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Catastrophic floods may pave the way for increased genetic diversity in endemic artesian spring snail populations


Wilmer, JW and Murray, L and Elkin, C and Wilcox, C and Neijalke, D and Possingham, H, Catastrophic floods may pave the way for increased genetic diversity in endemic artesian spring snail populations, PLoS ONE, 6, (12) Article e28645. ISSN 1932-6203 (2011) [Refereed Article]


Copyright Statement

Copyright 2011 Worthington Wilmer et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1371/journal.pone.0028645


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.

Item Details

Item Type:Refereed Article
Keywords:genomic DNA, aquatic environment, Australia, bottleneck population
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community ecology (excl. invasive species ecology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Wilcox, C (Dr Chris Wilcox)
ID Code:119692
Year Published:2011
Web of Science® Times Cited:17
Deposited By:Ecology and Biodiversity
Deposited On:2017-08-03
Last Modified:2017-09-20
Downloads:125 View Download Statistics

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