Silphids in urban forests: Diversity and function

Many ecologists have examined the process of how urbanization reduces biological diversity but rarely have its ecological consequences been assessed. We studied forest-dwelling burying beetles (Coleoptera: Silphidae)—a guild of insects that requires carrion to complete their life cycles—along an urban-rural gradient of land use in Maryland. Our objective was to determine how forest fragmentation associated with urbanization affects (1) beetle community diversity and structure and (2) the ecological function provided by these insects, that is, decomposition of vertebrate carcasses. Forest fragmentation strongly reduced burying beetle diversity and abundance, and did so far more pervasively than urbanization of the surrounding landscape. The likelihood that beetles interred experimental baits was a direct, positive function of burying beetle diversity. We conclude that loss of burying beetle diversity resulting from forest fragmentation could have important ecological consequences in urban forests.     

The (Conditional) Resource Dilution Model: State- and Community-Level Modifications

Demography - One of the most consistent patterns in the social sciences is the relationship between sibship size and educational outcomes: those with fewer siblings outperform those with many. The...     

Learning,Interaction and Relationships as Components of Student Well-being: Differences Between Classes from Student and Teacher Perspective

The attitudes of students to their school, teachers and peers were investigated with 1,540 students in grade six from 30 schools and 78 classes. Using structural equation modelling, the students’ perceptions of well-being were investigated at class level using seven items with high reliability. Their well-being was dependent on at least three factors: students’ learning (seven items), student-to-student interaction (six items) and teacher–student relationships as described by students (ten items). Together, these factors explained 72 % of the variability of well-being between classes. The students’ well-being appeared to be significantly different between schools and between classes in the same school. The teachers’ opinions of their classes with the highest class score for well-being were compared with the lowest. The differences in the evaluation of the teachers’ own classes explain a number of critical issues which impact on educational outcomes. Students need to be aware of the combined effects of learning and socialisation.     

Ecological Risk Assessment,Prediction, and Assessing Risk Predictions

Ecological risk assessment embodied in an adaptive management framework is becoming the global standard approach for formally assessing and managing the ecological risks of technology and development. Ensuring the continual improvement of ecological risk assessment approaches is partly achieved through the dissemination of not only the types of risk assessment approaches used, but also their efficacy. While there is an increasing body of literature describing the results of general comparisons between alternate risk assessment methods and models, there is a paucity of literature that post hoc assesses the performance of specific predictions based on an assessment of risk and the effectiveness of the particular model used to predict the risk. This is especially the case where risk assessments have been used to grant consent or approval for the construction of major infrastructure projects. While postconstruction environmental monitoring is increasingly commonplace, it is not common for a postconstruction assessment of the accuracy and performance of the ecological risk assessment and underpinning model to be undertaken. Without this “assessment of the assessment,” it is difficult for other practitioners to gain insight into the performance of the approach and models used and therefore, as argued here, this limits the rate of improvement of risk assessment approaches.     

The trouble with foster care: the impact of stressful 'events' on foster carers

Summary The article draws on the first stages of a large-scale longitudinalstudy into foster care with 'looked after' children. It usesdata supplied by 950 foster carers in response to a postal questionnairedesigned to document the proportions who had experienced oneor more of six potentially stressful 'events': breakdowns ordisruptions, allegations, relationship with birth parents, familytensions, 'tug of love' cases, and other disagreements withsocial services. The article uses carers' comments to describetheir reaction to the 'events'. It then examines the relationshipbetween the 'events' and measures of carer stress, satisfactionwith fostering, and intentions to continue fostering. Overall,two-thirds of the sample had experienced one or more of these'events' and these were associated with a measure of mentalill-health and with attitudes towards continuing fostering.     

A Formal Restatement of Durkheim's "Division of Labor" Theory

Despite frequent references in the sociological literature to Durkheim's theory about the division of labor, sociologists have made few attempts to test it. The paucity of attempts and the very debatable outcomes thereof are due largely to Durkheim's use of the traditional discursive mode of theory construction. A discursively stated theory's logical structure is likely to be obscure, and for that reason alone tests of it are difficult and controversial. Rather than perpetuate the exegetical tradition in sociological treatments of the subject, this paper restates Durkheim's theory in accordance with a particular formal mode. That restatement identifies the theory's shortcomings and problems. But the eight premises imply only one testable theorem, and the theorem's predictive accuracy appears minimal unless "population concentration" is substituted for "density" in the first axiom. Nonetheless, the restatement clearly shows how extension of the theory (additional postulates) could further its testability.     

Intraindustry division of labor: The states of Mexico

Measures of occupational differentiation in each of eight industries vary markedly among the states of Mexico, a finding that is construed as evidence of territorial divergence in economic development. The relation among states between the relative size of an industry and the amount of occupational differentiation is direct for some industries but inverse for others. The interpretation is that industry size and intraindustry division of labor are directly related only to the extent that the labor force is concentrated territorially. Findings for the states of Mexico 1950 and 1960 are consistent with the interpretation.     

The Changing Nature and Context of Social Work Research

Summary Social work research is constantly diversifying and expandingand this article explores its changing nature; including changesto epistemology and practice; and the critical influence ofthe wider economic, political, theoretical and practice changesoccurring to social work itself. The author discusses a numberof issues facing social work research: the enduring conflictsof ways of knowing, doing and valuing social work research;the role of practitioners as researchers; and the challengeto empower service users as self-determining researchers.     

The Economic Impact of Space Weather: Where Do We Stand?

Space weather describes the way in which the Sun, and conditions in space more generally, impact human activity and technology both in space and on the ground. It is now well understood that space weather represents a significant threat to infrastructure resilience, and is a source of risk that is wide‐ranging in its impact and the pathways by which this impact may occur. Although space weather is growing rapidly as a field, work rigorously assessing the overall economic cost of space weather appears to be in its infancy. Here, we provide an initial literature review to gather and assess the quality of any published assessments of space weather impacts and socioeconomic studies. Generally speaking, there is a good volume of scientific peer‐reviewed literature detailing the likelihood and statistics of different types of space weather phenomena. These phenomena all typically exhibit “power‐law” behavior in their severity. The literature on documented impacts is not as extensive, with many case studies, but few statistical studies. The literature on the economic impacts of space weather is rather sparse and not as well developed when compared to the other sections, most probably due to the somewhat limited data that are available from end‐users. The major risk is attached to power distribution systems and there is disagreement as to the severity of the technological footprint. This strongly controls the economic impact. Consequently, urgent work is required to better quantify the risk of future space weather events.     

“Rigor for What?” Social Studies Teacher Conceptions and Enactments of Instructional Rigor

Taken from a larger qualitative study, this article argues that rather than an encompassing uniform definition, rigor, as understood and enacted by social studies teachers, exists on a complicated spectrum. Teacher placement on this spectrum was influenced by teacher life experience, teacher interpretation of student need, pedagogy employed, how content should be used, and the role of the teacher in the lives of students. How rigor is conceived and enacted by social studies teachers can have a profound impact on the types of citizens schools nurture and develop and the role school can play in the lives of students.