DECLINING DOWNWIND: AMPHIBIAN POPULATION DECLINES IN CALIFORNIA AND HISTORICAL PESTICIDE USE

2004 ◽  
Vol 14 (6) ◽  
pp. 1892-1902 ◽  
Author(s):  
Carlos Davidson
Keyword(s):  
Pesticide Use ◽  
Population Declines ◽  
Amphibian Population

Amphibian Population Declines and Climate Change

2011 ◽  
pp. 29-54 ◽  
Author(s):  
Andrew Blaustein ◽  
Catherine Searle ◽  
Betsy Bancroft ◽  
Joshua Lawler
Keyword(s):  
Climate Change ◽  
Population Declines ◽  
Amphibian Population

Acidic deposition as an unlikely cause for amphibian population declines in the Sierra Nevada, California

1994 ◽  
Vol 69 (2) ◽  
pp. 155-161 ◽  
Author(s):  
David F. Bradford ◽  
Malcolm S. Gordon ◽  
Dale F. Johnson ◽  
Russel D. Andrews ◽  
W.Bryan Jennings
Keyword(s):  
Sierra Nevada ◽  
Acidic Deposition ◽  
Population Declines ◽  
Amphibian Population

The complexity of amphibian population declines: understanding the role of cofactors in driving amphibian losses

2011 ◽  
Vol 1223 (1) ◽  
pp. 108-119 ◽  
Author(s):  
Andrew R. Blaustein ◽  
Barbara A. Han ◽  
Rick A. Relyea ◽  
Pieter T.J. Johnson ◽  
Julia C. Buck ◽  
...  
Keyword(s):  
Population Declines ◽  
Amphibian Population

The effects of amphibian population declines on the structure and function of Neotropical stream ecosystems

2006 ◽  
Vol 4 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Matt R. Whiles ◽  
Karen R. Lips ◽  
Cathy M. Pringle ◽  
Susan S. Kilham ◽  
Rebecca J. Bixby ◽  
...  
Keyword(s):  
Structure And Function ◽  
Stream Ecosystems ◽  
Population Declines ◽  
Amphibian Population ◽  
Neotropical Stream ◽  
And Function

scholarly journals Genetic characterization of chytrids isolated from larval amphibians collected in central and east Texas

2018 ◽  
Author(s):  
Thomas L. Marshall ◽  
Carlos R. Baca ◽  
Decio T. Correa ◽  
Michael R. J. Forstner ◽  
Dittmar Hahn ◽  
...  
Keyword(s):  
Batrachochytrium Dendrobatidis ◽  
Current Knowledge ◽  
Western Hemisphere ◽  
Coi Gene ◽  
Population Declines ◽  
East Texas ◽  
Global Knowledge ◽  
Amphibian Population ◽  
South Central ◽  
Central Texas

ABSTRACTChytridiomycosis, an emerging infectious disease caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd), has caused amphibian population declines worldwide. Bd was first described in the 1990s and there are still geographic gaps in the genetic analysis of this globally distributed pathogen. Relatively few genetic studies have focused on regions where Bd exhibits low virulence, potentially creating a bias in our current knowledge of the pathogen’s genetic diversity. Disease-associated declines have not been recorded in Texas (USA), yet Bd has been detected on amphibians in the state. These strains have not been isolated and characterized genetically; therefore, we isolated, cultured, and genotyped Bd from central Texas and compared isolates to a panel of previously genotyped strains distributed across the Western Hemisphere. We also isolated other chytrids not known to infect amphibians from east Texas. To identify larval amphibian hosts, we sequenced part of the COI gene. Among 37 Bd isolates from Texas, we detected 19 unique multi-locus genotypes, but found no genetic structure associated with host species, Texas localities, or across North America. Isolates from central Texas exhibit high diversity and genetically cluster with Bd-GPL isolates from the western U.S. that have caused amphibian population declines. This study genetically characterizes isolates of Bd from the south central U.S. and adds to the global knowledge of Bd genotypes.

scholarly journals Composition of symbiotic bacteria predicts survival in Panamanian golden frogs infected with a lethal fungus

2015 ◽  
Vol 282 (1805) ◽  
pp. 20142881 ◽  
Author(s):  
Matthew H. Becker ◽  
Jenifer B. Walke ◽  
Shawna Cikanek ◽  
Anna E. Savage ◽  
Nichole Mattheus ◽  
...  
Keyword(s):  
Batrachochytrium Dendrobatidis ◽  
Population Declines ◽  
Amphibian Species ◽  
Amphibian Population ◽  
New Approach ◽  
Skin Bacteria ◽  
Probiotic Treatment ◽  
Host Health ◽  
The Face ◽  
Inhibitory Bacteria

Symbiotic microbes can dramatically impact host health and fitness, and recent research in a diversity of systems suggests that different symbiont community structures may result in distinct outcomes for the host. In amphibians, some symbiotic skin bacteria produce metabolites that inhibit the growth of Batrachochytrium dendrobatidis (Bd), a cutaneous fungal pathogen that has caused many amphibian population declines and extinctions. Treatment with beneficial bacteria (probiotics) prevents Bd infection in some amphibian species and creates optimism for conservation of species that are highly susceptible to chytridiomycosis, the disease caused by Bd. In a laboratory experiment, we used Bd-inhibitory bacteria from Bd-tolerant Panamanian amphibians in a probiotic development trial with Panamanian golden frogs, Atelopus zeteki , a species currently surviving only in captive assurance colonies. Approximately 30% of infected golden frogs survived Bd exposure by either clearing infection or maintaining low Bd loads, but this was not associated with probiotic treatment. Survival was instead related to initial composition of the skin bacterial community and metabolites present on the skin. These results suggest a strong link between the structure of these symbiotic microbial communities and amphibian host health in the face of Bd exposure and also suggest a new approach for developing amphibian probiotics.

Ecological Traits Predicting Amphibian Population Declines in Central America

2003 ◽  
Vol 17 (4) ◽  
pp. 1078-1088 ◽  
Author(s):  
Karen R. Lips ◽  
John D. Reeve ◽  
Lani R. Witters
Keyword(s):  
Central America ◽  
Population Declines ◽  
Ecological Traits ◽  
Amphibian Population
Sign in / Sign up

Export Citation Format

Share Document