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Citation for Study 14794

Citation title: "Contrasting demographic histories of two species in the lichen-forming fungal genus Xanthomendoza (Teloschistaceae, Ascomycota)".

Study name: "Contrasting demographic histories of two species in the lichen-forming fungal genus Xanthomendoza (Teloschistaceae, Ascomycota)".

This study is part of submission 14794 (Status: Published).

Citation

Leavitt S., Lumbsch T., & St. clair L.L. 2013. Contrasting demographic histories of two species in the lichen-forming fungal genus Xanthomendoza (Teloschistaceae, Ascomycota). The Bryologist, .

Authors

• Leavitt S. (submitter)
• Lumbsch T. 13126657881
• St. clair L.L.

Abstract

While the distribution and ranges of Arctic plants have been shown to be greatly affected by the advance and retreat of ice sheets, the impact of glacial and interglacial cycles on lichenized fungi remains largely unexplored. In this study we examine the impact of Pleistocene climatic fluctuations on two Xanthomendoza (Teloschistaceae, Ascomycota) species with distinct distribution patterns and reproductive strategies. We selected X. borealis, which occurs in polar regions of both hemispheres, and the corticolous X. montana, which is restricted to montane shrublands in western North America. We analyzed the complete nuclear ribosomal internal transcribed spacer region (nrITS) to confirm the monophyly and relative ages of X. borealis and X. montana. We estimated molecular diversity and population demographics statistics, mismatch distributions, and Bayesian skyline plots for both species. Our data indicate that Xanthomendoza montana experienced a Late Pleistocene population expansion. We suggest that major shifts in vegetation types as a result of Pleistocene climate change had a substantial impact on distribution patterns and the demographic history of X. montana. In contrast, results from this study indicate that the demographic history of X. borealis is consistent with long-term stability, although low genetic variability in the nrITS marker for X. borealis limits overall confidence in this inference. We propose that X. borealis has been able to maintain a stable population size across climatic shifts, likely through effective dispersal to suitable habitats and suggests that climate during Pleistocene glacial cycles was not inherently unfavorable or restrictive for some high altitude/latitude lichen-forming fungal species. Investigating mating systems for these two Xanthomendoza species may provide important insights about the factors affecting population demographics and reproduction in lichen-forming fungi in general.

Keywords

Bayesian skyline plot, climate change, mismatch distribution, North America, polar, refugia, shrublands

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S14794
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref22443,
  	 author = {Steve  Leavitt and Thorsten  Lumbsch and Larry L. St. Clair},
  	 title = {Contrasting demographic histories of two species in the lichen-forming fungal genus Xanthomendoza (Teloschistaceae, Ascomycota)},
  	 year = {2013},
  	 keywords = {Bayesian skyline plot, climate change, mismatch distribution, North America, polar, refugia, shrublands},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {The Bryologist},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {While the distribution and ranges of Arctic plants have been shown to be greatly affected by the advance and retreat of ice sheets, the impact of glacial and interglacial cycles on lichenized fungi remains largely unexplored. In this study we examine the impact of Pleistocene climatic fluctuations on two Xanthomendoza (Teloschistaceae, Ascomycota) species with distinct distribution patterns and reproductive strategies. We selected X. borealis, which occurs in polar regions of both hemispheres, and the corticolous X. montana, which is restricted to montane shrublands in western North America. We analyzed the complete nuclear ribosomal internal transcribed spacer region (nrITS) to confirm the monophyly and relative ages of X. borealis and X. montana. We estimated molecular diversity and population demographics statistics, mismatch distributions, and Bayesian skyline plots for both species. Our data indicate that Xanthomendoza montana experienced a Late Pleistocene population expansion. We suggest that major shifts in vegetation types as a result of Pleistocene climate change had a substantial impact on distribution patterns and the demographic history of X. montana. In contrast, results from this study indicate that the demographic history of X. borealis is consistent with long-term stability, although low genetic variability in the nrITS marker for X. borealis limits overall confidence in this inference. We propose that X. borealis has been able to maintain a stable population size across climatic shifts, likely through effective dispersal to suitable habitats and suggests that climate during Pleistocene glacial cycles was not inherently unfavorable or restrictive for some high altitude/latitude lichen-forming fungal species. Investigating mating systems for these two Xanthomendoza species may provide important insights about the factors affecting population demographics and reproduction in lichen-forming fungi in general.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 22443
  AU  - Leavitt,Steve 
  AU  - Lumbsch,Thorsten 
  AU  - St. Clair,Larry L.
  T1  - Contrasting demographic histories of two species in the lichen-forming fungal genus Xanthomendoza (Teloschistaceae, Ascomycota)
  PY  - 2013
  KW  - Bayesian skyline plot
  KW  - climate change
  KW  - mismatch distribution
  KW  - North America
  KW  - polar
  KW  - refugia
  KW  - shrublands
  UR  - http://dx.doi.org/
  N2  - While the distribution and ranges of Arctic plants have been shown to be greatly affected by the advance and retreat of ice sheets, the impact of glacial and interglacial cycles on lichenized fungi remains largely unexplored. In this study we examine the impact of Pleistocene climatic fluctuations on two Xanthomendoza (Teloschistaceae, Ascomycota) species with distinct distribution patterns and reproductive strategies. We selected X. borealis, which occurs in polar regions of both hemispheres, and the corticolous X. montana, which is restricted to montane shrublands in western North America. We analyzed the complete nuclear ribosomal internal transcribed spacer region (nrITS) to confirm the monophyly and relative ages of X. borealis and X. montana. We estimated molecular diversity and population demographics statistics, mismatch distributions, and Bayesian skyline plots for both species. Our data indicate that Xanthomendoza montana experienced a Late Pleistocene population expansion. We suggest that major shifts in vegetation types as a result of Pleistocene climate change had a substantial impact on distribution patterns and the demographic history of X. montana. In contrast, results from this study indicate that the demographic history of X. borealis is consistent with long-term stability, although low genetic variability in the nrITS marker for X. borealis limits overall confidence in this inference. We propose that X. borealis has been able to maintain a stable population size across climatic shifts, likely through effective dispersal to suitable habitats and suggests that climate during Pleistocene glacial cycles was not inherently unfavorable or restrictive for some high altitude/latitude lichen-forming fungal species. Investigating mating systems for these two Xanthomendoza species may provide important insights about the factors affecting population demographics and reproduction in lichen-forming fungi in general.
  L3  - 
  JF  - The Bryologist
  VL  - 
  IS  - 
  ER  -