Groundwater denitrification capacity and nitrous oxide flux of former fringing salt marshes filled with human-transported materials

While former salt marsh sites filled with human transported material (HTM) have altered the surface marsh ecosystem, if artificial drainage is absent, subsurface conditions may continue favorable for denitrification, a microbial process reducing nitrogen (N) export to estuaries. We used piezometer networks to evaluate the in situ groundwater denitrification capacity and nitrous oxide (N₂O) flux (with ¹⁵N-enriched nitrate-N via the push-pull method) in four former fringing salt marshes topped by HTM along the Rhode Island coast, U.S.A. Groundwater at these sites commonly interacted with the buried marsh horizon and the HTM. In situ groundwater denitrification capacity site means ranged from 15.2 to 71.7 μg?N?kg^?1d^?1 with no significant differences between sites due to high intrasite variability. The site with the highest and most consistent denitrification capacity also had HTM of the finest texture and highest soluble organic carbon. Three of four sites had minimal N₂O flux [mean N₂O:(N₂O + N₂)?=?0.082] while the final site had N₂O generation rates up to 52.5 μg?N?kg^?1?d^?1. The site with the highest N₂O contributions also had the lowest ambient groundwater nitrate-N indicating lack of priming for N₂O reduction to N₂. Former salt marshes with HTM deposits may still have the capacity for substantial groundwater denitrification capacity, similar to that observed in undisturbed salt marshes, but may also contribute substantially to global N₂O emissions. For both salt marsh restoration and greenhouse gas mitigation efforts, attention should be given to ensuring that a tidally-driven, fluctuating water table regularly intercepts the buried organic horizons of the filled salt marsh.     

“I Think it Would Be a Very Sensitive Topic …” School Social Work,Gender Variance,and the Silencing of Differences

This article discusses an “orientational” study of the perceptions of school social workers regarding gender-variant students and the impact of their presence on the discourse about gender identity. The findings indicate that gender-variant students are becoming more known and visible in public schools but that they do not make up a homogeneous group. Moreover, the study seems to show that the discourse about gender remains extremely limited, in part due to a linking of gender identity with sexuality.     

Between skepticism and empowerment: the experiences of peer research assistants in HIV/AIDS,housing and homelessness community‐based research

People living with HIV/AIDS (PHAs) in Canada are a highly researched population, yet their inclusion in the research process is minimal. Community‐based research (CBR) has become a recognized tool for addressing issues of power and exclusion within researcher/community relationships by inviting the community's equitable involvement as research partners. Within the context of HIV/AIDS research, this includes a commitment to the Greater Involvement of People Living with HIV/AIDS (GIPA) at all stages of the research process. One way of adopting GIPA principles within CBR is through providing employment, research training, and capacity building opportunities for PHAs as peer research assistants (PRAs). Drawing on data from two in‐depth focus groups with seven PRAs from the Positive Spaces, Healthy Places: Community‐based Research Study, this paper will highlight important methodological practices for academic and community‐based researchers who are working with and supporting PRAs.     

Nationality and the European union competing identities in the visual design of four European cities 1

In this study, we integrate visual and linguistic research to analyze the relationship between a city's regional, national, transnational, and European identities as the face of four cities depicts it. We explore the cultural identity of Brussels, Luxembourg, Munich, and Dortmund through the study of public signs found in these cities. We examine how the choice of language, layout, typography, accompanying images, and positioning of city signs reflect the tensions involving the change from a national or regional identity to a Pan‐European identity. Our methodology combines an ethnographic approach and neutral observations with interviews of city inhabitants. By combining interpretive analysis with a meta‐discursive approach to how signs are read and perceived, we consider both the production and reception ends of the signs.     

Girls@Play

This paper reports on findings from a three-year, Canadian federally funded research project entitled “Education, Gender and Gaming” in which we documented the play practices of girls and boys playing console-based games. We show, in particular, how many of the presumptions and assumptions about “girls playing games” simply do not hold over time, or given a particular context. We therefore attempt to show how our research practices and methodologies help to shape what we have thus far taken as “evidence” or “facts” about gender and illustrate how some of those presumptions might not necessarily hold over time or given different contexts.     

Renovating ethnic identity on Restaurant Makeover

Food can be a novel way of understanding and explaining some of the pointed paradoxes of multiculturalism and the ‘management’ of ethnicity. Many studies of culinary culture are attentive to the exoticization of ethnicity in and through food media, which now includes a vertiginous array of cookbooks, travel literature, magazines and, most important for our purposes here, television series. Among various programs is Restaurant Makeover, a popular Canadian reality series broadcast on Home and Garden Television (HGTV) as well as the Food Network Canada. In each episode, dining experts are hired by struggling restaurateurs (often ethnic) to ‘spice up’ the existing menu, ‘modernize’ the décor and, by extension, ensure the welfare of the (immigrant's) family. While the series is not explicitly directed at ethnic restaurants, it seems to be increasingly interested in ‘non-white’ establishments (i.e., Mexican, Chinese, Thai, etc.). This participation in culinary multiculturalism may be symptomatic of wider political changes in immigration and ‘diversity’ in Canada. Based on the authors analyses of specific episodes this paper argues, firstly, the growing interest in ethnic cuisine on Restaurant Makeover can be read as a (neo)liberal response to an emerging conservative ‘multicultural’ agenda that recognizes migrants predominantly as laborers (as opposed to citizens) and, secondly, that behind its rehearsal of liberal benevolence is a skewed set of power relations that authorize the experts’ (re)construction, cultivation and containment of ethnicity.     

Breast feeding,fertility and infant mortality: An analysis of some early German data

Concern about high infant mortality and its suspected connection with the lack of breast-feeding stimulated the collection of statistics about the frequency of breast-feeding in several German states during the late roth and early 20th centuries. Contrary to the assumption that universal and extended breast-feeding is customary among rural agricultural populations, large regional variations existed both in the proportion of children who were breast-fed and in the average duration of the period for which they were breast-fed. An analysis of these data in connection with statistics of infant mortality and marital fertility confirms the association between high infant mortality and the absence of breast-feeding. An hypothesis linking breast-feeding and fertility, however, is not confirmed. Marital fertility appears to be much more closely associated with infant mortality than with breast-feeding.     

What is Most Important: Social Factors, Health Selection, and Adolescent Educational Achievement

This paper explores the relative importance of social factors and health measures in predicting educational achievement in early and late adolescence using population-based administrative data. The sample was made up of 41,943 children born in Manitoba, Canada between 1982 and 1989 and remaining in the province until age 18. Multilevel modeling nests each individual (level 1) within a family (level 2) residing within a neighborhood (level 3). Most important in predicting adolescent achievement were a broad socioeconomic status index (and a narrower measure of household income), being on social assistance, mother’s age at first birth, gender, residential mobility, the presence of ADHD/Conduct disorders, and measures of family functioning (child taken into care or offered protection services and family structure history). Family size, birth order, and newborn characteristics (birthweight, APGAR, gestational age) were statistically significant but of little importance in explaining the outcomes. Both examining regression coefficients and systematically omitting variables showed social factors (often emphasized by epidemiologists) to have markedly greater effects than the combination of health measures (often stressed by economists) in predicting achievement. However, mental health in childhood is identified as among the important predictors. Record linkage across population datasets from health, education, and family services ministries allowed: tracking health and educational attainment at different times in a child’s life, following a large number of cases across childhood, considerable sensitivity testing, controlling for unmeasured family and neighborhood effects, generating an extensive list of predictors, estimating effect sizes, and comparing Manitoba results with those of well-known American studies.