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Full-Text Articles in Biology
Foraging Strategies Are Related To Skull Morphology And Life History Traits Of Melanerpes Woodpeckers, David L. Leonard Jr., Julie A. Heath
Foraging Strategies Are Related To Skull Morphology And Life History Traits Of Melanerpes Woodpeckers, David L. Leonard Jr., Julie A. Heath
Biology Faculty Publications and Presentations
Links between morphology and foraging strategies have been well established for many vertebrate groups. Foraging strategies of Melanerpes woodpeckers are especially variable, with at least six species being proficient flycatchers; the remainder of the better known species do not flycatch. Our objective was to examine variation in foraging tactics as it relates to skull morphology and other life history traits among these species to better understand the biology of these diverse woodpeckers. We measured eight skull characters from 241 individuals representing 19 species, but focused on eight species for which we had the most data. We used the log-geometric mean …
Evolutionary History And Taxonomy Of The Cuscuta Umbellata Complex (Convolvulaceae): Evidence Of Extensive Hybridization From Discordant Nuclear And Plastid Phylogenies, Mihai Costea, Saša Stefanović
Evolutionary History And Taxonomy Of The Cuscuta Umbellata Complex (Convolvulaceae): Evidence Of Extensive Hybridization From Discordant Nuclear And Plastid Phylogenies, Mihai Costea, Saša Stefanović
Biology Faculty Publications
The Cuscuta umbellata complex is one of the 15 major clades recently circumscribed in C. subg. Grammica. Most of its members occur in North AMerican and the Caribbean (C. desmouliniana, C. lacerata, C. lacerata, C. leptantha, C. liliputana, C. odontolepsis, C. polyanthemos, C. tuberculata, C. umbellata), but three species (C. acuta, C. membranacea, C. umbellata) grow in South America, and one (C. hyalina) is found as a native species in India, Pakistan and Eastern to South Africa. Basic morphology, scanning electron microscopy and …
Infrageneric Relationships Within Collomia (Polemoniaceae), Eric Stewart Green
Infrageneric Relationships Within Collomia (Polemoniaceae), Eric Stewart Green
Theses and Dissertations
Traditional evolutionary models depict evolution as a bifurcating pattern with a single ancestor diverging to form two lineages. However, reticulate species resulting from hybridization and recombination have unique histories shared with two independent lineages, not one. Accounting for the genetic histories of reticulate species increases the power and ability to recover biologically meaningful relationships. The genus Collomia (Polemoniaceae) is used to explore issues of reticulation and the importance of accounting for gene histories in a phylogenetic analysis. The issue of reticulation within species trees is discussed with a multilabeled, network approach being explored to better represent the genus's evolutionary history. …
Taxonomy And Applied Biogeography Of Mongolian Stoneflies (Insecta: Plecoptera), Sarah Walker Judson
Taxonomy And Applied Biogeography Of Mongolian Stoneflies (Insecta: Plecoptera), Sarah Walker Judson
Theses and Dissertations
Since the early 1900s, efforts have been made to catalogue the stoneflies of Mongolia. Taxonomic work from 1960 to 1980 greatly expanded basic lists of stoneflies in Mongolia, but no comprehensive survey or synthesis of this dispersed literature has been completed. In conjunction with a modern survey of the aquatic insects of Mongolia, we collected Plecoptera on a series of expeditions to the Selenge (north) and Altai (west) regions of Mongolia. A total of 48 species distributed in 24 genera and 8 families were documented, including 3 of the 5 Mongolian endemics, 2 new species records for Mongolia, and 1 …
Determination Of The Relationship Between Some Centaurea Species Based On Sds-Page, Tuna Uysal, Emi̇ne Arslan, Osman Tugay, Kuddi̇si̇ Ertuğrul
Determination Of The Relationship Between Some Centaurea Species Based On Sds-Page, Tuna Uysal, Emi̇ne Arslan, Osman Tugay, Kuddi̇si̇ Ertuğrul
Turkish Journal of Biology
The protein patterns of 47 Centaurea species from Turkey were obtained using SDS-PAGE methods. Relationships between Centaurea species and related genera were evaluated via use of a dendrogram. SDS-PAGE provided protein profiles for an important and applicable selection within Centaurea, particularly for the section Cheirolepis and its relatives. We determined that the technique could be used to resolve taxonomic and evolutionary problems in the genus Centaurea, as most of the Centaurea species studied exhibited special protein profiles and patterns.
Teaching Species, Mark W. Ellis, Paul G. Wolf
Teaching Species, Mark W. Ellis, Paul G. Wolf
Biology Faculty Publications
A clear understanding of the term "species" is fundamental to the subject of evolution. However, introductory textbooks often fail to address this topic until one of the later chapters, after having used the term species in all preceding chapters. Furthermore, definitions of terms critical to a clear understanding of this subject are often vague or absent in chapters on species concepts. We feel the popular notion of a "species problem" has been unnecessarily inflated by this less-than-effective educational approach. Clearly addressing this essential subject at the beginning of a course on evolution will prepare students to learn the details and …
Molecular Fingerprinting Of Some Clinically Significant Nocardia And Related Strains By Restriction Polymorphism Ribosomal Rna Analyses, Kami̇l Işik, Michael Goodfellow
Molecular Fingerprinting Of Some Clinically Significant Nocardia And Related Strains By Restriction Polymorphism Ribosomal Rna Analyses, Kami̇l Işik, Michael Goodfellow
Turkish Journal of Biology
Fifty-three Nocardia strains were the subject of a restriction polymorphic ribosomal RNA analysis (ribotyping) designed to distinguish between representatives of clinically significant species and related strains. The organisms were assigned to 19 groups using a combination of EcoRV gene restriction endonuclease patterns and a digoxigenin-labelled Streptomyces violaceoruber TK21 rDNA probe. Each ribotype group contained 4 to 13 restriction fragments that ranged in size from 20.7 to 0.9 kb. The N. brasiliensis, N. crassostreae, N. farcinica, N. otitidiscaviarum, and N. seriolea strains showed distinct ribotype patterns. Unique banding patterns were also seen for the type strains of N. brevicatena, N. carnea, …