Navigation Links
Catastrophic amphibian declines have multiple causes, no simple solution
Date:4/25/2011

>Efforts to understand these events, especially in the study of amphibians, have often focused on one cause or another, such as fungal diseases, invasive species, an increase in ultraviolet radiation due to ozone depletion, pollution, global warming, and others. All of these and more play a role in the amphibian declines, but the scope of the crisis can only be understood from the perspective of many causes, often overlapping. And efforts that address only one cause risk failure or even compounding the problems, the researchers said.

"Given that many stressors are acting simultaneously on amphibians, we suggest that single-factor explanations for amphibian population declines are likely the exception rather than the rule," the researchers wrote in their report. "Studies focused on single causes may miss complex interrelationships involving multiple factors and indirect effects."

One example is the fungus B. dendrobatidis, which has been implicated in the collapse of many frog populations around the world. However, in some populations the fungus causes no problems for years until a lethal threshold is reached, studies have shown.

And while this fungus disrupts electrolyte balance, other pathogens can have different effects such as a parasitic trematode that can cause severe limb malformations, and a nematode that can cause kidney damage. The combination and severity of these pathogens together in a single host, rather than any one individually, are all playing a role in dwindling frog populations.

Past studies at OSU have found a synergistic impact from ultraviolet radiation, which by itself can harm amphibians, and a pathogenic water mold that infects amphibian embryos. And they linked the whole process to water depths at egg-laying sites, which in turn are affected by winter precipitation in the Oregon Cascade Range that is related to climate change.

The problems facing amphibians are a particular concern, scientists say
'/>"/>

Contact: Andrew Blaustein
blaustea@science.oregonstate.edu
541-737-9869
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Molecular medicine could avert predicted catastrophic vision loss in the aged
2. Study rules out inbreeding as cause of amphibian deformities
3. Study confirms amphibians ability to predict changes in biodiversity
4. Global warming link to amphibian declines in doubt
5. 10 new amphibian species discovered in Colombia
6. Spring fishing season arrives... and with it, amphibian diseases
7. The first gene-encoded amphibian toxin isolated
8. Amphibians as environmental omen disputed
9. Killer fungus threatening amphibians
10. Counting frogs: Why monitoring our amphibian populations is important
11. Shipping industry sends help as project in Panama tackles amphibian crisis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/21/2014)... warming, are set to rise again in 2014 - reaching ... per cent projected rise in burning fossil fuels is revealed ... UK by researchers at the Tyndall Centre for Climate Change ... of Engineering, Mathematics and Physical Sciences at the University of ... Summit, where world leaders will seek to catalyse action on ...
(Date:9/21/2014)... California, San Diego, have developed a program that predicts ... of genes based on sequences of DNA. They describe ... human embryonic cells in a paper published in ... our cells have the same blueprint, the same DNA, ... author of the report. "Skin cells protect, nerve cells ...
(Date:9/21/2014)... strains of bacteria have emerged that resist even the ... forms of tuberculosis and staphylococcus, infect more than 2 ... the urgent need for new treatments, scientists have discovered ... decade. , MIT engineers have now turned a powerful ... that can disable any target gene, they have shown ...
Breaking Biology News(10 mins):CO2 emissions set to reach new 40 billion ton record high in 2014 2CO2 emissions set to reach new 40 billion ton record high in 2014 3Program predicts placement of chemical tags that control gene activity 2Battling superbugs 2Battling superbugs 3Battling superbugs 4
... from ESA,s Envisat satellite radar are being used to ... Globe solo round-the-world yacht race. CLS, a subsidiary ... new radar applications division (formerly the BOOST Technologies Company), ... Envisat radar imagery to operationally observe oceans at high ...
... seascape that cleaves earlier each springthey may find relief in ... changes in the timing of sea-ice breakup and of snow ... least some polar bears with an alternative source of food. ... "Over 40 years, six subadult male bears were seen among ...
... battle against invading bacteria reaches its peak activity at ... Experiments with the laboratory model organism, Drosophila melanogaster, reveal ... with the body,s circadian rhythm, according to Stanford researchers ... Cell Biology (ASCB) 48th Annual Meeting, Dec. 13-17, 2008 ...
Cached Biology News:Vendee Globe route seen from above 2Goose eggs may help polar bears weather climate change 2Immunity stronger at night than during day 2
(Date:9/21/2014)... Chemical Sciences play a significant ... clean air and safe water, healthy food, and ... environmentalists, food scientists, educators, and scientists have a ... field of Chemistry for the national development, and ... of the fastest emerging Sciences, accelerating with a ...
(Date:9/20/2014)... BELLINGHAM, Washington, and PITTSFIELD, Massachusetts, USA (PRWEB) September 20, ... 10 October for the prestigious 2015 Prism Awards ... technology and product inventions from the multi-billion dollar optics ... the international society for optics and photonics , and ... and persistence as well as the versatility of photonics, ...
(Date:9/20/2014)... 2014 HealthTronics, Inc. , ... radiology products and services, has signed a distribution ... Clinicon Corporation for its high precision laser ... minimally invasive, mobile, surgical technology—offering more choices for ... agreement, HealthTronics will make available Clinicon’s FDA-cleared SureLase™ ...
(Date:9/20/2014)... MediVet America and NanoFiber Veterinary ... at the specialized Wolvega Horse Clinic. , Due to ... was ruptured 90% and her deep digital flexor tendon ... sentence for a horse. , The clinic has performed ... This revolutionary regenerative option for ruptured tendons has ...
Breaking Biology Technology:Chemistry for Global Development during the Open Access Week 2Chemistry for Global Development during the Open Access Week 3Entry deadline is 10 October for international photonics Prism Awards 2Entry deadline is 10 October for international photonics Prism Awards 3Entry deadline is 10 October for international photonics Prism Awards 4HealthTronics Announces Distribution Agreement with Clinicon-Laser Surgical Device Expands Minimally Invasive, Mobile Technology Portfolio 2HealthTronics Announces Distribution Agreement with Clinicon-Laser Surgical Device Expands Minimally Invasive, Mobile Technology Portfolio 3World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 2World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 3
... 10, 2009, NeoStem, Inc. (NYSE Alternext US: NBS) (the ... "Alternext") indicating that the Company is not in compliance ... "Guide"), which requires a listed company to hold meetings ... Company had announced that it planned to hold a ...
... ITMN ) today announced the pricing of an underwritten ... The last reported sale price of InterMune,s common stock on ... $17.96. The offering is expected to close on or ... All of the shares are being sold by the company.UBS ...
... Pharmacyclics, Inc.,(Nasdaq: PCYC ) today reported financial ... net loss for the second quarter of fiscal 2009,was $4.8 ... of $5.9 million,or $0.23 per share, in the second quarter ... expenses were $4.9 million in the second quarter of fiscal,2009, ...
Cached Biology Technology:NeoStem Receives Notice of Noncompliance from NYSE Alternext US 2InterMune Announces Pricing of Public Offering of 3,500,000 Shares of Common Stock 2Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 2Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 3Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 4Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 5Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 6Pharmacyclics Reports Second Quarter Fiscal 2009 Financial Results 7
...
Ultra-sensitive, non-radioactive detection of rat Osteopontin...
Agarose-LE, 250 g. Suitable for soft agarose cloning. Nuclease-free.Gel point (1.5%): 36 1.5 C, EEO (-mr): 1200 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Biochemicals ....
Request Info...
Biology Products: