Navigation Links
Severe drought, other changes can cause permanent ecosystem disruption
Date:10/13/2011

istics."

The phenomena, the researchers say, does not so much indicate the disappearance of life there is about as much abundance as before. It's just not the same.

"Our study focused on a single stream in isolation, but this process of drying and local extinction is happening across the desert Southwest," Bogan said. "Eventually this could lead to the loss of species from the entire region, or the complete extinction of species that rely on these desert oases."

Small streams such as this are of particular interest because they can be more easily observed and studied than larger rivers and streams, and may represent a microcosm of similar effects that are taking place across much of the American West, the researchers said. The speed and suddenness of some changes give species inadequate time to adapt.

"It's like comparing old-growth forests to second-growth forests," Lytle said. "There are still trees, but it's not the same ecosystem it used to be. These desert streams can be a window to help us see forces that are at work all around us, whether it's due to climate change, land management or other factors."

The researchers noted in their report that the last 30 years have been marked by a significant increase in drought severity in the Southwest. The drought that helped dry up French Joe Canyon in 2005 resulted in the lowest flow in Arizona streams in 60 years, and in many cases the lowest on record. At French Joe Canyon, the stream channel was completely dry to bedrock, leaving many aquatic invertebrates dead in the sediments.

That was probably "an unprecedent disturbance," the researchers said in their report. Community composition shifted dramatically, with longer-lived insects dying out and smaller, shorter-lived ones taking their places.

Conceptually similar events have taken place in the past in plant communities in the Florida Everglades, floodplains in Australia, and boreal forests following fi
'/>"/>

Contact: David Lytle
lytleda@oregonstate.edu
541-737-1068
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. NIH grant will allow researchers to look for viral cause of most severe form of multiple sclerosis
2. Scientists move closer to predicting who will and will not fight off severe infections
3. Study: Severe low temperatures devastate coral reefs in Florida Keys
4. New study suggests severe deficits in UK honeybee numbers
5. Tiny bubbles signal severe impacts to coral reefs worldwide
6. 2,300-year climate record suggests severe tropical droughts as northern temperatures rise
7. A new method to localize the epileptic focus in severe epilepsy
8. Gene responsible for severe osteoporosis disorder discovered
9. Newborn screening increases survival outcome for patients with severe combined immunodeficiency
10. Cord blood cell transplantation provides improvement for severely brain-injured child
11. Genetic defect found to cause severe epilepsy and mental retardation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2014)... The work has been published in the Scientific Reports ... of Evolutionary Biology (a joint centre of CSIC and Pompeu ... Bourbons was decoded and we saw that it did not ... we decided to sequence the complete genome and to make ... could actually belong to Louis XVI". , The functional ...
(Date:4/24/2014)... by fungus could now be treated in three days, rather ... scientists. , Cryptococcus a form of yeast ... medical research. They are found in many parts of ... mainly affect people with weakened immune systems. This infection kills ... team has tested the effects of the most commonly used ...
(Date:4/24/2014)... With a new generation of military veterans returning home ... become a prominent concern in American medical institutions and ... 35 percent of personnel deployed to Iraq and Afghanistan ... South Carolina School of Medicine is shedding light on ... and surprising ways. , The rise in PTSD has ...
Breaking Biology News(10 mins):The blood preserved in the pumpkin did not belong to Louis XVI 2Treatment for deadly yeast disease reduced to 3 days 2New study links inflammation in those with PTSD to changes in microRNA 2New study links inflammation in those with PTSD to changes in microRNA 3
... . , Barcelona, Spain: Research into the effect ... reproduction technology (ART) shows that for younger women, the overwhelming ... women over the age of 40 had a more consistent, ... four attempts. Mr Simon Hong told the 24th ...
... production of alternative fuels from plant material, enzymes which ... required in industrial quantities and at a low cost. ... have come up with a solution: using plants to ... the Bioseparations Lab, will describe their research on Monday ...
... study published in the current issue of Science ... species has been increasing continuously since the origin of ... professor at Texas A&M University, has been a part ... study, which concludes that most of the diversification occurred ...
Cached Biology News:Failure of the 1st attempt at assisted reproduction justifies at least 1 additional cycle 2Failure of the 1st attempt at assisted reproduction justifies at least 1 additional cycle 3A green solution to biofuel production 2Setting the record right: species diversity less dramatic than previously believed 2
(Date:1/15/2014)... The Pittcon Organizing Committee is pleased to announce that ... an e-Journal and producer of Food Labs Conference ... for the co-location of Food Labs Conference to be held ... registration fee to attend the two-day Food Lab Conference, March ...
(Date:1/15/2014)... 15, 2014 Cynvenio, a cancer diagnostics ... the genomic analysis of tumor cells in the bloodstream, ... web-based cancer decision support application powered by CollabRx, Inc. ... ClearID™ genomic test, Therapy Finder will provide breast cancer ...
(Date:1/15/2014)... 15, 2014 This webinar will focus ... clinical safety assessment in biosimilars. , Regulatory frameworks are ... drug development, however the complex nature of biopharmaceuticals makes ... and efficacy extremely challenging. Based on the specific aspects ...
(Date:1/15/2014)... Two champions of science, technology, engineering, ... an annual competition for middle and high school students ... STEM study. The competition presents students with real-world problems ... Aptitude, Mathematics, and Sciences is a program administered ...
Breaking Biology Technology:Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5
... P. Hammer, Ph.D., director of chemical development. , ... ... (NEP), has named Robert P. Hammer, Ph.D., director of chemical development. ... where he was the William A. Pryor professor of chemistry since ...
... a laptop computer on your lap lately, you probably ... are creating more and more heat, which has to ... , Two researchers at the University of Virginia,s School ... scientific groundwork that will solve the problem using nanoelectronics, ...
... Sept. 29 Sangamo,BioSciences, Inc. (Nasdaq: SGMO ) ... provide an update on the progress of,Sangamo,s ZFP Therapeutic ... at 11:30 a.m. (ET) on Monday, October 6, 2008,at ... 8:40 a.m.,(ET) on Tuesday, October 7, 2008 at the ...
Cached Biology Technology:New England Peptide Names Director of Chemical Development 2Engineers aim to solve 'burning' computer problem 2Sangamo BioSciences to Present at Two Upcoming Investor Conferences 2
... Premixed solution for high PCR ... to the combination of enzyme with ... Reduced nonspecific amplification provided by ... Easy handling convenient Master Mix ...
Recombinant Ovine IFN Tau. Active on sheep, cow, human and mouse cells. Activity: 5.7 x 10 7 u/mg...
Request Info...
... fast and efficient microplate stacker ... capacity and reliable design allow for ... time than typical stackers. Its ... for a seamless and trouble-free installation ...
Biology Products: