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Citation for Study 12065

Citation title: "Phylogeography of the catfish Hatcheria macraei reveals a negligible role of drainage divides in structuring populations.".

Study name: "Phylogeography of the catfish Hatcheria macraei reveals a negligible role of drainage divides in structuring populations.".

This study is part of submission 12065 (Status: Published).

Citation

Unmack P.J., Barriga J.P., Battini M.A., Habit E.M., & Johnson J. 2012. Phylogeography of the catfish Hatcheria macraei reveals a negligible role of drainage divides in structuring populations. Molecular Ecology, 21(4): 942?959.

Authors

• Unmack P.J. (submitter) 919 668-9107
• Barriga J.P.
• Battini M.A.
• Habit E.M.
• Johnson J.

Abstract

Southern South America provides a set of unusual geographic features that make it particularly interesting for studying phylogeography. The Andes Mountains run along a north-to-south axis and act as a barrier to gene flow for much of the biota of this region, with southern portions experiencing extensive historic glaciation. Geological data reveal a series of drainage reversals, shifting from Pacific Ocean outlets to Atlantic Ocean outlets due to glacier formation that dammed and reversed rivers. Once glaciers melted around 13 000 years ago, drainages returned to the Pacific Ocean. This geologic history predicts that aquatic organisms in Pacific rivers should have their closest relationships to their counterparts in Atlantic rivers immediately to their east. We tested this prediction in the trichomycterid catfish Hatcheria macraei from 38 locations using the mitochondrial cytochrome b gene. Our results show that most populations found in Pacific rivers were closely related to fish found in the adjacent Atlantic draining R?o Chubut. Surprisingly, one documented drainage reversal (from R?o Deseado into R?o Baker) did not result in movement of H. macraei. Overall, we found the lowest levels of genetic structure between most Pacific rivers that are adjacent to the Atlantic draining R?o Chubut. We also found low levels of population structuring among three out of four river basins that drain to the Atlantic Ocean. Our findings suggest that drainage basin boundaries have historically not played an important long-term role in structuring between nine out of 11 drainages, an unusual finding in freshwater biogeography.

Keywords

Andes Mountains ? Biogeography ? Cytochrome b ? Glaciation ? Trichomycteridae ? Drainage reversal ? Introgression

External links

• DOI: 10.1111/j.1365-294X.2011.05408.x
• PMID: 222113
• Other URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-294X.2011.05408.x/citedby

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S12065
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref20169,
  	 author = {Peter John Unmack and Juan P. Barriga and Miguel A. Battini and Evelyn M. Habit and Jerald B.  Johnson},
  	 title = {Phylogeography of the catfish Hatcheria macraei reveals a negligible role of drainage divides in structuring populations.},
  	 year = {2012},
  	 keywords = {Andes Mountains ? Biogeography ? Cytochrome b ? Glaciation ? Trichomycteridae ? Drainage reversal ? Introgression},
  	 doi = {10.1111/j.1365-294X.2011.05408.x},
  	 url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1365-294X.2011.05408.x/citedby},
  	 pmid = {222113},
  	 journal = {Molecular Ecology},
  	 volume = {21},
  	 number = {4},
  	 pages = {942?959},
  	 abstract = {Southern South America provides a set of unusual geographic features that make it particularly interesting for studying phylogeography.  The Andes Mountains run along a north-to-south axis and act as a barrier to gene flow for much of the biota of this region, with southern portions experiencing extensive historic glaciation.  Geological data reveal a series of drainage reversals, shifting from Pacific Ocean outlets to Atlantic Ocean outlets due to glacier formation that dammed and reversed rivers.  Once glaciers melted around 13 000 years ago, drainages returned to the Pacific Ocean.  This geologic history predicts that aquatic organisms in Pacific rivers should have their closest relationships to their counterparts in Atlantic rivers immediately to their east.  We tested this prediction in the trichomycterid catfish Hatcheria macraei from 38 locations using the mitochondrial cytochrome b gene.  Our results show that most populations found in Pacific rivers were closely related to fish found in the adjacent Atlantic draining R?o Chubut.  Surprisingly, one documented drainage reversal (from R?o Deseado into R?o Baker) did not result in movement of H. macraei.  Overall, we found the lowest levels of genetic structure between most Pacific rivers that are adjacent to the Atlantic draining R?o Chubut.  We also found low levels of population structuring among three out of four river basins that drain to the Atlantic Ocean.  Our findings suggest that drainage basin boundaries have historically not played an important long-term role in structuring between nine out of 11 drainages, an unusual finding in freshwater biogeography.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 20169
  AU  - Unmack,Peter John
  AU  - Barriga,Juan P.
  AU  - Battini,Miguel A.
  AU  - Habit,Evelyn M.
  AU  - Johnson,Jerald B. 
  T1  - Phylogeography of the catfish Hatcheria macraei reveals a negligible role of drainage divides in structuring populations.
  PY  - 2012
  KW  - Andes Mountains ? Biogeography ? Cytochrome b ? Glaciation ? Trichomycteridae ? Drainage reversal ? Introgression
  UR  - http://onlinelibrary.wiley.com/doi/10.1111/j.1365-294X.2011.05408.x/citedby
  N2  - Southern South America provides a set of unusual geographic features that make it particularly interesting for studying phylogeography.  The Andes Mountains run along a north-to-south axis and act as a barrier to gene flow for much of the biota of this region, with southern portions experiencing extensive historic glaciation.  Geological data reveal a series of drainage reversals, shifting from Pacific Ocean outlets to Atlantic Ocean outlets due to glacier formation that dammed and reversed rivers.  Once glaciers melted around 13 000 years ago, drainages returned to the Pacific Ocean.  This geologic history predicts that aquatic organisms in Pacific rivers should have their closest relationships to their counterparts in Atlantic rivers immediately to their east.  We tested this prediction in the trichomycterid catfish Hatcheria macraei from 38 locations using the mitochondrial cytochrome b gene.  Our results show that most populations found in Pacific rivers were closely related to fish found in the adjacent Atlantic draining R?o Chubut.  Surprisingly, one documented drainage reversal (from R?o Deseado into R?o Baker) did not result in movement of H. macraei.  Overall, we found the lowest levels of genetic structure between most Pacific rivers that are adjacent to the Atlantic draining R?o Chubut.  We also found low levels of population structuring among three out of four river basins that drain to the Atlantic Ocean.  Our findings suggest that drainage basin boundaries have historically not played an important long-term role in structuring between nine out of 11 drainages, an unusual finding in freshwater biogeography.
  L3  - 10.1111/j.1365-294X.2011.05408.x
  JF  - Molecular Ecology
  VL  - 21
  IS  - 4
  ER  -