EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

The role of waterholes as 'refugia' in sustaining genetic diversity and variation of two freshwater species in dryland river systems (Western Queensland, Australia)



The role of waterholes as 'refugia' in sustaining genetic diversity and variation of two freshwater species in dryland river systems (Western Queensland, Australia)



Freshwater Biology 51(8): 34-46



1. Episodic floods and extended low or no flow periods characterise dryland river systems in Western Queensland, Australia. During protracted intervals between floods, rivers consist of a series of isolated waterholes, which serve as 'refugia' for aquatic species and much of the channel is dry. We categorised these waterholes into 'main waterholes', which are located in the main part of the river channel and 'satellite waterholes', which are located in distributary river channels. 2. We used mitochondrial sequences and allozymes to investigate levels of genetic diversity and patterns of connectivity among waterholes for two obligate freshwater species: Macrobrachium australiense (Decapoda: Palaemonidae) and Notopala sublineata (Gastropoda: Viviparidae). 3. We sampled 31 waterholes for M. australiense and 12 for N. sublineata. Based on a 505-bp fragment of cytochrome oxidase subunit I, we identified 54 haplotypes in a sample of 232 individuals for M. australiense and based on a 457-bp fragment of the same gene, 36 haplotypes in a sample of 145 individuals for N. sublineata. 4. Both nuclear and mitochondrial genetic data sets indicated that estimates of genetic diversity were not different in populations inhabiting main and satellite waterholes for either species. Also, there was generally very limited genetic differentiation among populations at any site. 5. We suggest that levels of connectivity among populations inhabiting waterholes at most sites are higher than expected. High levels of connectivity may help to maintain overall high levels of genetic diversity as well as low levels of genetic differentiation among waterholes within sites.

(PDF emailed within 0-6 h: $19.90)

Accession: 018178923

Download citation: RISBibTeXText

DOI: 10.1111/j.1365-2427.2006.01585.x



Related references

Spatial and temporal variation in algal-assemblage structure in isolated dryland river waterholes, Cooper Creek and Warrego River, Australia. ine and Freshwater Research 57(4): 453-466, 2006

Physical and ecological associations in dryland refugia; waterholes of the Cooper Creek, Australia. IAHS-AISH Publication 276(Pages 77-84, 2002

The importance of zooplankton in the diets of three native fish species in floodplain waterholes of a dryland river, the Macintyre River, Australia. Hydrobiologia 614., 2008

Glacial refugia and modern genetic diversity of 22 western North American tree species. Proceedings. Biological Sciences 282(1804): 20142903-20142903, 2015

Persistence of aquatic refugia between flow pulses in a dryland river system (Cooper Creek, Australia). Limnology and Oceanography 50(3): 743-754, 2005

Water and sediment quality of dry season pools in a dryland river system: the upper Leichhardt River, Queensland, Australia. Journal of Environmental Monitoring 13(7): 2050-2061, 2011

Sustaining a grazing enterprise in south-western Queensland, Australia. People and rangelands: building the future Proceedings of the VI International Rangeland Congress, Townsville, Queensland, Australia, 19-23 July, 1999 Volumes 1 and 2: 1037-1039, 1999

Diversity and composition of freshwater fishes in river systems of central Western Ghats, India. Environmental Biology of Fishes ember; 68(1): 25-38, 2003

Genetic diversity and feed quality variation inAcacia saligna, implications for using the species in dryland salinity management. International salinity forum managing saline soils and water: science, technology and social issues Oral Presentation Abstracts, Riverside Convention Center, Riverside, California, USA, 25-28 April 2005: 191-194, 2005

Spatial and temporal variation in fish-assemblage structure in isolated waterholes during the 2001 dry season of an arid-zone floodplain river, Cooper Creek, Australia. ine and Freshwater Research 56(1): 25-35, 2005

Genetic and morphological differences between populations of the western minnow, Galaxias occidentalis, from two river systems in South-western Australia. Marine & Freshwater Research 46(4): 769-777, 1995

Species trials of some acacias in tropical dryland Queensland, Australia. ACIAR Proceedings Series ( 35): 194-200, 1991

Wide variation in virulence and genetic diversity of binucleate Rhizoctonia isolates associated with root rot of strawberry in Western Australia. Plos One 8(2): E55877-E55877, 2013

Higher genetic diversity is associated with stable water refugia for a gecko with a wide distribution in arid Australia. 2013

Seasonal variation and species diversity of fishes in the Neyyar River of the Western Ghats. Journal of the Indian Fisheries Association, 18: 253-260, 1988