Sea-level changes and palaeo-ranges: reconstruction of ancient shorelines and river drainages and the phylogeography of the Australian land crayfish Engaeus sericatus Clark (Decapoda: Parastacidae )

Schultz, Mark B., Ierodiaconou, Daniel A., Smith, Sarah A., Horwitz, Pierre, Richardson, Alastair M.M., Crandall, Keith A. and Austin, Christopher M. 2008, Sea-level changes and palaeo-ranges: reconstruction of ancient shorelines and river drainages and the phylogeography of the Australian land crayfish Engaeus sericatus Clark (Decapoda: Parastacidae ), Molecular ecology, vol. 17, no. 24, pp. 5291-5314.

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Title Sea-level changes and palaeo-ranges: reconstruction of ancient shorelines and river drainages and the phylogeography of the Australian land crayfish Engaeus sericatus Clark (Decapoda: Parastacidae )
Formatted title Sea-level changes and palaeo-ranges: reconstruction of ancient shorelines and river drainages and the phylogeography of the Australian land crayfish Engaeus sericatus Clark (Decapoda: Parastacidae )
Author(s) Schultz, Mark B.
Ierodiaconou, Daniel A.
Smith, Sarah A.
Horwitz, Pierre
Richardson, Alastair M.M.
Crandall, Keith A.
Austin, Christopher M.
Journal name Molecular ecology
Volume number 17
Issue number 24
Start page 5291
End page 5314
Publisher Wiley-Blackwell Publishing Ltd
Place of publication United Kingdom
Publication date 2008-12
ISSN 0962-1083
1365-294X
Keyword(s) freshwater crayfish
Geographical Information Systems (GIS)
historical biogeography
mitochondrial 16S rDNA`
nested clade phylogeographic analysis
palaeodrainages
parastacid
Summary Historical sea levels have been influential in shaping the phylogeography of freshwater-limited taxa via palaeodrainage and palaeoshoreline connections. In this study, we demonstrate an approach to phylogeographic analysis incorporating historical sea-level information in a nested clade phylogeographic analysis (NCPA) framework, using burrowing freshwater crayfish as the model organism. Our study area focuses on the Bass Strait region of southeastern Australia, which is marine region encompassing a shallow seabed that has emerged as a land bridge during glacial cycles connecting mainland Australia and Tasmania. Bathymetric data were analysed using Geographical Information Systems (GIS) to delineate a palaeodrainage model when the palaeocoastline was 150 m below present-day sea level. Such sea levels occurred at least twice in the past 500 000 years, perhaps more often or of larger magnitude within the last 10 million years, linking Victoria and Tasmania. Inter-locality distance measures confined to the palaeodrainage network were incorporated into an NCPA of crayfish (Engaeus sericatus Clark 1936) mitochondrial 16S rDNA haplotypes. The results were then compared to NCPAs using present-day river drainages and traditional great-circle distance measures. NCPA inferences were cross-examined using frequentist and Bayesian procedures in the context of geomorphological and historical sea-level data. We found distribution of present-day genetic variation in E. sericatus to be partly explained not only by connectivity through palaeodrainages but also via present-day drainages or overland (great circle) routes. We recommend that future studies consider all three of these distance measures, especially for studies of coastally distributed species.
Language eng
Field of Research 060302 Biogeography and Phylogeography
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, Blackwell Publishing Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017439

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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