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:8/31/2014)... have discovered that ,good, cholesterol is turned ,bad, by ... MG, was found to damage ,good, HDL cholesterol, which ... , Low levels of HDL, High Density Lipoprotein, ... of MG being common in the elderly and those ... funding from the British Heart Foundation (BHF) and published ...
(Date:8/31/2014)... of satellite data from the last 19 years reveals that ... the coast of Antarctica to rise by 2cm more than ... of Southampton detected the rapid rise in sea-level by studying ... million square kilometres. , The melting of the ... has contributed an excess of around 350 gigatonnes of freshwater ...
(Date:8/29/2014)... SAN ANTONIO (Aug. 29, 2014) Scientists at the ... the School of Medicine at the UT Health Science ... longevity in the tissues of the longest-lived rodent, the ... factor in the cells of naked mole rats protects ... disposer for damaged and obsolete proteins. , The factor ...
Breaking Biology News(10 mins):Sugar substance 'kills' good HDL cholesterol, new research finds 2Factor in naked mole rat's cells enhances protein integrity 2
... lining , The intestines have to work properly if we ... must be secreted, the food broken down into smaller components ... muscles and organs. The lining of the gut is coated ... hormones while keeping dangerous bacteria and toxins at bay. Close ...
... August 30, 2010 The Metcalf Institute ... of Rhode Island Graduate School of Oceanography has ... RAPID Response grant through the Foundation,s office of ... Improving Communication of Oil Spill Research, will support ...
... 30th, 2010 Undergrads often take communication courses unrelated ... Department of Horticulture teamed up with the Library and ... students to research and understand literature searchers and incorporate ... Jeanine E. Aune, and Gail R. Nonnecke, Iowa State ...
Cached Biology News:Researchers to activate anti-cancer gene 2Metcalf Institute wins NSF grant to help journalism and communication of oil spill research 2Teaching communication and information literacy skills 2
(Date:8/28/2014)... Best Sanitizers, Inc., the first company ... sanitizer, asks food processors and food handling professionals to ... they’re currently using to Best Sanitizers’ Alpet® E3 ... to fighting cross-contamination and the spread of pathogens in ... are key criteria that make a hand sanitizer most ...
(Date:8/28/2014)... in spintronics, an electronic which is not only ... on their spin and the spin-related magnetism. Spin-charge ... signals and vice versa. Recently, the research group ... Physics at Johannes Gutenberg University Mainz in collaboration ... has for the first time realised a new, ...
(Date:8/28/2014)... executives from clinical trial marketing firm BBK Worldwide will lead ... Clinical Trials 2014 , to be held at the Hyatt ... Patient recruitment experts Bonnie A. Brescia , Matthew ... on the benefits of employing an effective patient engagement strategy, ... mobile apps – can be used to drive study participation ...
(Date:8/28/2014)... Aug. 28, 2014  Armetheon, Inc. ( www.armetheon.com ... mid- to late-stage cardiovascular drug candidates, today announced ... first round of financing. The Series A round ... Bioventures with participation from investors that included Atheneos ... Dr. Larry Hsu , the founder of ...
Breaking Biology Technology:Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 3A new, tunable device for spintronics 2A new, tunable device for spintronics 3BBK Worldwide Leads Sessions at Key September Events 2Armetheon Completes $7.0 Million Series A Financing 2Armetheon Completes $7.0 Million Series A Financing 3
... Top 25 Global Pharmaceutical Companies Select Drug ... Visualization, MOUNTAIN VIEW, Calif., April 2, 2008 ... provider of software,strategic consulting, and regulatory services for ... 25 global pharmaceutical,companies have become customers for its ...
... 1, 2008 MiMedx Group, Inc.,(OTC Bulletin Board: ... AYXC), today reported that the contemplated reverse stock ... related name change, to,MiMedx Group, Inc., was approved ... a result of the reverse split and redomestication, ...
... Installation and Major Data Migration in ... United States and Abroad, CHICAGO, April 1, ... signed an agreement with the Cleveland,Clinic, a not-for-profit ... deploy the syngo(R) Dynamics cardiology image,management and reporting ...
Cached Biology Technology:Pharsight Signs Two New DMX(R) License Customers 2Pharsight Signs Two New DMX(R) License Customers 3MiMedx Group Announces Post-split Name Change 2MiMedx Group Announces Post-split Name Change 3Siemens Signs Multi-Year Agreement With Cleveland Clinic to Deploy Enterprise-Wide Cardiology PACS 2
Rabbit polyclonal to Somatostatin 28 ( Abpromise for all tested applications). entrezGeneID: 6750 SwissProtID: P61278...
... Features Convenient platform for tube ... - 96 x 0.2ml V-bottom tubes ... Thermo-Tube Plates - Thermo-Fast® 96 Non-Skirted ... - 48 x 0.5ml Thermo-Tubes Multiple ...
... Pro upgrade for Shimadzu Phoretix 2D, Expression ... statistical tools for comparative gel analysis studies ... Data base add on component ... version 9i release 2 client software). ...
... systems provide linking and labelling reagents ... specific primary antibodies for visualising cellular ... accomplished using an ultra-sensitive indirect labelling ... technology. Secondary antibodies are polymerised directly ...
Biology Products: