Bowling Green State University

About: Bowling Green State University is a education organization based out in Bowling Green, Ohio, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 8315 authors who have published 16042 publications receiving 482564 citations. The organization is also known as: BGSU.

Measuring pollinator-mediated selection on morphometric floral traits: bumblebees and the alpine sky pilot, polemonium viscosum

Abstract: Sweet-flowered plants of Polemonium viscosum in Colorado are visited by a fly-dominated pollinator fauna at timberline (krummholz), but almost exclusively by bumblebees in higher-elevation tundra habitats. Significant increases in flower size and height are associated with increasing elevation along this habitat gradient. This paper presents the results of an experiment designed to test whether bumblebees exert sufficient selection on morphometric floral phenotypes to account for the clinal shifts seen in natural populations. Two populations of sweet-flowered plants of krummholz origin were established: one randomly pollinated, the other solely bumblebee-pollinated. I tested the effects of two independent axes of floral variation, obtained by principal-components analysis, on mean seed set per flower of plants in each population. PC1, with strong correlations to corolla diameter, corolla length, and stem height, explained a significant amount of variance in seed set for bumblebee-pollinated plants but had no bearing on that of randomly pollinated plants. PC2, with strong correlation to flower number, did not influence seed set in either population. Bumblebee behavior was correlated with variation in PC1 scores of the selected population, yielding positive directional selection on morphometric floral traits associated with PC1. Selection coefficients for PC1, corolla length, corolla diameter, and inflorescence height were estimated, respectively, as 0.11, 0.09, 0.07, and 0.06 (P < 0.025 in all cases). These results support the hypothesis that pollinator-mediated selection can bring about changes in floral form, and can explain shifts in floral morphology of P. viscosum along natural habitat gradients.

Testing and Locating Variance Changepoints with Application to Stock Prices

Abstract: This article explores testing and locating multiple variance changepoints in a sequence of independent Gaussian random variables (assuming known and common mean). This type of problem is very common in applied economics and finance. A binary procedure combined with the Schwarz information criterion (SIC) is used to search all of the possible variance changepoints existing in the sequence. The simulated power of the proposed procedure is compared to that of the CUSUM procedure used by Inclan and Tiao to cope with variance changepoints. The SIC and unbiased SIC for this problem are derived. To obtain the percentage points of the SIC criterion, the asymptotic null distribution of a function of the SIC is obtained, and then the approximate percentage points of the SIC are tabulated. Finally, the results are applied to the weekly stock prices. The unknown but common mean case is also outlined at the end.

We Can Be Athletic and Feminine, But Do We Want To? Challenging Hegemonic Femininity in Women's Sport

Abstract: More women than ever before are panicipating in a diverse array of sports. However, at the same time, this popularity accentuates the femininity of these sportswomen, protecting the “image” of women's sports. The underlying message is that athleticism and femininity contrddictory, and females have to go out of their way to show that they can be athletic and be socially accepted. Kolnes' (1995) concept of heterosexuality as an organizing principle in women's sport provides the foundation for understanding the social construction of females in sport. Generally, women who appear heterosexually feminine are privileged over women perceived as masculine. Consequences of nonconformity to hegemonic femininity in sport often include sexist and heterosexist ddiscrimination. This leads many sportswomen to emphasize feminine characteristics to avoid prejudice and discrimination. However, females perceived as too feminine are then sexualized and trivialized, leaving women to carefully balance athleticism with hegemoni...

Emotions and Crime over the Life Course: A Neo- Meadian Perspective on Criminal Continuity and Change

Abstract: A symbolic interactionist perspective on the emotions is presented that highlights their social character, forges links to cognitive processes, and suggests ways in which emotions influence long‐term patterns of criminal involvement. This neo‐Meadian perspective contrasts with theories of desistance that focus on the role of informal social controls and develops the view of an emotional self that flourishes somewhat independent of the major role transitions typically emphasized in sociological studies of the life course. The authors also explore ways in which attention to the emotional realms of experience adds to traditional treatments of the impact of adult transition events (e.g., the “good marriage effect”). Interviews with male and female adolescent offenders and two waves of adult follow‐up data document general patterns of association and support the argument that a social view of emotional processes is critical to a comprehensive understanding of life course patterns of criminal continuity and change.