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:10/16/2014)... and Mary,s Virginia Institute of Marine Science have ... Protection Agency to identify the streams and wetlands ... tools to help local governments and citizens conserve ... on a dataset of tidal-marsh observations first gathered ... this historical baseline can today,s researchers accurately map ...
(Date:10/16/2014)... monocultures can be cultivated efficiently, they are anything ... caused by monoculture cultivation is becoming increasingly evident. ... crop form and are regarded as the sole ... – quite wrongfully, finds Bernhard Schmid, an ecology ... a novel form of agriculture and forestry. After ...
(Date:10/16/2014)... , October 16, 2014 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... edge technologies including Wocket™, the Smart Wallet, at the ... FiRe is a leading global conference on the intersection ... by Mark Anderson , founder and publisher of ...
Breaking Biology News(10 mins):EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
... weekend warriors: the simple act of exercise and not ... a new University of Florida study finds. People ... gaining strength or boosting cardiovascular fitness feel just as ... said Heather Hausenblas, a UF exercise psychologist. Her study ...
... sees the launch of Ensembl Plants a ... by the European Molecular Biology Laboratory,s European ... Spring Harbor Laboratory, USA. Ensembl Plants allows researchers ... genome-scale experiments in different plant species. By pinpointing ...
... disease and other diet related health problems received a 4 ... projects. The projects, taking place in universities and research institutes ... publicly-funded Research Councils and 15 companies. This means the research ... in our society but in a way that the food ...
Cached Biology News:UF study: Exercise improves body image for fit and unfit alike 2UF study: Exercise improves body image for fit and unfit alike 3New portal for plant genomics will support research into improved crops 2Public sector and industry unite to attack obesity and heart disease 2
(Date:10/25/2014)... ... the addition of the  "The Global Market ... Nanomaterials "  report to their offering.  ... graphene are the strongest, lightest and most ... performance-per-weight greater than any other material. In ...
(Date:10/22/2014)... The Americas Inorganic Refrigerants Market report ... Americas with analysis and forecast of revenue. , ... Refrigerants Market report, to get an idea of ... glimpse of the segmentation in the Americas inorganic ... and figures. , http://www.micromarketmonitor.com/market/americas-inorganic-refrigerants-4191654241.html , ...
(Date:10/22/2014)... Cranford, NJ (PRWEB) October 22, 2014 ... technologies and services – has been working with a ... Health and New Haven Farms Community Farming Collaborative to ... iPad-based ePRO solution. The study, which started in ... Wellness program that provides participants weekly exposure to and ...
(Date:10/22/2014)... According to new market research report "Cloud Professional ... & Support), by Service Model (SaaS, PaaS, IaaS), ... & Community)) - Global Forecast to 2019", published ... Services Market into various sub-segments with an in-depth ... the drivers and restraints for this market with ...
Breaking Biology Technology:The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5
... DIEGO -- In the Sept 9, 2010 issue of ... of concept studies that show its proprietary compound, NGP ... Alzheimer,s disease (AD) in a transgenic mouse model. ... the gamma secretase modulator (GSM) compound from NGP, the ...
... GAITHERSBURG, Md. Using a one-of-a-kind instrument designed and ... (NIST), an international team of researchers have "unveiled" a ... in graphene can split up into an unexpected and ... low temperatures and extremely high magnetic fields. Published in ...
... THE WOODLANDS, Texas, Sept. 9 Lexicon Pharmaceuticals, ... company focused on discovering breakthrough treatments for human disease, ... president and chief executive officer, will present at the ... 16, 2010 at 9:10 a.m. Eastern Time. ...
Cached Biology Technology:Neurogenetic studies show proprietary compound reduces brain plaques linked to Alzheimer's 2NIST researchers hear puzzling new physics from graphene quartet's quantum harmonies 2NIST researchers hear puzzling new physics from graphene quartet's quantum harmonies 3Lexicon to Present at Stifel Nicolaus Healthcare Conference 2