Navigation Links
A river ran through it
Date:10/14/2010

ity, New Haven, Conn. suggest that the fate of large bodied fishes should be more carefully factored into the management of water use, especially as growing human populations and climate change increasingly affect water availability.

The researchers studied the food webs that live in and depend on rivers for their survival. They studied 36 rivers and streams in the U.S. ranging in size from the Mississippi and Colorado Rivers, down to and their small tributaries. The rivers included in the study provide water for drinking to large cities like New York City, Minneapolis, Phoenix, Las Vegas and Los Angeles.

At the top of these food webs were large bodied fish, which appear the most vulnerable to variations in river flows. The researchers found that even though the mechanics were different, the end result of floods and droughts on the food webs were similar and the effects appear to be long lasting.

The study employed naturally occurring stable isotopes of the element nitrogen to measure how high top-predators were in the food chain. Nitrogen provides an indicator for how high a consumer is in the food chain because it bioaccumulates increasing by 3.4 parts per million with each link in the chain.

"Floods simplify the food web by taking out some of the intermediate players in it so that the big fish begin to eat lower on the food chain than they would if the food web were not exposed to high flows," Sabo said. "That makes them lower on the food chain themselves. Predators that eat lower on the food chain are having a dinner that has essentially missed a meal in itself. Imagine a lion eating grass, instead of eating gazelles that eat grass."

"With droughts, it's completely different, they just eliminate the top predator altogether because many fish just can't tolerate the low oxygen and high temperatures that follow when a stream starts drying out," said Sabo, who specializes in river and riparian ecosystems. "Even if it
'/>"/>

Contact: Skip Derra
skip.derra@asu.edu
480-965-4823
Arizona State University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. L-1 Identity Solutions Receives $5.9 Million Drivers License Contract Expansion from the State of Mississippi
2. L-1 Identity Solutions Awarded New Massachusetts RMV Drivers License Contract Valued at an Estimated $32 Million
3. Case Western Reserve University project ties soil conservation and river management together
4. UC Riverside biochemists devise method for bypassing aluminum toxicity effects in plants
5. Vitamin D a key player in overall health of several body organs, says UC Riverside biochemist
6. Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions
7. UC Riverside scientist to explore how vegetation affects urban heat islands
8. Salmon smolt survival similar in Columbia and Fraser rivers
9. Alpine rivers hold important clues for preserving biodiversity and coping with climate change
10. Rivers are carbon processors, not inert pipelines
11. UC Riverside rice geneticist receives high honor from US Department of Agriculture
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A river ran through it
(Date:8/28/2014)... is available in German . ... owes its name to a striking pattern of blue stripes ... cells, reflective silvery cells, and yellow cells emerge during growth ... as a multilayered mosaic to compose the characteristic colour pattern. ... types have to interact to form proper stripes, the embryonic ...
(Date:8/28/2014)... Researchers at the University of Minnesota have developed ... to be used for muscle regeneration research as well ... FSHD. , The research is published in the current ... There is no treatment for FSHD, which is thought ... muscular dystrophy. FSHD is an unusual genetic disorder because, ...
(Date:8/28/2014)... Advocate and Senior Staff Attorney at the Electronic Frontier ... of biometric and mobile commerce experts set to speak ... Tampa, Florida on September 15, ... Rahman, Director, Technology and Strategy at Samsung, and Philippe de ... this year,s event is Mobility at the Crossroads of ...
Breaking Biology News(10 mins):How the zebrafish gets its stripes 2How the zebrafish gets its stripes 3UMN researchers find animal model for understudied type of muscular dystrophy 2Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2
... noninvasive, polarized light microscope invented at the Marine Biological ... breakthrough in embryonic stem-cell research aimed at developing medical ... of Oregon Health & Science University reported the ... in the November 22 issue of Nature. While embryonic ...
... a traumatic brain injury and using club drugs have in ... a similar chemical chain reaction in the brain, leading to ... A series of studies at UF over the past ... also called MDMA, and other forms of methamphetamine lead to ...
... Boulder, CO, USA - Topics include: onset of plate ... climate system; cause of the end-Permian mass extinction; Olduvai ... ancient mantle plume and the break-up of Rodinia; relationship ... composition and eruption forecasting; and cause of the end ...
Cached Biology News:Oosight microscope enables embryonic stem cell breakthrough 2Oosight microscope enables embryonic stem cell breakthrough 3Oosight microscope enables embryonic stem cell breakthrough 4Club drugs inflict damage similar to traumatic brain injury 2Club drugs inflict damage similar to traumatic brain injury 3December GEOLOGY and GSA TODAY media highlights 2December GEOLOGY and GSA TODAY media highlights 3December GEOLOGY and GSA TODAY media highlights 4December GEOLOGY and GSA TODAY media highlights 5December GEOLOGY and GSA TODAY media highlights 6December GEOLOGY and GSA TODAY media highlights 7December GEOLOGY and GSA TODAY media highlights 8December GEOLOGY and GSA TODAY media highlights 9December GEOLOGY and GSA TODAY media highlights 10
(Date:8/29/2014)... , Aug. 29, 2014 /PRNewswire/ - iCo Therapeutics ... today reported financial results for the six months ... are expressed in Canadian dollars and presented under ... Quarter 2014 Highlights , Announced top-line ... (VA) primary endpoint for subjects enrolled in the ...
(Date:8/29/2014)... 2014 Three Lawrence Livermore researchers ... Hydrogen Production R&D Award for their research ... using sunlight. , Shared with collaborators from the ... of Nevada, Las Vegas (UNLV), the award recognizes ... photoelectrochemical solar-hydrogen production and corrosion processes. , These ...
(Date:8/29/2014)... 2014 A major challenge before new ... dense realm of Boston-Cambridge, is gaining visibility that can ... Sherley, the Director of Boston’s Adult Stem Cell Technology ... national visibility of his company an important priority since ... addition to a social media marketing campaign ...
(Date:8/28/2014)... SAN DIEGO, California, USA (PRWEB) August 28, 2014 ... at the Department of Physics and Optical Science and ... at the University of North Carolina at Charlotte, and ... has been elected to serve as the 2015 Vice ... photonics. , SPIE 2014 President Philip Stahl announced recent ...
Breaking Biology Technology:iCo Therapeutics Announces Second Quarter 2014 Financial Results 2iCo Therapeutics Announces Second Quarter 2014 Financial Results 3iCo Therapeutics Announces Second Quarter 2014 Financial Results 4Livermore Team Awarded for Hydrogen Production Research 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4Glenn Boreman, UNC Professor and Plasmonics Co-Founder, Elected to SPIE Presidential Chain 2
... often been regarded as the economic motor of the European ... of Scandinavia, to the east of the U.K. and France, ... the east European countries of Poland, the Czech Republic and ... not only one of Europes largest populations but considering ...
... of Healthcare Expected - Connecting Information For Better, ... (NYSE: GE), through its GE Medical Systems division, ... , ,The merger is one of the ... healthcare information industry and is expected to accelerate ...
... success of biotechnology in Illinois and the Midwest? We could ... companies in Illinois ,Increase in new emerging companies ... the financial markets ,Increase in market cap of the ... and indirectly ,Number of new life science patents produced ...
Cached Biology Technology:German Life Science Oktoberfest Comes to the Midwest 2German Life Science Oktoberfest Comes to the Midwest 3German Life Science Oktoberfest Comes to the Midwest 4German Life Science Oktoberfest Comes to the Midwest 5German Life Science Oktoberfest Comes to the Midwest 6GE Acquires Instrumentarium 2Finding a Yardstick For Local Biotech Improvement and Success 2Finding a Yardstick For Local Biotech Improvement and Success 3
... Molecular Probes is pleased to ... for the ultrasensitive detection of primary ... at Indiana University, the ATTO-TAG reagents ... o-phthaldialdehyde (OPA), naphthalene-2,3-dicarboxaldehyde (NDA) and anthracene-2,3-dicarboxaldehyde, ...
Troponin I (22B11)...
... ultra low temperature freezers offer a ... storage of biological samples with high ... separate inner doors ensure excellent warming ... ,Application oriented accessories simplify tracking ...
Chicken polyclonal to UCK2 ( Abpromise for all tested applications). Antigen: Full length protein, corresponding to amino acids 1-261 of Human UCK2 Entrez Gene ID: 7371 Swiss Protein ID: ...
Biology Products: