Planktonic algae abundance and diversity are similar in urban stormwater ponds of different geographic locations and natural shallow lakes

Elevated levels of different contaminants are typical to stormwater management ponds. Despite that, a number of works report stormwater ponds serving as habitats for a variety of biota. In this study we aimed to examine phytoplankton communities of urban ponds, as the basis of the aquatic food web, and compare them to those of natural shallow lakes. Stormwater ponds were selected from two distant geographic locations: three in Denmark and three in Canada. As a reference to natural systems, three Danish shallow lakes were sampled. The sampling was carried out in the spring, summer and fall of 2014. The phytoplankton communities in ponds were found to be at least as rich in taxa as natural shallow lakes. Their abundance and biovolume varied highly among the types of water bodies as well as in each pond or lake individually, depending on the sampling month. We did not find any significant differences among ponds and natural shallow lakes at the investigated taxonomic level, despite some distinction observed by multivariate DCA and CCA analyses. Little difference was found between Canadian and Danish ponds as well, even though they are separated by a large geographic distance. This study shows that stormwater ponds are habitats for diverse planktonic algae communities which have some similarities to those of natural shallow lakes. Also, the similarities observed between Danish and Canadian ponds indicate some consistence with the urban homogenization hypothesis, although this should be further looked into by future works examining a larger number and distinct types of ponds.

     

A new preventive intervention for children of substance‐abusing parents: Results of a randomized controlled trial

Children of substance‐abusing parents (COS) are at risk for developing psychosocial problems. We evaluated the effectiveness of the manualized, 9‐session psycho‐educational preventive intervention “TRAMPOLINE” (PE) for 8–12‐year‐old COS compared with a non‐educational “fun and play” group (NE) of equal length delivered by social workers in 27 German counselling centres. A randomized controlled trial was conducted to compare PE (n = 130) and NE (n = 88) outcomes at baseline, post intervention, and 6‐month follow‐up. Primary outcomes were related to stress and coping; secondary were also examined. Analyses were conducted using baseline‐adjusted repeated measures linear mixed models. Five outcomes revealed improvements both in PE and NE, four of which were more pronounced in PE, and one more pronounced in NE. Small but significant group differences in favour of PE were found in “social isolation” and “addiction‐related knowledge.” Children from both groups reported reduced mental distress, reduced avoidance in coping with family stress, improved self‐perceived autonomy, and a better parent–child relationship. No changes were observed in self‐efficacy, physical stress symptoms, and in other health‐related quality of life aspects. TRAMPOLINE can instill positive changes in COS by reducing mental distress and social isolation.     

The relations of children’s emotion knowledge to their observed social play and reticent/uninvolved behavior in preschool: Moderation by effortful control

Using data from a study of 140 preschool children (39% female), we examined the relations between direct assessments of emotion knowledge and naturalistic observations of behavior during free‐play periods, and tested parent‐ and teacher‐reported effortful control as a moderator of these relations. Basic emotion recognition was unrelated to social play and reticent behavior, whereas situational understanding of emotions (thought to be a relatively sophisticated aspect of emotion knowledge) was negatively related to reticent/uninvolved behavior and marginally positively related to social play. Effortful control significantly moderated these relations, such that situational emotion understanding was more strongly related to reticent/uninvolved behavior and social play at low levels of effortful control, and unrelated to outcomes at high levels of effortful control. These results highlight the unique role of situational understanding in predicting children’s social competence and suggest that emotion knowledge is particularly important for children who struggle with effortful regulation skills.     

Corporate diplomacy and political CSR: Similarities,differences and theoretical implications

The purpose of this study is to systematically review the body of knowledge on corporate diplomacy (CD) and political corporate social responsibility (PCSR) in journals from the fields of public relations, public diplomacy, general management and business ethics. By applying an interdisciplinary approach our study aims to (1) examine what definitions of CD and PCSR exist, (2) explore what theories have been applied to CD and PCSR and, (3) find differences and commonalities between the underlying concepts of CD and PCSR. Building on the results of our review, we redefine each construct and develop a theoretical framework of CD, which integrates PCSR, international public relations and public diplomacy. Our results serve as a foundation for an operationalization of the constructs in order to conduct empirical analyses and contribute to current research on the political role of multinational corporations.     

Prevalence and risk factors of Leptospira infection in urban brown rats (Rattus norvegicus), Vienna,Austria

Urban Ecosystems - Leptospirosis is a worldwide bacterial zoonosis which incidence is expected to increase in conjunction with global change. In urban ecosystems, synanthropic rats are the key...     

Effects of Defending: The Longitudinal Relations Among Peer‐perceived Defending of Victimized Peers,Victimization, and Liking

Previous research has shown victims of peer aggression to be positively impacted by being defended by peers, but how enacted defending impacts defenders themselves is not thoroughly understood. In this study, the longitudinal associations between peer‐perceived liking, enacted defending, and defender's own victimization were investigated among 336 adolescents (M age = 13.21 years). Peer perceived liking was expected to predict defending. It was also hypothesized that a reputation for defending victimized peers would be related to being perceived as less victimized and more liked over time. Results showed that peer perceived liking was not predictive of defending. Enacted defending was associated with a decrease in victimization over time, but also a decrease in peer‐perceived liking. Defenders may benefit from enacted defending by decreasing their own victimization, but this benefit is nuanced.     

Book review

Incurably romantic by Bernard F. Stehle Philadelphia: Temple University Press, 1985. (243 pp. text with 120 photographs. $30. cloth).     

The Norm among the Exceptional? Experiences of Latino Students in Elite Institutions

This article examines Latino students’ experiences within two elite educational contexts: an elite liberal arts college and an elite law school. Drawing on combined data of 42 in‐depth interviews, we interrogate how elite institutional spaces reify and shape panethnic identities. In the face of marginalization in predominantly white, elite spaces Latino students strategically search for new community and comfort, which in turn influence how they perceive their identities, encouraging a broadening of boundaries to include both panethnic and minority alliances. By documenting the experiences of Latino students in two stages of the educational pipeline, we show how elite institutions influence identity talk lead students to cultivate a sense of shared fate with other Latino‐origin individuals and at times, people of color in general.     

Introduction: Welfare Reform: Preliminary Research and Unanswered Questions

This article summarizes the 1996 welfare reform act and introduces a set of key questions that remain unanswered as initial results concerning the effects of welfare reform are being analyzed and discussed by policymakers andresearchers. We introduce the collection of articles presented in this issue of the Journal of Social Issues, which are devoted to the topic of welfare reform and its potential ramifications for the well-being of families. The articles are grouped into three broad areas that represent major topics of interest to researchers, policy analysts, and others concerned with how welfare reform affects the lives of women and families: the politics of welfare reform, barriers to employment, and the impact of welfare reform on family life.     

Optimal estimation for finite population mean in two-phase sampling

Using two-phase sampling scheme, we propose a general class of estimators for finite population mean. This class depends on the sample means and variances of two auxiliary variables. The minimum variance bound for any estimator in the class is provided (up to terms of ordern ⁻¹). It is also proved that there exists at least a chain regression type estimator which reaches this minimum. Finally, it is shown that other proposed estimators can reach the minimum variance bound, i.e. the optimal estimator is not unique.