Are the closed landfills recovered habitats for small rodents? A case study in a riparian site,Buenos Aires,Argentina

The establishment of landfills in urban areas leads to extensive disturbances. Their development after landfill closure depends on the characteristics of the soil cover, the surrounding communities and the dispersal of plants and animals. This study was carried out in a landfill closed in 2004, surrounded by an urban area, freshwater marshes and a riparian forest. The aim of this study was to determine the role that the closed landfill may play in maintaining rodent communities typical of this zone and its relation to characteristics of the sites. Four rodent and plant samplings were carried out from December 2005 to September 2006 at five sites inside the landfill: three filled cells and two areas of the riparian margin. We recorded a total of 433 individual rodents. The rodent community of the closed landfill included species typical of rural, riparian and rural habitats: Akodon azarae (358), Oligoryzomys flavescens (32), Deltamys kempi (14), Rattus rattus (14), Cavia aperea (11) and Scapteromys aquaticus (4). Rodent species composition varied among sites, but A. azarae was usually the dominant species. We found a rich rodent community mostly composed of wild species. The relictual riparian margin may have served as a major refuge for native rodent community while the landfill was in operation, and after closure it possibly acted as a source for some species to colonize the covered cells.     

The Gendered Effects of Divorce on Mothers’ and Fathers’ Time with Children and Children’s Developmental Activities: A Longitudinal Study

How divorce influences parents’ and children’s time use has received very little scientific attention. This study uses high-quality longitudinal time-diary data across six waves from the Longitudinal Study of Australian Children to examine how parental separation shapes parent–child time and children’s daily activities. Results show that separation leads to a strong increase of gender inequalities in parents’ time use. After separation, mother–child time doubles, two-parent time declines by three, and father–child time remains low. Parental separation also leads to a decline in children’s time allocated to educational activities (e.g., studying, reading) and an increase in children’s time in unstructured activities (e.g., TV watching, video gaming, smartphone use). Additionally, the effect of separation on children’s time use is twice as large for boys than for girls, with gender gaps in children’s unstructured time increasing over time. Finally, mother–child time returns to similar pre-separation levels over time, but only after 4 years since separation occurred. The study findings are robust to different panel regression strategies. Overall, this study implies that parental divorce negatively affects children’s developmental time use, especially among boys, and leads lone mothers to experience increasing ‘time penalties’ associated with gender inequalities in society.     

The Benefits of Diversity in Education for Democratic Citizenship

The social science statement in Brown v. Board of Education (1954) stressed that desegregation would benefit both African American and White children. Eventually, it was recognized that integration, rather than mere desegregation, was important for benefits to be realized. A parallel argument is made in the legal cases concerning affirmative action in higher education: educational benefits of diversity depend on curricular and co-curricular experience with diverse peers, not merely on their co-existence in the same institution ( Gurin, P., 1999 , Gurin, Dey, Hurtado, & Gurin, 2002 ). Positive benefits of diversity were demonstrated in a study comparing students in a curricular diversity program with students in a matched control group ( n = 174 ), and in a longitudinal survey of University of Michigan students ( n = 1670 ) .     

SYSTEMIC AND IDIOSYNCRATIC SOVEREIGN DEBT CRISES

The theoretical literature on sovereign defaults has focused on adverse shocks to debtors' economies, suggesting that defaults are of an idiosyncratic nature. Still, sovereign debt crises are also of a systemic nature, clustered around panics in the financial center, such as the European Sovereign Debt Crisis in the aftermath of the US Subprime Crisis in 2008. Crises in the financial centers are rare disasters and, thus, their effects on the periphery can only be captured by examining long episodes. In this paper, we examine sovereign defaults from 1820 to the Great Depression, with a focus on Latin America. We find that 63% of the crises are of a systemic nature. These crises are different. Both the international collapse of liquidity and the growth slowdown in the financial centers are at their core. These global shocks trigger longer default spells and larger losses for investors.     

Nesting ecology of mourning doves in an urban landscape

The expansion of urban areas into native habitat can have profound effects on avian populations and communities, yet little is known regarding the effects of urban features on avian reproductive success. The objective of this study was to examine the reproduction of an urban-enhanced species, the mourning dove, to determine how tree and urban landscape features affect nest-site selection and nest success. Mourning dove nests were located by systematically searching potential nest sites on a weekly basis from late-March through mid-September in 2003 and 2004. A total of 1,288 mourning dove nests were located and monitored on the Texas A&M University Campus. Of these nests, 337 (26.6%) were successful (fledged, ≥1). An equal number of potential nest sites were randomly generated in ArcGIS and assigned to non-nest trees to evaluate habitat variables associated with nest-site selection. Mourning dove nests were located in trees with a larger canopy diameter and diameter at breast height (DBH) than the computer generated potential nests and nest trees were located closer to roads and farther from buildings than non-nest trees. Within the study area, nest success was predominately influenced by the proximity of urban features with successful nests being located closer to roads and farther from buildings than unsuccessful nests.     

El Miedo y El Hambre: Understanding the Familial,Social, and Educational Realities of Undocumented Latino Families in North Central Indiana

This study explored how different ecological factors, within and outside the family, affected the educational success of the children of undocumented families. The sample consisted of 63 immigrant Latino parents (40 families) who resided in North Central Indiana. This study utilized an ethnographic research design. Findings demonstrated that immigration laws were affecting the educational success of the children of undocumented families. Most parents expressed lack of familiarity of the American educational system and that they had culture and language barriers. Findings also demonstrated that undocumented families were adapting to their realities, as a result of the resiliency in their families and communities. Implications for practice and future research were provided.