Index Catalog // ScholarsArchive@OSU

Risk of Exposure to Eastern Equine Encephalomyelitis Virus Increases with the Density of Northern Cardinals

Creator:: Estep, Laura K., McClure, Christopher J. W., Vander Kelen, Patrick, Burkett-Cadena, Nathan D., Sickerman, Stephen, Hernandez, José, Jinright, Joseph, Hunt, Brenda, Lusk, John, Hoover, Victor, Armstrong, Keith, Stark, Lillian M., Hill, Geoffrey E., and Unnasch, Thomas R.
Abstract:: For a variety of infectious diseases, the richness of the community of potential host species has emerged as an important factor in pathogen transmission, whereby a higher richness of host species is associated with a lowered disease risk. The proposed mechanism driving this pattern is an increased likelihood in species-rich...
Resource Type:: Article
Full Text:: . McClure2, Patrick Vander Kelen3, Nathan D. Burkett-Cadena3, Stephen Sickerman4, José Hernandez4, Joseph

Diversity of ancient conifers: The jurassic seed cone bancroftiastrobus digitata gen. et sp. nov. (coniferales)

Creator:: Rothwell, Gar W., Mapes, Gene, Stockey, Ruth A., and Hilton, Jason
Abstract:: Premise of research. A third genus of anatomically preserved conifer seed cones has been recognized from a Late Jurassic deposit in northeastern Scotland. This cone is described as Bancroftiastrobus digitata Rothwell, Mapes, Stockey et Hilton. Methodology. The cone was sectioned with the classic coal ball peel technique and studied and...
Resource Type:: Article
Full Text:: ancient extinct species of conifer plants (Hernandez-Castillo 2005; Rothwell et al. 2005). Organismal and

Pararaucaria carrii sp nov., anatomically preserved evidence for the conifer family cheirolepidiaceae in the northern hemisphere

Creator:: Stockey, Ruth A. and Rothwell, Gar W.
Abstract:: A cylindrical permineralized conifer seed cone has been identified from the Officer Member of the Trowbridge Formation, near Izee, in east-central Oregon. The cone is preserved in a Middle Jurassic (Callovian) marine calcium carbonate concretion, associated with araucarian seed cones, conifer twigs and wood, cycad seeds, fern rachides, and lycopodialean...
Resource Type:: Article
Full Text:: processed using Adobe Photoshop, version CS5 (San Jose, CA). Systematic Description Order—Coniferales

The Role of Plant-soil Feedback in the Invasion of Brachypodium sylvaticum in Douglas-fir Forests

Creator:: Esterson, Andrew
Abstract:: Invasive plants have the capacity to transform landscapes and alter ecosystem function, causing significant economic and ecological damage. These effects include displacement and reduction of native flora and fauna, altered fire regimes, modification of biotic and abiotic soil properties, as well as local, regional, and global economic impacts. With such...
Resource Type:: Masters Thesis
Full Text:: and Composition of Invaded Communities.” Journal of Ecology 97 (3): 393–403. Hierro, José L

The Seed Cone Eathiestrobus gen. nov.: Fossil Evidence for a Jurassic Origin of Pinaceae

Creator:: Rothwell, Gar W., Mapes, Gene, Stockey, Ruth A., and Hilton, Jason
Abstract:: Premise of the study: Pinaceae and nonpinoid species are sister groups within the conifer clade as inferred from molecular systematic comparisons of living species and therefore should have comparable geological ages. However, the fossil record for the nonpinoid lineage of extant conifer families is Triassic, nearly 100 million years older...
Resource Type:: Article
Full Text:: , Frederiksberg, Denmark) digital scan- ning cameras and processed with Adobe Photoshop (San Jose, California

Symbiosis in the Pacific Ring of Fire : evolutionary-biology of Rhizopogon subgenus Villosuli as mutualists of Pseudotsuga

Creator:: Mujic, Alija Bajro
Abstract:: Rhizopogon is a large genus of ectomycorrhizal (EM) fungi that grows in association with host trees of the family Pinaceae. We have conducted a series of studies investigating the ecology and evolutionary biology of the EM symbiosis shared between R. subgenus Villosuli and trees of the genus Pseudotsuga. Two members...
Resource Type:: Dissertation
Full Text:: depression (Vargas-Hernández et al. 2004, Mápula-larreta et al. 2007, Velasco-García et al. 2007

Differential Effects of First Year Wheat Genotype on the Suppression of Take-All Disease and the Establishment of Suppressive Microbial Agents in the Rhizosphere

Creator:: Perkins, Evan M.
Abstract:: Recent research in the UK has found that the wheat cultivar grown in the first year can have a significant impact on the amount of take-all that develops in the second year, regardless of the cultivar planted in year two. ‘Einstein’ is one such cultivar that reduces take-all disease (reduced...
Resource Type:: Masters Thesis
Full Text:: , which may explain their increased virulence when compared to other G. graminis strains (Hernández

Permineralized Mesozoic Moss Gametophytes and their Implications for Bryophyte Evolution

Creator:: Bippus, Alexander C.
Abstract:: Mosses (Phylum Bryophyta) are widely considered to be among the most ancient groups of land plants (embryophytes) and they are the second most speciose embryophyte phylum with ~13,000 extant species. Despite their diversity and antiquity, mosses have a limited fossil record, which primarily consists of gametophytes entombed in Cenozoic amber....
Resource Type:: Dissertation

Unearthing the Cretaceous Diversification of Cornales

Creator:: Atkinson, Brian A.
Abstract:: The order Cornales (dogwoods) is the earliest diverging lineage within the most diverse group of flowering plants, the asterids (>80,000 species). Although molecular phylogenetics have significantly improved our understanding of cornalean systematics, early phylogenetic relationships remain uncertain due to an initial rapid radiation. The fossil record of Cornales is extensive...
Resource Type:: Dissertation

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

Creator:: Klymiuk, Ashley A. and Stockey, Ruth A.
Abstract:: Premise of study: Sequence analyses for Pinaceae have suggested that extant genera diverged in the late Mesozoic. While the fossil record indicates that Pinaceae was highly diverse during the Cretaceous, there are few records of living genera. This description of an anatomically preserved seed cone extends the fossil record for...
Resource Type:: Article
Full Text:: Adobe (San Jose, California, USA) Photoshop CS3. Phylogenetic analyses — Analyses comparing the

ScholarsArchive@OSU

Risk of Exposure to Eastern Equine Encephalomyelitis Virus Increases with the Density of Northern Cardinals

Diversity of ancient conifers: The jurassic seed cone bancroftiastrobus digitata gen. et sp. nov. (coniferales)

Pararaucaria carrii sp nov., anatomically preserved evidence for the conifer family cheirolepidiaceae in the northern hemisphere

The Role of Plant-soil Feedback in the Invasion of Brachypodium sylvaticum in Douglas-fir Forests

The Seed Cone Eathiestrobus gen. nov.: Fossil Evidence for a Jurassic Origin of Pinaceae

Symbiosis in the Pacific Ring of Fire : evolutionary-biology of Rhizopogon subgenus Villosuli as mutualists of Pseudotsuga

Differential Effects of First Year Wheat Genotype on the Suppression of Take-All Disease and the Establishment of Suppressive Microbial Agents in the Rhizosphere

Permineralized Mesozoic Moss Gametophytes and their Implications for Bryophyte Evolution

Unearthing the Cretaceous Diversification of Cornales

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

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