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Geographic, climatic, and chemical differentiation in the Hypogymnia imshaugii species complex (Lecanoromycetes, Parmeliaceae) in North America

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dc.creator McCune, Bruce
dc.creator Schoch, Conrad
dc.creator Root, Heather T.
dc.creator Kageyama, Stacie A.
dc.creator Miadlikowska, Jolanta
dc.date.accessioned 2012-11-01T16:45:47Z
dc.date.available 2012-11-01T16:45:47Z
dc.date.issued 2011
dc.identifier.citation McCune, B., Schoch, C., Root, H. T., Kageyama, S. A., & Miadlikowska, J. (2011). Geographic, climatic, and chemical differentiation in the hypogymnia imshaugii species complex (lecanoromycetes, parmeliaceae) in north america. The Bryologist, 114(3), 526-544. doi: 10.1639/0007-2745-114.3.526 en_US
dc.identifier.uri http://hdl.handle.net/1957/34727
dc.description This is the publisher’s final pdf. The published article is copyrighted by The American Bryological and Lichenological Society, Inc. and can be found at: http://www.abls.org/. en_US
dc.description.abstract Hypogymnia imshaugii is one of the most common, conspicuous and morphologically variable epiphytic lichens of the Pacific coastal states and provinces. The species varies greatly in morphology and chemistry, suggesting multiple closely related species or one or more phenotypically plastic species. We sought to determine whether additional ecologically meaningful species might be present within the H. imshaugii complex. Improving our species concepts could potentially improve ecological inferences based on community sampling. Three relatively well-defined genetic groups and one residual group in the H. imshaugii complex were detected with haplotype networks based on the ITS locus; however, phylogenetic reconstructions on combined ITS, mtSSU, GPD1 and TEF1 loci did not reflect this pattern. At present, we have insufficient evidence to support defining any of these groups as new taxa. The four major chemotypes in H. imshaugii differed in frequency among the genetic groups. None of the genetic groups was, however, qualitatively uniform in chemotype. Only one chemotype occurred in a single genetic group, but several chemotypes occurred in that group. While broadly sympatric, each chemotype had a distinct geographic distribution, and each chemotype showed its own relationship to climate, as shown by regression of occurrences of chemotypes against climatic variables. The genetic variation detected within H. imshaugii did not correspond to geographic variation in morphology, chemistry, or climate. Within the broader H. imshaugii complex, we recommend treating H. amplexa as a synonym of H. imshaugii unless it can be more distinctly separated from the clinal variation in morphology, chemistry, or DNA sequences. In contrast to H. amplexa, however, H. inactiva and H. gracilis are both easily separated morphologically from H. imshaugii and do not intergrade with it. en_US
dc.description.sponsorship This work was funded in part by a cooperative agreement with the USDA Forest Service, Portland, Oregon and by NSF Assembling the Tree of Life (ATOL) award DEB-0228668 to JM. en_US
dc.language.iso en_US en_US
dc.publisher American Bryological and Lichenological Society, Inc. en_US
dc.relation.ispartofseries The Bryologist en_US
dc.relation.ispartofseries Vol. 114 no. 3 en_US
dc.subject Chemotypes en_US
dc.subject DNA sequences en_US
dc.subject Hypogymnia amplexa en_US
dc.subject Lichenized ascomycetes en_US
dc.subject Lichen substances en_US
dc.subject Nonparametric multiplicative regression en_US
dc.subject Parmeliaceae en_US
dc.title Geographic, climatic, and chemical differentiation in the Hypogymnia imshaugii species complex (Lecanoromycetes, Parmeliaceae) in North America en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1639/0007-2745-114.3.526


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