Next Article in Journal
Origin and Domestication of Native Amazonian Crops
Next Article in Special Issue
Phylogenetic Signal of Threatening Processes among Hylids: The Need for Clade-Level Conservation Planning
Previous Article in Journal / Special Issue
Conservation Genetics of Crested Newt Species Triturus cristatus and T. carnifex within a Contact Zone in Central Europe: Impact of Interspecific Introgression and Gene Flow
Diversity 2010, 2(1), 47-71; doi:10.3390/d2010047
Review

Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review

1,*  and 2
Received: 4 November 2009; Accepted: 26 December 2009 / Published: 5 January 2010
(This article belongs to the Special Issue Amphibian Conservation)
Download PDF [280 KB, uploaded 5 January 2010]
Abstract: It is well established that a decrease in genetic variation can lead to reduced fitness and lack of adaptability to a changing environment. Amphibians are declining on a global scale, and we present a four-point argument as to why this taxonomic group seems especially prone to such genetic processes. We elaborate on the extent of recent fragmentation of amphibian gene pools and we propose the term dissociated populations to describe the residual population structure. To put their well-documented loss of genetic diversity into context, we provide an overview of 34 studies (covering 17 amphibian species) that address a link between genetic variation and >20 different fitness traits in amphibians. Although not all results are unequivocal, clear genetic-fitness-correlations (GFCs) are documented in the majority of the published investigations. In light of the threats faced by amphibians, it is of particular concern that the negative effects of various pollutants, pathogens and increased UV-B radiation are magnified in individuals with little genetic variability. Indeed, ongoing loss of genetic variation might be an important underlying factor in global amphibian declines.
Keywords: amphibian conservation; fitness; genetic diversity; genetic drift; inbreeding amphibian conservation; fitness; genetic diversity; genetic drift; inbreeding
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Allentoft, M.E.; O’Brien, J. Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review. Diversity 2010, 2, 47-71.

AMA Style

Allentoft ME, O’Brien J. Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review. Diversity. 2010; 2(1):47-71.

Chicago/Turabian Style

Allentoft, Morten E.; O’Brien, John. 2010. "Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review." Diversity 2, no. 1: 47-71.


Diversity EISSN 1424-2818 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert