ABSTRACT
The pathogenic chytrid fungus Batrachochytrium dendrobatidis (Bd) is considered responsible for the population declines and extinctions of hundreds of amphibian species worldwide. The panzootic was likely triggered by human-assisted spread, but once the pathogen becomes established in a given region, its distribution is probably determined by local drivers. To assess the relative importance of potential drivers of infection in red-spotted newts (Notophthalmus viridescens), we measured Bd levels in 16 populations throughout central Pennsylvania. Infected individuals were detected in all but four populations, indicating that Bd is widespread in this region. We quantified local factors hypothesized to influence Bd, and found that infection levels were best predicted by the proportion of the pond substrate consisting of leaf litter or vegetation, along with a significant effect of water temperature. Bd infection in amphibians is temperature-dependent, and one possible explanation of the apparent substrate effect is that tree cover and vegetation provide shade, reducing the availability of shallow, warm-water patches in which newts might reduce or clear Bd infections. Alternatively, leaf litter and emergent vegetation might increase Bd infection more directly, perhaps by providing substrates for environmental growth of the fungus. We also observed a curvilinear relationship between Bd load and snout-vent length (a proxy for age), hinting that newts might develop acquired resistance to Bd infection. Though correlational, these results add to a growing body of evidence suggesting that environmental temperature is an important driver of Bd infection dynamics.
Subject(s)
Chytridiomycota/pathogenicity , Salamandridae/microbiology , Temperature , Age Factors , Animals , Disease Vectors , Environmental Health/statistics & numerical data , Female , Male , Multivariate Analysis , Prevalence , Risk Assessment/methods , Time Factors , United States/epidemiologyABSTRACT
This article describes differences in perceptions of the child welfare work environment among Title IV-E educated individuals who remain within public child welfare and those who sought employment elsewhere after fulfilling a legal work commitment. Job satisfaction, emotional exhaustion, and personal accomplishment were predictive of staying versus leaving. The empirical evidence suggests that efforts to retain highly skilled and educated public child welfare workers should focus on creating positive organizational climates within agencies.
Subject(s)
Child Welfare , Employment , Personnel Turnover , Social Environment , Adolescent , Adult , Child , Female , Humans , Job Satisfaction , Male , Middle Aged , Organizational Culture , Surveys and QuestionnairesABSTRACT
This study hypothesized that gender-role nonconformity is associated with suicidality, and bullying mediates this relationship. Gay males retrospectively answered questions pertaining to elementary, middle, and high school. Support for the hypotheses was found. Results can help screen gay youth for suicidality and support the need for policies prohibiting harassment based on sexual orientation.
