Catastrophic Floods May Pave the Way for Increased Genetic Diversity in Endemic Artesian Spring Snail Populations

Wilmer, Jessica Worthington, Murray, Lynde, Elkin, Che, Wilcox, Chris, Niejalke, Darren and Possingham, Hugh (2011) Catastrophic Floods May Pave the Way for Increased Genetic Diversity in Endemic Artesian Spring Snail Populations. PLoS One, 6 12 Article#e28645: . doi:10.1371/journal.pone.0028645


Author Wilmer, Jessica Worthington
Murray, Lynde
Elkin, Che
Wilcox, Chris
Niejalke, Darren
Possingham, Hugh
Title Catastrophic Floods May Pave the Way for Increased Genetic Diversity in Endemic Artesian Spring Snail Populations
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1371/journal.pone.0028645
Open Access Status DOI
Volume 6
Issue 12 Article#e28645
Total pages 14
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2012
Language eng
Formatted abstract
The role of disturbance in the promotion of biological heterogeneity is widely recognised and occurs at a variety of ecological and evolutionary scales. However, within species, the impact of disturbances that decimate populations are neither predicted nor known to result in conditions that promote genetic diversity. Directly examining the population genetic consequences of catastrophic disturbances however, is rarely possible, as it requires both longitudinal genetic data sets and serendipitous timing. Our long-term study of the endemic aquatic invertebrates of the artesian spring ecosystem of arid central Australia has presented such an opportunity. Here we show a catastrophic flood event, which caused a near total population crash in an aquatic snail species (Fonscochlea accepta) endemic to this ecosystem, may have led to enhanced levels of within species genetic diversity. Analyses of individuals sampled and genotyped from the same springs sampled both pre (1988-1990) and post (1995, 2002-2006) a devastating flood event in 1992, revealed significantly higher allelic richness, reduced temporal population structuring and greater effective population sizes in nearly all post flood populations. Our results suggest that the response of individual species to disturbance and severe population bottlenecks is likely to be highly idiosyncratic and may depend on both their ecology (whether they are resilient or resistant to disturbance) and the stability of the environmental conditions (i.e. frequency and intensity of disturbances) in which they have evolved.
Keyword Temporally Spaced Samples
Multilocus Genotype Data
False Discovery Rate
Species-Diversity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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