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41.
The environmental factors affecting the spatial dynamics of bird communities in urban parks are well understood, but much less attention has been paid to the seasonal dynamics of bird communities. Since migrant and resident human commensal birds might have contrasting responses to environmental factors of urban parks, we expected different seasonal dynamics among parks. On the other hand, because bird species can have different habitat relationships throughout the year, we also expected different responses of bird richness to environmental variables between breeding and non-breeding seasons. Bird surveys were conducted in 14 small urban parks (1–4 Ha) of Mar del Plata city (Argentina) for one full annual cycle. Bird richness changed between seasons, but bird abundance remained constant. Bird community composition did not vary between seasons, but urban parks near the urban center, with the highest pedestrian traffic and isolation to other green areas had the least seasonal change of composition. During the breeding season, bird richness was negatively affected by the percentage cover of high buildings surrounding the immediate limits of parks, whereas during the non-breeding season bird richness was not related with any environmental variable. Bird composition variation among parks was affected by the distance to the urban center during both seasons. Results showed that urbanization promotes a seasonal homogenization of bird communities in urban parks, probably by affecting the presence of migrant species and promoting the temporal stability of human commensal species. 相似文献
42.
Eric W. Schoon 《Sociology Compass》2016,10(2):143-152
Analytic and conceptual ambiguity associated with the study of legitimacy have motivated debates over the utility of this construct in the analysis of violent political conflict. Using these debates as a point of departure, I review several challenges that have limited the study of legitimacy in this area and discuss two features of legitimation that have gone widely overlooked: (i) the asymmetric causes and effects of legitimacy and illegitimacy, and (ii) the relational dynamics of legitimation. I argue that turning explicit analytic attention to the asymmetry and relationality of legitimacy and illegitimacy allows us to overcome the most intractable challenges associated with the analysis of legitimation in violent conflict. 相似文献
43.
Sexual identity distress, social support, and the health of gay, lesbian, and bisexual youth 总被引:2,自引:1,他引:1
Sex researchers and mental health clinicians have long recognized that the stigma surrounding homosexuality plays an important role in shaping the social psychological adjustment of gay, lesbian, and bisexual (g/l/b) people. In recent years, researchers have suggested that sexual identity- related distress may influence the physical health status of g/l/b people, primarily because of the ways these self-related feelings and beliefs impact patterns of health-related behavior. This study examines the influence of sexual identity distress and social support on g/l/b youth's drug and alcohol use, psychological distress, and risky sexual behavior. The data come from a services research demonstration program conducted at the Indiana Youth Group, Inc., a g/l/b youth development agency based in Indianapolis, Indiana. Results indicate that sexual identity distress is strongly associated with psychological distress, less frequent use of alcohol, and using fewer types of illegal drugs. Being out to more people in one's support network, however, attenuates the severity of youth's sexual identity-related distress. Youth who report more support ties to g/l/b people indicate engaging in more frequent risky sexual behavior. The implications of these findings for theories of g/l/b youth's sexual identity development are discussed. 相似文献
44.
Eric Neumayer 《Population and environment》2006,27(4):327-336
Some neo-Malthusians regard fertility as being kept in check by scarcities and constraints and, conversely, as being raised by economic prosperity. Since out-migration to developed countries and the receipt of food aid from developed countries relax the constraints imposed by a country’s carrying capacity, both will have a positive effect on fertility rates in developing countries. Moreover, better economic prospects will also raise fertility, all other things equal. This article provides an empirical test of these hypotheses derived from a neo-Malthusian theory of fertility change. The results fail to confirm the theory and often contradict it.
相似文献
Eric NeumayerEmail: Fax: +44-207-9557412 |
45.
The current content analysis of prime-time network television during the fall of 2001 seeks to identify the representation of Gay male, Lesbian, and Bisexual characters in shows known to have one reoccurring homosexual character based on the theories of Clark and Berry. Clark (1969) established four stages of media representation for minority groups: non-representation, ridicule, regulation, and respect. The findings of the study support the premise that Gay males and Lesbians have passed Clark's stage of non-representation and have progressed into the stage of ridicule and some are moving into the stages of regulation and respect. Berry (1980) devised three periods based on the television portrayal of Blacks: The Stereotypic Age, The New Awareness, and Stabilization. Results were mixed, with only a partial support of the hypothesis that Gay males and Lesbians had advanced beyond The Stereotypic Age. 相似文献
46.
This article uses dyadic latent panel analysis (DLPA) to examine environmental influences on well-being. DLPA requires longitudinal
dyadic data. It decomposes the observed variance of both members of a dyad into a trait, state, and an error component. Furthermore,
state variance is decomposed into initial and new state variance. Total observed similarity between members of a dyad is decomposed
into trait similarity, initial state similarity, new state similarity, and error similarity. Dyadic similarity in new state
variance reveals that both members of a dyad change in the same direction, which is a strong indication of environmental effects.
