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Articles 1 - 30 of 35
Full-Text Articles in Life Sciences
The Influence Of Historical Landscape Change On Genetic Variation And Population Structure Of A Terrestrial Salamander ( Plethodon Cinereus ), Mark Jordan, Douglas Morris, Scott Gibson
The Influence Of Historical Landscape Change On Genetic Variation And Population Structure Of A Terrestrial Salamander ( Plethodon Cinereus ), Mark Jordan, Douglas Morris, Scott Gibson
Mark A. Jordan
Forest loss and fragmentation is expected to shape the genetic structure of amphibian populations and reduce genetic variation. Another factor widely understood to have impacted these same parameters in North America is the range expansion that occurred following glacial retreat at the end of the Pleistocene. The Eastern Red-Backed Salamander (Plethodon cinereus) has been subjected to both processes. In this context, we investigated the historical events that are likely to have shaped genetic variation in this species using a panel of six microsatellite markers screened on individuals sampled across ten localities in northeastern Indiana, USA. We found low genetic diversity …
Mexican Axolotls ( Ambystoma Mexicanum ) Appear To Be Resistant To Ambystoma Tigrinum Virus (Atv), Crystal Paulson, Robert Visalli, Mark Jordan
Mexican Axolotls ( Ambystoma Mexicanum ) Appear To Be Resistant To Ambystoma Tigrinum Virus (Atv), Crystal Paulson, Robert Visalli, Mark Jordan
Mark A. Jordan
No abstract provided.
Species-Level Correlates Of Susceptibility To The Pathogenic Amphibian Fungus Batrachochytrium Dendrobatidis In The United States, Betsy Bancroft, Barbara Han, Catherine Searle, Lindsay Biga, Deanna Olson, Lee Kats, Joshua Lawler, Andrew Blaustein
Species-Level Correlates Of Susceptibility To The Pathogenic Amphibian Fungus Batrachochytrium Dendrobatidis In The United States, Betsy Bancroft, Barbara Han, Catherine Searle, Lindsay Biga, Deanna Olson, Lee Kats, Joshua Lawler, Andrew Blaustein
Lee Kats
Disease is often implicated as a factor in population declines of wildlife and plants. Understanding the characteristics that may predispose a species to infection by a particular pathogen can help direct conservation efforts. Recent declines in amphibian populations world-wide are a major conservation issue and may be caused in part by a fungal pathogen, Batrachochytrium dendrobatidis (Bd). We used Random Forest, a machine learning approach, to identify species-level characteristics that may be related to susceptibility to Bd. Our results suggest that body size at maturity, aspects of egg laying behavior, taxonomic order and family, and reliance on water are good …
Curricular Reform And Inquiry Teaching In Biology: Where Are Our Efforts Most Fruitfully Invested, Briana Timmerman, Denise Strickland, Susan Carstensen
Curricular Reform And Inquiry Teaching In Biology: Where Are Our Efforts Most Fruitfully Invested, Briana Timmerman, Denise Strickland, Susan Carstensen
Briana Eileen Timmerman
No abstract provided.
The Interplay Of Host Morphology And Symbiont Microhabitat In Coral Aggregations, B. Helmuth, Briana Timmerman, K. Sebens
The Interplay Of Host Morphology And Symbiont Microhabitat In Coral Aggregations, B. Helmuth, Briana Timmerman, K. Sebens
Briana Eileen Timmerman
No abstract provided.
Performance-Based Data In The Study Of Stem Phd Education, David Feldon, Michelle Maher, Briana Timmerman
Performance-Based Data In The Study Of Stem Phd Education, David Feldon, Michelle Maher, Briana Timmerman
Briana Eileen Timmerman
No abstract provided.
Total Cadmium, Copper And Zinc In Two Dreissenid Mussels, Dreissena Polymorpha And Dreissena Bugensis, At The Outflow Of Lake Ontario, Carolyn Johns, Briana Timmerman
Total Cadmium, Copper And Zinc In Two Dreissenid Mussels, Dreissena Polymorpha And Dreissena Bugensis, At The Outflow Of Lake Ontario, Carolyn Johns, Briana Timmerman
Briana Eileen Timmerman
No abstract provided.
