Ecosystem services from converted land: the importance of tree cover in Amazonian pastures

Deforestation is responsible for a substantial fraction of global carbon emissions and changes in surface energy budgets that affect climate. Deforestation losses include wildlife and human habitat, and myriad forest products on which rural and urban societies depend for food, fiber, fuel, fresh water, medicine, and recreation. Ecosystem services gained in the transition from forests to pasture and croplands, however, are often ignored in assessments of the impact of land cover change. The role of converted lands in tropical areas in terms of carbon uptake and storage is largely unknown. Pastures represent the fastest-growing form of converted land use in the tropics, even in some areas of rapid urban expansion. Tree biomass stored in these areas spans a broad range, depending on tree cover. Trees in pasture increase carbon storage, provide shade for cattle, and increase productivity of forage material. As a result, increasing fractional tree cover can provide benefits land managers as well as important ecosystem services such as reducing conversion pressure on forests adjacent to pastures. This study presents an estimation of fractional tree cover in pasture in a dynamic region on the verge of large-scale land use change. An appropriate sampling interval is established for similar studies, one that balances the need for independent samples of sufficient number to characterize a pasture in terms of fractional tree cover. This information represents a useful policy tool for government organizations and NGOs interested in encouraging ecosystem services on converted lands. Using high spatial resolution remotely sensed imagery, fractional tree cover in pasture is quantified for the municipality of Rio Branco, Brazil. A semivariogram and devolving spatial resolution are employed to determine the coarsest sampling interval that may be used, minimizing effects of spatial autocorrelation. The coarsest sampling interval that minimizes spatial dependence was about 22 m. The area-weighted fractional tree cover for the study area was 1.85 %, corrected for a slight bias associated with the coarser sampling resolution. The pastures sampled for fractional tree cover were divided between ‘high’ and ‘low’ tree cover, which may be the result of intentional incorporation of arboreal species in pasture. Further research involving those ranchers that have a higher fractional tree cover may indicate ways to promote the practice on a broader scale in the region.     

Awareness of publication guidelines and the responsible conduct of research

We have conducted a longitudinal survey of NIH-funded F32 postdoctoral fellows to determine if mandated instruction in the responsible conduct of research (RCR) has measurable effects on awareness of, attentiveness to, and behavioral judgments about research ethics and authorship and publication. Of 418 F32 fellows participating in the study, 50% were aware of and had referred to guidelines on authorship and publication practices while 50% were either unaware of or had not referred to guidelines. Groups were similar with regard to total number of peer-reviewed publications and total number of first author publications, years of research experience, years since completing their doctoral degree, and receipt of RCR training. The equal distribution of guideline awareness and use, and group similarities with regard to career development and achievement provided us with an opportunity to consider whether awareness of and use of guidelines is associated with broader judgments about author roles and responsibilities. The findings suggest that awareness and utilization of guidelines are, at best, only modestly associated with more ethically appropriate judgments and attitudes about author roles and responsibilities among novice F32's.     

Potential effects of antidepressant agents on the growth and development of children and adolescents

The regulatory bodies of both the United States and United Kingdom have issued cautionary statements about prescribing antidepressant medications to treat major depressive disorder (MDD) in children younger than age 18. Despite these cautions, antidepressant agents, particularly SSRIs and serotonin activators, are regularly used to treat MDD in this age group, and increasingly so in very young children. This article considers the possible effects of antidepressant agents on the growth and development of children younger than age 18 and provides recommendations for the use and careful monitoring of these medications, including screening for physiological effects, selfinjurious behavior, and suicidal ideation. Guidelines for use of antidepressant agents with these populations include incorporating medications into comprehensive, holistic treatment, assessing for onset of severe akathesia as a marker of increased risk for self-harm, and advocating for more clinical trials of these medications in different childhood age groupings.     

Stability and Change in an Urban Homeless Population

Few studies have produced the over-time observational data needed to draw valid conclusions about changes in urban homeless populations during the 1980s. One place for which such data exist is Nashville, Tennessee. An ongoing series of enumerations lends little support to Nashvillians' perception that the number of homeless in their city is growing rapidly. Enumeration results also (1) contradict expectations regarding the rise of "new homeless" groups and (2) show two types of spatial redistribution--from indoor to outdoor and core to peripheral locations--to be under way. The applicability of the enumeration methodology to other communities is discussed, as are the discrepancies between purported and measured demographic changes in homelessness.     

“Off balance sheet law”: Globalisation,accounting and democracy

Abstract

National governments commonly facilitate neo‐liberal globalisation by permitting private bodies to apply global commercial rules locally. The recent legislating of international financial reporting standards (IFRSs) in New Zealand is an important example of privatised lawmaking. IFRSs can be described as “off balance sheet law” because they do not appear on the statute books, yet have legal effects. This article draws on a broad conception of discursive democracy to demonstrate the fundamentally antidemocratic nature of privatised lawmaking that the legislating of IFRSs exemplifies. First, an outline is given of the organisations and processes involved in the legislation of IFRSs in New Zealand to demonstrate how privatised lawmaking works. Second, the importance of IFRSs is considered in the light of basic principles of discursive democracy. Finally, alternatives to standardisation are considered.     

Teaching outside of the box: a short-term international internship for pre-service and in-service physical education teachers

This article reports on results from a qualitative study of a two-week international internship for pre-service and in-service physical education (PE) teachers in a developing nation (Belize). Relying upon data from questionnaires that were administered before and after the short-term international internship, participants’ perspectives related to their professional and personal development were investigated. Understanding the overlap that necessarily exists between professional and personal growth, five themes are identified and discussed. These include: (1) Kids are Kids (Or are they?), (2) Relationships Matter, (3) Cooperation and Collaboration in Teaching: Learning Together, (4) Teaching without Bells and Whistles, and (5) Recognising One’s Own Privilege. In light of these findings, some suggestions for future practice and inquiry are offered.