DLPA is used to examine environmental influences on life satisfaction and domain satisfaction based on 22 annual assessments
of married couples in the German Socio-Economic Panel Study (N’s = 607–740). The results show high similarity in new state variance for life satisfaction and objectively identical domains
(household income, housing), and less similarity for objectively less similar domains (recreation, health). This finding provides
strong evidence for environmental influences on well-being. In addition, the results show high trait similarity. The implications
of the latter finding for interpretation of behavioral genetics studies of well-being are discussed. 相似文献
47.
Ine Lietaert Ilse Derluyn Eric Broekaert 《International migration (Geneva, Switzerland)》2014,52(5):144-158
The return of refugees and migrants back to their country of origin is an important topic on the agenda of Western European governments, as return is considered as the most “durable solution” for the “refugee problem”, and as an instrument with which to tackle “illegal” migration. However, these migration policies generally lack a clear evidence base, as little studies have focused on returnees' current living situations and on their perspectives on the re‐migration process. In this paper we therefore try to listen to returnees' voices, through in‐depth interviews with four Nepalese migrants both before (in Belgium) and after (in Nepal) their return, and with 16 returnees after their return to Nepal. The interviews show how most returnees start with a disadvantageous “point of departure” to realize a “successful” return: mostly, they do not really depart “voluntarily”, and they only have limited possibilities for preparing their return and setting realistic expectations. But also, back in the “home country”, most returnees judge their current economic, social and political living situation as bad, meeting little of the expectations that they set before they returned. The participants consider the support they received through the NGOs' return programmes as minimal, because they are mostly limited to a small amount of financial support, and thus of little significance in these returnees' efforts to rebuild their lives in their “home” country. If return programmes want to make a difference in returnees' lives, they should have two extensive components in the “home” and the “host” country, incorporating in both components an integral approach, including economic, political, social and psychological aspects. Viewing these findings, it is not surprising that most interviewees eventually evaluate their return as unsuccessful, and many returnees consider re‐emigration, all of which clearly questions the current basis of worldwide migration policies. 相似文献
48.
Lesbian, gay, and bisexual (LGB) youths are over-represented in the homeless population. To examine why some LGB youths become homeless, this report compares homeless and non-homeless LGB youths. Of the 156 LGB youths, 48% reported ever being homeless (i.e., running away or being evicted from home). Results indicate that sexual orientation awareness and the initiation of sexual behavior occurred earlier in homeless than in non-homeless LGB youths and predated the first homeless episode. Substance use was more frequent and first occurred at an earlier age in homeless as compared to non-homeless LGB youths; however, substance use occurred subsequent to first homelessness. Childhood sexual abuse was associated with homelessness; and, early sexual orientation development was related to homelessness among youths without a history of sexual abuse. Findings suggest that interventions should help youths cope with their unfolding sexual orientation and work to prevent or address the consequences of sexual abuse. 相似文献
49.
This article describes the role that schools are playing in supporting career development for young people. It examines the history of career-related programming in schools, including school-to-work programs, career and technical education, the college and career readiness movement, and current school reform initiatives. This understanding of schools' history, roles, opportunities, and constraints can help practitioners and policymakers think about how to build a system that supports youth development. 相似文献
50.
Jordi Escartín Lucas Monzani Frederick Leong Álvaro Rodríguez-Carballeira 《Work and stress》2017,31(1):42-62
The need for more longitudinal studies (i.e. daily diary and experience sampling studies) focused on counterproductive work behaviours such as bullying requires shorter scales that at the same time do not compromise their content validity. Our main objective is to develop and validate a reduced version of the Workplace Bullying Scale (Escala de Abuso Psicológico Aplicado en el Lugar de Trabajo): the EAPA-T-R. Two studies (Study 1: 1506 and Study 2: 932 employees, respectively) were conducted to evaluate its psychometric properties and to ensure the external validity of the EAPA-T-R. Correlation and regression analyses were performed to reduce the current 12-item scale to a more parsimonious 4-item scale. Moreover, the psychometric properties of potential models were compared. Subsequently, the new scale was assessed using confirmatory factor analysis. Likewise, statistically significant relationships were found between the EAPA-T-R and other dimensions evaluated, such as job characteristics, transformational leadership, engagement, job satisfaction, and subjective performance. Moreover, bullying mediated the relationship between transformational leadership and burnout. To sum up, the EAPA-T-R showed good reliability and validity across studies, supporting its use in future research. The benefits of this short scale for daily diary and experience sampling studies and when using large surveys are discussed. 相似文献