Translating Expertise Into Effective Instruction: The Impacts Of Cognitive Task Analysis (Cta) On Laboratory Report Quality And Student Retention In The Biological Sciences, David Feldon, Briana Timmerman, Kirk Stowe, Richard Showman
Translating Expertise Into Effective Instruction: The Impacts Of Cognitive Task Analysis (Cta) On Laboratory Report Quality And Student Retention In The Biological Sciences, David Feldon, Briana Timmerman, Kirk Stowe, Richard Showman
Briana Eileen Timmerman
No abstract provided.
Adaptation As Process: The Future Of Darwinism And The Legacy Of Theodosius Dobzhansky, David Depew
Adaptation As Process: The Future Of Darwinism And The Legacy Of Theodosius Dobzhansky, David Depew
David J Depew
Conceptions of adaptation have varied in the history of genetic Darwinism depending on whether what is taken to be focal is the process of adaptation, adapted states of populations, or discrete adaptations in individual organisms. I argue that Theodosius Dobzhansky’s view of adaptation as a dynamical process contrasts with so-called “adaptationist” views of natural selection figured as “design-without-a-designer” of relatively discrete, enumerable adaptations. Correlated with these respectively process and product oriented approaches to adaptive natural selection are divergent pictures of organisms themselves as developmental wholes or as “bundles” of adaptations. While even process versions of genetical Darwinism are insufficiently sensitive …
The Complexity Of Amphibian Population Declines: Understanding The Role Of Cofactors In Driving Amphibian Losses, Andrew Blaustein, Barbara Han, Rick Relyea, Pieter Johnson, Julia Buck, Stephanie Gervasi, Lee Kats
The Complexity Of Amphibian Population Declines: Understanding The Role Of Cofactors In Driving Amphibian Losses, Andrew Blaustein, Barbara Han, Rick Relyea, Pieter Johnson, Julia Buck, Stephanie Gervasi, Lee Kats
Lee Kats
Population losses and extinctions of species are occurring at unprecedented rates, as exemplified by declines and extinctions of amphibians worldwide. However, studies of amphibian population declines generally do not address the complexity of the phenomenon or its implications for ecological communities, focusing instead on single factors affecting particular amphibian species. We argue that the causes for amphibian population declines are complex; may differ among species, populations, and life stages within a population; and are context dependent with multiple stressors interacting to drive declines. Because amphibians are key components of communities, we emphasize the importance of investigating amphibian declines at the …
Anatomy And Morphology Of Red Mangrove (Rhizophora Mangle) Plants In Relation To Internal Airflow, Ls Evans, Y Okawa, Dg Searcy
Anatomy And Morphology Of Red Mangrove (Rhizophora Mangle) Plants In Relation To Internal Airflow, Ls Evans, Y Okawa, Dg Searcy
Dennis G. Searcy
No abstract provided.
Crystallization Of A Fe,Zn Superoxide-Dismutase From The Archaebacterium Thermoplasma-Acidophilium, Dc Morris, Dg Searcy, Bfp Edwards
Crystallization Of A Fe,Zn Superoxide-Dismutase From The Archaebacterium Thermoplasma-Acidophilium, Dc Morris, Dg Searcy, Bfp Edwards
Dennis G. Searcy
No abstract provided.
Cytoskeletal Origins In Sulfur-Metabolizing Archaebacteria, Dg Searcy, Wg Hixon
Cytoskeletal Origins In Sulfur-Metabolizing Archaebacteria, Dg Searcy, Wg Hixon
Dennis G. Searcy
No abstract provided.
Nucleoprotein Subunit Structure In An Unusual Prokaryotic Organism - Thermoplasma-Acidophilum, Dg Searcy, Db Stein
Nucleoprotein Subunit Structure In An Unusual Prokaryotic Organism - Thermoplasma-Acidophilum, Dg Searcy, Db Stein
Dennis G. Searcy
No abstract provided.
Rapid Hydrogen Sulfide Consumption By Tetrahymena Pyriformis And Its Implications For The Origin Of Mitochondria, Dg Searcy
Dennis G. Searcy
No abstract provided.
Histone-Like Protein In The Archaebacterium Sulfolobus-Acidocaldarius, Gr Green, Dg Searcy, Rj Delange
Histone-Like Protein In The Archaebacterium Sulfolobus-Acidocaldarius, Gr Green, Dg Searcy, Rj Delange
Dennis G. Searcy
No abstract provided.
