12685 research outputs found
Sort by
Gallery Characteristics and Life History of the Ambrosia Beetle Anisandrus obesus (Coleoptera: Curculionidae: Scolytinae) in Big Tooth Aspen
Full text linkAnisandrus obesus LeConte constructs entrance holes uniformly over the surface of Big Tooth Aspen (Populus grandidenta Michx.) in April each year. An individual female bores a single entrance tunnel about 7 mm into the sapwood and then two lateral tunnels parallel to the surface. After symbiotic fungal growth, eggs are laid along the gallery walls by May. Three larval instars consume the beetle’s symbiotic fungus and do not expand the gallery. Pupae develop through June with progeny adults appearing by mid-July. Progeny sex ratio of approximately 6 females to 1 male was observed. Progeny adults overwinter within the parental gallery; in the spring only females emerge through the parental entrance holes to fly and attack new woody hosts. Anisandru
Assessing the contribution of geography and host use to genetic structure in New York populations of the parasitoid wasp, Aphidius ervi
Full text linkHost-associated differentiation (HAD) been proposed as a general mechanism for differentiation of many groups of parasitic organisms including plant-feeding insects and their natural enemies. In particular, parasitoid wasps that attack herbivorous insects have many life habits similar to other parasitic taxa, suggesting that HAD also may be important in differentiation. We tested for the population genetic signature of HAD in a parasitoid wasp, Aphidius ervi (Haliday), a biocontrol agent that uses many species of aphids throughout Europe, but is mainly limited to the clover and alfalfa host-races of the pea aphid Acyrthosiphon pisum (Harris) in North America. We assessed allelic variation from 6 microsatellite loci across 16 localities along a 200 km transect in New York State to examine genetic structure in relation to pea aphid host race use and geography. Results from AMOVA and pairwise FST values indicate that there is no genetic structure in A. ervi due to HAD, and there was a general lack of genetic structure across the geographic range. These findings suggest that A. ervi localities are connected by high levels of gene flow that likely swamp out selection for specialization on the pea aphid host races that differ in defenses and resource quality as hosts for A. ervi. The spatiotemporal distribution of hosts as well as dispersal characteristics of parasitoids in general need to be integrated into consideration of the potential role of HAD in parasitoid taxa
Mixed Species Feeding Assemblages of Planthopper Nymphs (Homoptera: Fulgoroidea)
Full text linkThe occurrence of four species of southern Illinois fulgoroids in mixed species feeding assemblages is reported
The Map of Wilderland: Ecocritical Reflections on Tolkien’s Myth of Wilderness (2022) by Amber Lehning
Full text linkBook review, by Andrew Higgins, of The Map of Wilderland: Ecocritical Reflections on Tolkien’s Myth of Wilderness (2022) by Amber Lehnin
Attribution Patterns and Relationship Satisfaction in ADHD Romantic Dyads
No full textResearch shows that romantic relationships significantly impact health, with stable relationships enhancing well-being and high-stress relationships increasing risk for depression, anxiety, and substance use disorders. Relationship discord is common in couples where one or both partners exhibit ADHD symptoms, but little research examines the factors mediating ADHD and low relationship satisfaction. Given that attribution patterns affect relationship satisfaction, we aim to explore how ADHD-related attribution patterns mediate the link between ADHD symptoms and relationship satisfaction in affected romantic partners. We plan to use a quantitative approach grounded in attribution psychology to survey participants on relationship distress, attributional locus of control, and attributional patterns. Currently, we have obtained IRB approval, and plan to collect online data via Qualtrics and Prolific beginning in the summer. We hypothesize that attribution patterns and locus of control mediate the link between ADHD symptom differences and relationship satisfaction. Specifically, couples attributing negative behaviors to stable, global factors (e.g., they always forget because they are lazy ) will report lower satisfaction than those who see behaviors as situational (e.g. they forgot because they had a long day ). We expect more ADHD-related differences to increase maladaptive attributional patterns, heightening relationship discord. The implications of this study include identification of potential strategies for clinicians serving couples where ADHD impacts relationship dynamics and addressing the gap in the literature surrounding neurodivergent relationships
A List of the Fulgoroidea (Homoptera) of Southern Illinois
Full text linkA list of the fulgoroids of southern Illinois is presented with information on their distributions within the state
Report of New Trichoptera Records for Ohio
Full text linkNew state records are given for 16 species of Trichoptera collected at four northeastern Ohio locations
Report of a Native Foodplant for \u3ci\u3eHaploa Confusa\u3c/i\u3e (Lepidoptera: Arctiidae)
Full text linkNo Abstract Available
Pd(0)-Catalyzed TMM Cycloadditions with Epoxide-Modified Precursors: A New Approach to 5-Membered Ring Synthesis
No full textPd0-catalyzed trimethylenemethane (TMM) cycloaddition reactions have been used extensively to generate substituted 5-membered rings with high levels of regioselectivity, chemoselectivity, and stereoselectivity. These rings have many practical applications, such as polymer and pharmaceutical molecule synthesis. We aim to improve upon existing methodologies by introducing an epoxide functional group into the TMM precursor molecule, which should yield more highly functionalized products. A three-step synthesis of a TMM precursor has been achieved in 20% overall yield, quantified by structure and mass analysis at each step. Efforts are underway to determine the reactivity of this precursor in Pd0-catalyzed cycloaddition reactions with α,β-unsaturated carbonyl compounds
Determining Factors that Affect Gas Binding Specificity for the Carbon Monoxide Sensor, CooA
No full textCooA is a protein found in Rhodospirillum rubrum (Rr) and Carboxydothermus hydrogenoformans (Ch) and naturally acts as a carbon monoxide (CO) sensor and transcription factor. When CO binds to the CooA heme, the protein undergoes a conformational change that enables it to bind to DNA. The broader goal of this research is to obtain a mechanistic understanding of how the CooA heme, along with the amino acids that are located near the heme, enable CooA to act as a CO-specific sensor. Our current project is to determine if a cysteine amino acid that is close to the heme group alters the specificity of the regulatory gas during the activation mechanism. Preliminary results from electronic absorbance spectroscopy indicate that this cysteine influences the coordination chemistry of the CooA heme, possibly enabling other gases like nitric oxide to activate the DNA binding function