Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits

Abstract Using species distribution models and information on genetic structure and within-population variance observed in a series of common garden trials, we reconstructed a historical biogeography of trembling aspen in North America. We used an ensemble classifier modelling approach (RandomForest...

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Autores principales:	Chen Ding, Stefan G. Schreiber, David R. Roberts, Andreas Hamann, Jean S. Brouard
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b186e79bef3f4da588d9c9acc8739b2f
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spelling	oai:doaj.org-article:b186e79bef3f4da588d9c9acc8739b2f2021-12-02T15:05:53ZPost-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits10.1038/s41598-017-04871-72045-2322https://doaj.org/article/b186e79bef3f4da588d9c9acc8739b2f2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04871-7https://doaj.org/toc/2045-2322Abstract Using species distribution models and information on genetic structure and within-population variance observed in a series of common garden trials, we reconstructed a historical biogeography of trembling aspen in North America. We used an ensemble classifier modelling approach (RandomForest) to reconstruct palaeoclimatic habitat for the periods 21,000, 14,000, 11,000 and 6,000 years before present. Genetic structure and diversity in quantitative traits was evaluated in common garden trials with 43 aspen collections ranging from Minnesota to northern British Columbia. Our main goals were to examine potential recolonisation routes for aspen from southwestern, eastern and Beringian glacial refugia. We further examined if any refugium had stable habitat conditions where aspen clones may have survived multiple glaciations. Our palaeoclimatic habitat reconstructions indicate that aspen may have recolonised boreal Canada and Alaska from refugia in the eastern United States, with separate southwestern refugia for the Rocky Mountain regions. This is further supported by a southeast to northwest gradient of decreasing genetic variance in quantitative traits, a likely result of repeated founder effects. Stable habitat where aspen clones may have survived multiple glaciations was predicted in Mexico and the eastern United States, but not in the west where some of the largest aspen clones have been documented.Chen DingStefan G. SchreiberDavid R. RobertsAndreas HamannJean S. BrouardNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chen Ding Stefan G. Schreiber David R. Roberts Andreas Hamann Jean S. Brouard Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
description	Abstract Using species distribution models and information on genetic structure and within-population variance observed in a series of common garden trials, we reconstructed a historical biogeography of trembling aspen in North America. We used an ensemble classifier modelling approach (RandomForest) to reconstruct palaeoclimatic habitat for the periods 21,000, 14,000, 11,000 and 6,000 years before present. Genetic structure and diversity in quantitative traits was evaluated in common garden trials with 43 aspen collections ranging from Minnesota to northern British Columbia. Our main goals were to examine potential recolonisation routes for aspen from southwestern, eastern and Beringian glacial refugia. We further examined if any refugium had stable habitat conditions where aspen clones may have survived multiple glaciations. Our palaeoclimatic habitat reconstructions indicate that aspen may have recolonised boreal Canada and Alaska from refugia in the eastern United States, with separate southwestern refugia for the Rocky Mountain regions. This is further supported by a southeast to northwest gradient of decreasing genetic variance in quantitative traits, a likely result of repeated founder effects. Stable habitat where aspen clones may have survived multiple glaciations was predicted in Mexico and the eastern United States, but not in the west where some of the largest aspen clones have been documented.
format	article
author	Chen Ding Stefan G. Schreiber David R. Roberts Andreas Hamann Jean S. Brouard
author_facet	Chen Ding Stefan G. Schreiber David R. Roberts Andreas Hamann Jean S. Brouard
author_sort	Chen Ding
title	Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
title_short	Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
title_full	Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
title_fullStr	Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
title_full_unstemmed	Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
title_sort	post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b186e79bef3f4da588d9c9acc8739b2f
work_keys_str_mv	AT chending postglacialbiogeographyoftremblingaspeninferredfromhabitatmodelsandgeneticvarianceinquantitativetraits AT stefangschreiber postglacialbiogeographyoftremblingaspeninferredfromhabitatmodelsandgeneticvarianceinquantitativetraits AT davidrroberts postglacialbiogeographyoftremblingaspeninferredfromhabitatmodelsandgeneticvarianceinquantitativetraits AT andreashamann postglacialbiogeographyoftremblingaspeninferredfromhabitatmodelsandgeneticvarianceinquantitativetraits AT jeansbrouard postglacialbiogeographyoftremblingaspeninferredfromhabitatmodelsandgeneticvarianceinquantitativetraits
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Post-glacial biogeography of trembling aspen inferred from habitat models and genetic variance in quantitative traits

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