A Thermophilic Archaebacterium With Phenotypic Characters Typically Associated With The Eukaryotic Nucleo-Cytoplasm, Dg Searcy
Dennis G. Searcy
No abstract provided.
A Mycoplasma-Like Archaebacterium Possibly Related To The Nucleus And Cytoplasm Of Eukaryotic Cells, Dg Searcy, Db Stein, Kb Searcy
A Mycoplasma-Like Archaebacterium Possibly Related To The Nucleus And Cytoplasm Of Eukaryotic Cells, Dg Searcy, Db Stein, Kb Searcy
Dennis G. Searcy
No abstract provided.
Sulfur Reduction By Human Erythrocytes, Dg Searcy, Sh Lee
Sulfur Reduction By Human Erythrocytes, Dg Searcy, Sh Lee
Dennis G. Searcy
No abstract provided.
Phylogenetic And Phenotypic Relationships Between The Eukaryotic Nucleocytoplasm And Thermophilic Archaebacteria, Dg Searcy
Dennis G. Searcy
No abstract provided.
Histone-Like Proteins And Chromosomal Structure In Certain Archaebacteria, Dg Searcy, Gr Green
Histone-Like Proteins And Chromosomal Structure In Certain Archaebacteria, Dg Searcy, Gr Green
Dennis G. Searcy
No abstract provided.
A Histone-Like Protein (Hta) From Thermoplasma-Acidophilum .2. Complete Amino-Acid-Sequence, Rj Delange, Lc Williams, Dg Searcy
A Histone-Like Protein (Hta) From Thermoplasma-Acidophilum .2. Complete Amino-Acid-Sequence, Rj Delange, Lc Williams, Dg Searcy
Dennis G. Searcy
No abstract provided.
Cytoskeleton In The Archaebacterium Thermoplasma-Acidophilum - Viscosity Increase In Soluble Extracts, Wg Hixon, Dg Searcy
Cytoskeleton In The Archaebacterium Thermoplasma-Acidophilum - Viscosity Increase In Soluble Extracts, Wg Hixon, Dg Searcy
Dennis G. Searcy
No abstract provided.
Thermoplasma-Acidophilum Histone-Like Protein - Partial Amino-Acid-Sequence Suggestive Of Homology To Eukaryotic Histones, Dg Searcy, Rj Delange
Thermoplasma-Acidophilum Histone-Like Protein - Partial Amino-Acid-Sequence Suggestive Of Homology To Eukaryotic Histones, Dg Searcy, Rj Delange
Dennis G. Searcy
No abstract provided.
Hs-:O-2 Oxidoreductase Activity Of Cu,Zn Superoxide Dismutase, Dg Searcy
Hs-:O-2 Oxidoreductase Activity Of Cu,Zn Superoxide Dismutase, Dg Searcy
Dennis G. Searcy
No abstract provided.
Hydrogen Sulfide Consumption Measured At Low Steady State Concentrations Using A Sulfidostat, Dg Searcy, Ma Peterson
Hydrogen Sulfide Consumption Measured At Low Steady State Concentrations Using A Sulfidostat, Dg Searcy, Ma Peterson
Dennis G. Searcy
No abstract provided.
Sulfide Oxidation Coupled To Atp Synthesis In Chicken Liver Mitochondria, R Yong, Dg Searcy
Sulfide Oxidation Coupled To Atp Synthesis In Chicken Liver Mitochondria, R Yong, Dg Searcy
Dennis G. Searcy
No abstract provided.
Tyrosine Environment And Phosphate Binding In The Archaebacterial Histone-Like Protein Hta, Dg Searcy, T Montenaygarestier, Dj Laston, C Helene
Tyrosine Environment And Phosphate Binding In The Archaebacterial Histone-Like Protein Hta, Dg Searcy, T Montenaygarestier, Dj Laston, C Helene
Dennis G. Searcy
No abstract provided.
Thermoplasma - A Primordial Cell From A Refuse Pile, Dg Searcy
Thermoplasma - A Primordial Cell From A Refuse Pile, Dg Searcy
Dennis G. Searcy
No abstract provided.
Features In Thermophilic Archaebacteria That May Be Preadaptations For The Evolution Of The Eukaryotic Cell, Dg Searcy
Dennis G. Searcy
No abstract provided.