Mountain chickadees adjust songs,calls and chorus composition with increasing ambient and experimental anthropogenic noise

Vocal plasticity may allow birds to reduce masking effects of noise pollution arising from urbanization. Mountain chickadees (Poecile gambeli) use both songs and calls during the dawn chorus, which vary in masking susceptibility. Thus, increasing song or call frequency, or switching between vocalization types are all potential mechanisms to reduce masking during fluctuating noise conditions. Further, prior experience with noise pollution may be a necessary precursor to allow birds to alter signals in response to sudden noisy conditions. To determine how mountain chickadee songs, calls, and chorus composition are affected by noise, we recorded 55 males across gradients of local ambient noise and habitat urbanization in three cities in British Columbia, Canada. Of these individuals, 31 were also exposed to 5-min experimental noise treatments. Habitat urbanization was quantified through a continuous index reflecting properties of urbanized areas. Only song frequency increased with local ambient noise, and this effect varied regionally. In response to experimental noise exposure, males increased the frequency of their calls (but not of their songs), and varied their use of songs vs. calls. Interestingly, this response was dependent on local ambient noise levels: males in noisy areas shifted to using relatively more songs, whereas males in quiet areas shifted to using relatively more calls. These findings may suggest that although mountain chickadees are capable of adjusting their vocalizations, choosing a response which can lead to masking release may require prior exposure to high levels of ambient noise.     

Urban environments are associated with earlier clutches and faster nestling feather growth compared to natural habitats

Urbanization creates new habitats with novel benefits and challenges not found in natural systems. How a species fares in urban habitats is largely dependent on its life history, yet predicting the response of individual species to urbanization remains a challenge. While some species thrive in urban areas, others do poorly or are not present at all. Mountain chickadees (Poecile gambeli) are year-round residents of montane regions of western North America. Commonly found in higher-elevation coniferous forests, these birds can also be found in urban areas where they will regularly visit bird feeders and nest in nest boxes. We monitored mountain chickadees nesting along a habitat gradient, from natural habitat to suburban areas, to determine if the degree of urbanization was associated with: clutch size and success; nestling growth rates; or variation in parental size and age. Females nesting in urbanized areas initiated clutches earlier in the breeding season than those in natural areas, but neither fledging success nor the rate of nestling mass-change differed between habitats. Nestling feather growth-rate increased with later first egg dates in both habitats, and the magnitude of this increase was greatest in urban habitats. We found no difference in the proportion of first-time breeders versus experienced breeders between habitat types, nor any differences in male or female mass or size. Our results indicate no detriment to nesting in urban habitats, suggesting mountain chickadees are able to adapt to moderate urbanization much like other members of the Paridae family.     

„Da gibt es Sachen,die macht man einfach nicht“ – Deutungsmuster von Banken im Kontext von Nachhaltigkeit und Krise

Banks in Germany are experiencing a profound legitimacy crisis. In the wake of financial and economic crises, failures, and bailouts, as well as new oversight and stricter regulations, banks have lost the reputation and trust they once had. The present article uses an analysis of interpretative patterns to examine how banks seek to legitimize themselves in times of crisis, with reference to sustainability as a guiding principle of society. Following the concept of social legitimacy by new institutionalism in sociology, and based on discursive interviews with 18 representatives of German banks, we reconstructed three interpretative patterns: a) the differentiation from “bad” banks, which abandons profit-maximizing business models and promotes the moral superiority of sustainable banking, b) responsibility for society, which promotes the role and responsibility of banks as socially relevant actors that spur social change, and c) “right” return, whereby banks seek an appropriate relationship between their value orientation and a return on investments. Although a return on investment is economically necessary and confers legitimacy, it may not be understood as an end in itself. Banks discredited during the crisis can refocus on a banking model which promises social legitimacy by referring to sustainability.     

Making the Best of a Bad Situation: Material Resources and Teenage Parenthood

Past research has largely ignored the influence of material resources on teenage parents' life outcomes. A lack of resources such as housing, child care, and financial support is hypothesized to explain the negative effect of teenage parenthood on educational attainment. Regression analyses use nationally representative data from the 1988 - 2000 National Education Longitudinal Study (N = 8,432, n = 356 teenage parents). Results support the hypothesis completely for the teenage fathers in the sample and partially for mothers: Resources substantially diminish the educational penalty teenage parents paid by age 26. Gender influences which types of resources are protective, providing policy implications. Help with child care is critical for teenage mothers, whereas housing and financial resources may be important for men.     

Exploring the Gender Gap in Support for a Woman for President

The gender gap in support for a female presidential candidate gathered much media attention with Hillary Clinton as a frontrunner for the 2008 democratic presidential nomination. Two common explanations for this gap are that women have more liberal gender role and political attitudes. We contend that another important, and distinct, factor for heightened support among women is a shared social identity. We tested these three explanations across two studies. In Study 1, hierarchical regression analyses revealed that both attitudes toward women and sex independently predict a significant proportion of the variance in willingness to elect a woman for president. In Study 2, hierarchical regression analyses showed that when entered together, attitudes toward female authority and sex independently predict support, but when political attitudes was entered, only sex and political attitudes predicted support for Clinton. Finally, as expected, when primed with their gender identity, women increased their support for Clinton and men decreased their support, and women perceived her more favorably and men less so. In sum, these studies strongly support the arguments that the gender gap in support for female presidential candidates stems in part from women's more liberal gender role and political attitudes, and also from women sharing the same gender social identity as a female candidate for commander in chief .     

The Beliefs in the Inheritance of Risk Factors for Suicide Scale (BIRFSS): further results on demographic correlates, dimensionality, reliability, and validity

Convergent lines of evidence from adoption, family, geographical, immigrant, molecular genetic, surname, and twin studies of suicide point to genetic contributions to risk factors for suicidal behavior. Related mental health literacy (knowledge and beliefs) of professionals and laypersons may, however, lag behind this research progress. The purpose of this study was to further validate the 22-item Beliefs in the Inheritance of Risk Factors for Suicide Scale (BIRFSS), a novel instrument for assessing individuals' beliefs in the genetics of suicide. Data from a general population sample of 159 Austrian adults showed adequate internal scale consistency. Due to deliberate content heterogeneity, the instrument has a subscale structure, but factor analysis of items extracted a dominant first factor. BIRFSS scores were positively related to overall and specific knowledge on suicide facts (convergent validity), whereas unrelated to the Big Five personality dimensions, locus of control, social desirability, and verbal intelligence (discriminant validity). Demographic correlates of BIRFSS scores included respondents' age and religiosity (both positive ones), but not respondents' sex, educational level, or political orientation.     

Not making the transition to college: School, work, and opportunities in the lives of American youth

Unlike traditional research on educational stratification that focuses on the pursuit of higher education, our study examines why young adults do not make the transition to college, using a nationally representative sample of college non-enrollees (N = 2640). In applying latent class analysis techniques, we identified multiple types of students who do not pursue college. One group of non-enrollees (27.6%) reports forgoing college because the economic barriers are too high - either because of college affordability or family financial responsibility. These youth had both low math test scores and low family income, and thus closely align with regression-based analyses on college enrollment that emphasize academic and economic constraints as the central barriers to educational progress. However, we also identified a second, often overlooked group of youth who had the academic preparation and family income support to enroll in higher education, but decided to forgo college because they preferred to work and to make money (18.3%). The heterogeneous motives of these youth suggest that postsecondary decisions are not always guided by academic and economic barriers, but sometimes driven by previous work experience and perceptions of local opportunities for school and work.     

双保险认证新加坡大学

面向中国使用电子签证从新加坡驻华使馆获悉,自2009年7月1日起对中国人士签发电子签证。申请人可凭电子签证的下载打印件入境新加坡,电子签证下载打印件和新加坡移民与关卡局签发的电子签证下载打印件式样相同。     

Effects of Minority Status and Perceived Discrimination on Mental Health

Based in a minority social stress perspective, this study uses propensity score matching techniques to assess the impact of self-reported discrimination on mental health. Using a sample of 14,609 young adults from the National Longitudinal Study of Adolescent to Adult  Health, we explore whether the effects of discrimination vary across status characteristics (e.g., gender, race/ethnicity, sexual orientation, and body mass), including both majority and minority populations. Further we investigate the heterogeneous effects of discrimination across propensity scores, or probabilities of experiencing discrimination. We find that self-reported discrimination increases the average perceived stress score and depressive symptoms score by roughly ½ standard deviation, but is not related to anxiety. Further, our results show that while all groups are negatively affected by discrimination, the magnitude of the impact is largest among groups with the lowest propensity scores.     

Informal Caregiving and Quality of Life Among Older Adults: Prospective Analyses from the Swedish Longitudinal Occupational Survey of Health (SLOSH)

Social Indicators Research - Providing unpaid informal care to someone who is ill or disabled is a common experience in later life. While a supportive and potentially rewarding role, informal care...