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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

• DOI: 10.1111/mec.12204
• PMID: 23398527
• Other URL: http://onlinelibrary.wiley.com/doi/10.1111/mec.12204/abstract

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  -