A taxonomic revision of the Hypotrachyna subgenus Parmelinopsis in eastern North America is presented based on molecular phylogenetic analyses of ITS and mtSSU data, extensive field observation and analyses of chemical and morphological data. Each species is described, illustrated with photographs, and the distribution in the region is mapped. An identification key is also presented. Eleven species are recognized: H. afrorevoluta, H. appalachensis, H. britannica, H. cryptochlora, H. horrescens, H. kauffmaniana, H. minarum, H. mcmulliniana,...
PREMISE OF THE STUDY: Species formation is an intuitive endpoint of reproductive isolation, but circumscribing taxa that arise during speciation can be difficult because of gene flow, morphological continuity, hybridization or polyploidization, and low sequence variation among newly diverged lineages. Nonetheless, species complexes are ubiquitous and their classification is essential for understanding how diversity influences ecosystem function. METHODS: We used modern sequencing technology to identify lineages of perennial Claytonia L., and assessed correspondence between genetic...
Originally described from a single collection in northern California, Umbilicaria phaea var. coccinea has since been reported from additional sites in California, Oregon, and Washington. Although relatively rare in all three states, there is currently no conservation status for U. phaea var. coccinea in California. Developing conservation strategies and status ranks requires a sound understanding of distribution, frequency, habitat requirements, and taxonomic placement. Therefore, we evaluated distributions and constructed climate envelope models for both varieties...
Data from: The Red Death meets the abdominal bristle: polygenic mutation for susceptibility to a bacterial pathogen in Caenorhabditis elegansVeronique Etienne, Erik C. Andersen, José Miguel Ponciano, Dustin Blanton, Analucia Cadavid, Joanna Joyner-Matos, Chikako Matsuba, Brandon Tabman & Charles F. Baer
Understanding the genetic basis of susceptibility to pathogens is an important goal of medicine and of evolutionary biology. A key first step toward understanding the genetics and evolution of any phenotypic trait is characterizing the role of mutation. However, the rate at which mutation introduces genetic variance for pathogen susceptibility in any organism is essentially unknown. Here we quantify the per-generation input of genetic variance by mutation (VM) for susceptibility of Caenorhabditis elegans to the...
The Colville Confederated Tribes (CCT) is a large reservation (1.4 million acres) the size of Connecticut with slightly under 10,000 enrolled tribal members in 2021. Six small towns, rural HUD subdivisions and isolated homes create severe problems for access to transportation, especially for elderly, youth, economically distressed, and physically challenged populations. The design and operation of tribal transit on reservations represents a new phase in tribal transportation since 2008. In the rush to create transit...
Population genetics and biogeography of the lungwort lichen in North America support distinct Eastern and Western gene poolsJessica Allen, R. Troy McMullin, Yolanda F. Wiersma & Christoph Scheidegger
Populations of species with large spatial distributions are shaped by complex forces that differ throughout their ranges. To maintain the genetic diversity of species, genepool-based subsets of widespread species must be considered in conservation assessments. In this study, the population genetics of the lichenized fungus Lobaria pulmonaria and its algal partner, Symbiochloris reticulata , were investigated to determine population structure, genetic diversity, and degree of congruency in eastern and western North America. Data loggers measuring...
Eastern Washington University6
University of Oviedo1
Plymouth State University1
University of Wisconsin-Madison1
Canadian Museum of Nature1
University of Florida1
New York Botanical Garden1
Swiss Federal Institute for Forest, Snow and Landscape Research1
Memorial University of Newfoundland1