@ARTICLE{TreeBASE2Ref21571,
author = {Peter John Unmack and Michael Hammer and Mark Adams and Jerald B. Johnson and Thomas E Dowling},
title = {The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae)},
year = {2013},
keywords = {sea level changes, drainage divides, ESU, phylogeography, introgression, conservation},
doi = {10.1111/mec.12204},
url = {http://onlinelibrary.wiley.com/doi/10.1111/mec.12204/abstract},
pmid = {23398527},
journal = {Molecular Ecology},
volume = {22},
number = {6},
pages = {1683?1699},
abstract = {Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. Southeastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of river coalescence during low sea levels. Our specific hypothesis is that the degree of phylogeographic divergence between coastal river basins should correspond to the continental shelf width of each region. This predicts that genetic divergences between river basins should be lowest in regions with a wider continental shelf and that regions with similar continental shelf width should have similar genetic divergences. Pygmy perches (Nannoperca australis and N. ?flindersi?) in southeastern Australia provide an ideal opportunity to test these biogeographic hypotheses. Phylogeographic patterns were examined based on range wide sampling of 82 populations for cytochrome b and 23 polymorphic allozyme loci. Our results recovered only limited support for our continental shelf width hypothesis, although patterns within Bass clade were largely congruent with reconstructed low sea level drainage patterns. In addition, we identified several instances of drainage divide crossings, typically associated with low elevational differences. Our results demonstrate high levels of genetic heterogeneity with important conservation implications, especially for declining populations in the Murray-Darling Basin and a highly restricted disjunct population in Ansons River, Tasmania.}
}
Citation for Study 13674
Citation title:
"The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae)".
Study name:
"The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae)".
This study is part of submission 13674
(Status: Published).
Citation
Unmack P.J., Hammer M., Adams M., Johnson J., & Dowling T.E. 2013. The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae). Molecular Ecology, 22(6): 1683?1699.
Authors
-
Unmack P.J.
-
Hammer M.
-
Adams M.
-
Johnson J.
-
Dowling T.E.
Abstract
Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. Southeastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of river coalescence during low sea levels. Our specific hypothesis is that the degree of phylogeographic divergence between coastal river basins should correspond to the continental shelf width of each region. This predicts that genetic divergences between river basins should be lowest in regions with a wider continental shelf and that regions with similar continental shelf width should have similar genetic divergences. Pygmy perches (Nannoperca australis and N. ?flindersi?) in southeastern Australia provide an ideal opportunity to test these biogeographic hypotheses. Phylogeographic patterns were examined based on range wide sampling of 82 populations for cytochrome b and 23 polymorphic allozyme loci. Our results recovered only limited support for our continental shelf width hypothesis, although patterns within Bass clade were largely congruent with reconstructed low sea level drainage patterns. In addition, we identified several instances of drainage divide crossings, typically associated with low elevational differences. Our results demonstrate high levels of genetic heterogeneity with important conservation implications, especially for declining populations in the Murray-Darling Basin and a highly restricted disjunct population in Ansons River, Tasmania.
Keywords
sea level changes, drainage divides, ESU, phylogeography, introgression, conservation
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S13674
- Other versions:
Nexus
NeXML
- Show BibTeX reference
@ARTICLE{TreeBASE2Ref21571,
author = {Peter John Unmack and Michael Hammer and Mark Adams and Jerald B. Johnson and Thomas E Dowling},
title = {The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae)},
year = {2013},
keywords = {sea level changes, drainage divides, ESU, phylogeography, introgression, conservation},
doi = {10.1111/mec.12204},
url = {http://onlinelibrary.wiley.com/doi/10.1111/mec.12204/abstract},
pmid = {23398527},
journal = {Molecular Ecology},
volume = {22},
number = {6},
pages = {1683?1699},
abstract = {Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. Southeastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of river coalescence during low sea levels. Our specific hypothesis is that the degree of phylogeographic divergence between coastal river basins should correspond to the continental shelf width of each region. This predicts that genetic divergences between river basins should be lowest in regions with a wider continental shelf and that regions with similar continental shelf width should have similar genetic divergences. Pygmy perches (Nannoperca australis and N. ?flindersi?) in southeastern Australia provide an ideal opportunity to test these biogeographic hypotheses. Phylogeographic patterns were examined based on range wide sampling of 82 populations for cytochrome b and 23 polymorphic allozyme loci. Our results recovered only limited support for our continental shelf width hypothesis, although patterns within Bass clade were largely congruent with reconstructed low sea level drainage patterns. In addition, we identified several instances of drainage divide crossings, typically associated with low elevational differences. Our results demonstrate high levels of genetic heterogeneity with important conservation implications, especially for declining populations in the Murray-Darling Basin and a highly restricted disjunct population in Ansons River, Tasmania.}
}
- Show RIS reference
TY - JOUR
ID - 21571
AU - Unmack,Peter John
AU - Hammer,Michael
AU - Adams,Mark
AU - Johnson,Jerald B.
AU - Dowling,Thomas E
T1 - The Role of Continental Shelf Width in Determining Freshwater Phylogeographic Patterns in Southeastern Australian Pygmy Perches (Teleostei: Percichthyidae)
PY - 2013
KW - sea level changes
KW - drainage divides
KW - ESU
KW - phylogeography
KW - introgression
KW - conservation
UR - http://onlinelibrary.wiley.com/doi/10.1111/mec.12204/abstract
N2 - Biogeographic patterns displayed by obligate freshwater organisms are intimately related to the nature and extent of connectivity between suitable habitats. Two of the more significant barriers to freshwater connections are seawater and major drainage divides. Southeastern Australia provides a contrast between these barriers as it has discrete areas that are likely influenced to a greater or lesser extent by each barrier type. We use continental shelf width as a proxy for the potential degree of river coalescence during low sea levels. Our specific hypothesis is that the degree of phylogeographic divergence between coastal river basins should correspond to the continental shelf width of each region. This predicts that genetic divergences between river basins should be lowest in regions with a wider continental shelf and that regions with similar continental shelf width should have similar genetic divergences. Pygmy perches (Nannoperca australis and N. ?flindersi?) in southeastern Australia provide an ideal opportunity to test these biogeographic hypotheses. Phylogeographic patterns were examined based on range wide sampling of 82 populations for cytochrome b and 23 polymorphic allozyme loci. Our results recovered only limited support for our continental shelf width hypothesis, although patterns within Bass clade were largely congruent with reconstructed low sea level drainage patterns. In addition, we identified several instances of drainage divide crossings, typically associated with low elevational differences. Our results demonstrate high levels of genetic heterogeneity with important conservation implications, especially for declining populations in the Murray-Darling Basin and a highly restricted disjunct population in Ansons River, Tasmania.
L3 - 10.1111/mec.12204
JF - Molecular Ecology
VL - 22
IS - 6
ER -