of New Rural Cooperative Supply Network Plan 50879 2Biostar Pharmaceuticals Inc Commences the Full Implementation of New Rural Cooperative Supply Network Plan 50879 3
...ature is a valued source of inspiration for artist..." Would a bird even like rock and roll" , Concept...ssor of fine arts at Rutgers University—Camden, is...friends with an exhibition featuring four 10-foot ... best in classical, rock, country, and jazz for lo...
...cientists at Johns Hopkins have discovered one way...e colon cancer cells. Their report will be publish...esearch team identified a tiny bit of genetic code...53,s uncanny ability to kill cells likely to becom...ei. MicroRNAs are small chains of ribonucleic acid...
... These time-lapse images of a bovine aortic endoth...leus of a message-carrying protein called paxillin...Credit: UC San Diego Scientists have captured on ...ry service. Reporting in the journal Biochemical a...engineering researchers at UC San Diego published ...
Other Biology News:Art and music for the birds 2Common cancer gene sends death order to tiny killer 2Cellular message movement captured on video 2Cellular message movement captured on video 3
(Date:11/24/2009)..., Whether it,s CD packaging, containers or identi...ication) are increasingly finding their way into e...ts or goods and identify them automatically by rad... process the data contained in the label. Smart la...itions of up to 100 degrees Celsius. But at higher...
(Date:11/24/2009)...swire-FirstCall/--DowAgroSciencesCanadaannouncedto...ThompsonsLimitedofBlenheim,Ontario.TheadditionofHy...eedsbusinessasthecompanyanticipatestheintroduction...cideTolerantTraitTechnologyincornin2012.Thetransac...cquisitionbringstogethertwostrongprogressivecompan...
(Date:11/24/2009)...armaceuticalsInc.announced,theUSPatent&Tradema...nano-particleoraldeliveryorNODtechnology. , N...epeptidesor,proteinsintobio-adhesivenano-particles...sinjections.NODtechnologyisaplatformtechnology,tha...n,interferon,growthhormone,exenatide,heparinandmo...
(Date:11/24/2009)...ientswithadvanced-stage,orrecurrentendometrialcanc...-AEternaZentarisInc.(NASDAQ: AEZS ;TSX:AEZ)(the"Co...docrinetherapyandoncology,todayannouncedpositiveef...peptideconjugate,AEZS-108(formerlyAN-152),inpatien...onalizedhealthcareapproach,thestudyselectedpatient...
Breaking Biology Technology:Intelligence inside metal components 2Dow AgroSciences Canada Announces Agreement to Acquire Hyland Seeds 2Dow AgroSciences Canada Announces Agreement to Acquire Hyland Seeds 3AEterna Zentaris Announces Positive Results for Phase 2 Study with LHRH-Receptor Targeted Cytotoxic Conjugate AEZS-108 in Endometrial Cancer 2AEterna Zentaris Announces Positive Results for Phase 2 Study with LHRH-Receptor Targeted Cytotoxic Conjugate AEZS-108 in Endometrial Cancer 3AEterna Zentaris Announces Positive Results for Phase 2 Study with LHRH-Receptor Targeted Cytotoxic Conjugate AEZS-108 in Endometrial Cancer 4
... Trust, Inc.,(NYSE: BMR ) today announced that it...2007 dividend of $0.31 per share of common stock. ...nd of $1.24 per common share. BioMed also announc...dend of $0.46094 per share of the company,s 7.375%...r the period from July 16, 2007 through,October 15...
...n Inc.,(Nasdaq: KYPH ) announced today that it ha...sion (FTC) and U.S. Department of Justice under th...1976 (as amended) with,respect to its acquisition ... associated intellectual property rights of Disc-O... Israeli company, and its U.S.,subsidiary. This cl...
...orefront, SACRAMENTO, Calif., Sept. 16 Novatrix ...d a new company, Curexo Medical, Inc.,(CMI), with ...al Services,Inc. (ISS). Under the licensing agreem...quired from ISS to CMI. Curexo Medical, Inc., loc...r officers and employees of ISS in order to facili...
Other Biology Technology:BioMed Realty Trust Declares Third Quarter 2007 Common Stock and Preferred Stock Dividends 2Federal Trade Commission Clears Kyphon's Acquisition of Non-Vertebroplasty Spine-Related Assets of Disc-O-Tech 2New Orthopedic Surgical Robotics Company Opens Its Doors; Files with the FDA for Clearance of Its Flagship Product 2
Holten Maxi Safe 2010 Cabinet Model 1.5, with divided tabletop from Thermo Scientific
...is designed for paramagnetic bead precipitation fr...l PCR plates with no additional accessories. The s...96-well microplate footprint. The use of 24 extrem...ast (as little as 30 seconds) magnetic separation....
...personal desktop unit ideal for use in laboratorie... speed set at 12 rpm , Temperature control from a...0mm bottles, eight 50 ml or 15 ml conical ,plastic...d with microprocessor controls , Chamber interior...
...ically engineered for efficient drying down of syn...ass cover and a post-trap with ammonia neutralizin...ree processing of samples in ammonium hydroxide., ...tic Oligos , Comes standard with a glass lid ...
Biology Products: