Slug grazing effects on seedling and adult life stages of North American Prairie plants used in designed urban landscapes

Designed vegetation is a major contributor to ecosystem service provision in cities, and as such the study of how herbivory and other ecological factors determine its capacity to deliver such services, is long overdue. This study investigated the effect of slug grazing on the establishment and development of 26 species of North American prairie forbs and grasses used in sown or planted naturalistic communities in urban greenspace. The experiment was designed to provide slugs with the opportunity to choose between the plant species used, to mirror the situation that prevails in public greenspace. Slug density was manipulated through baiting with metaldehyde at different frequencies. Seedlings of prairie species were more palatable to slugs than adults. Seedling establishment was significantly reduced in most species by slug grazing, with only seven species showing no significant increase in establishment in response to baiting with metaldehyde. In many species successful establishment was based on moderate-high unpalatability and large or fast growing seedlings. Adult prairie plants were typically more able to withstand slug damage, and once their shoots reached a certain size, grazing declined. This was not true of the most palatable species, which even as adults were eventually eliminated by grazing in the absence of baiting. Phenology plays an important role in the survival of adults, with early emerging species potentially subject to severe damage due to the limited availability of alternate food plants. As a group, prairie forbs are typically palatable to slugs, and unlikely to be persistent in the most slug-rich urban situations.     

Dispositions to Act in Favor of the Environment: Fatalism and Readiness to Make Sacrifices in a Cross‐National Perspective1

This article hypothesizes that individuals’ environmental attitudes depend not only on their knowledge, interests, emotions, and values but also on the social context in which they live. We test this hypothesis by analyzing the 2000/01 ISSP‐II Survey on Environmental Attitudes; the data include respondents from 23 countries. Our findings show that individual characteristics influence both “pessimistic environmental orientations” and “the willingness to act in favor of the environment.” As for social context, the level of development and affluence, the degree of political centralization, the presence of green movements and parties, and the degree of objective pollution in a country are all important. However, their influences on fatalism and willingness vary.     

THE POLITICAL ECONOMY OF U.S. WHEAT LEGISLATION

Both taxpayer subsidies to U.S. wheat producers and domestic deadweight losses increased as a result of the U.S. wheat program adopted in 1985. A calculation of the costs and benefits of alternative wheat policies shows that mandatory production controls with no taxpayer expense could have made wheat producers as well off as the adopted policy. Becker's theory of competition among interest groups and Peltzman's theory of the equilibrium amount of regulation are shown to be consistent with the observed policy choice if the list of fnfected interest groups includes agricultural input suppliers and grain marketing firms.     

Loss of Agro-Biodiversity, Uncertainty, and Perceived Control: A Comparative Risk Perception Study in Austria and China

The biogeographical centers of origin of important food crops-called Vavilov centers-are considered to be crucial sources of genetic diversity for present and future crop-breeding programs and thus for human food safety worldwide. Global environmental change and more intensified modes of crop production may cause genetic erosion (loss of traditional crop varieties and loss of crop wild relatives), especially in Vavilov centers. The present study focused on how the risk of genetic erosion (or loss of agro-biodiversity) is perceived in comparison to 16 other risk topics by experts and lay people in Austria and China. The most striking result was that genetic erosion was perceived to be an exceptionally unknown and uncertain risk topic, given that only genetically modified organisms (GMOs) were perceived as being even more uncertain. As a consequence of the high uncertainty, the idea of applying the precautionary principle to further prevent genetic erosion is discussed. An unprecedented finding-one that differs from Austrian participants-is that the Chinese have a higher perceived control over all risk topics. The increased perception of controllability in China is discussed in light of the theory of reflexive modernization. This theory strives to explain the increased critical attitude in Western countries such as Austria toward scientific innovations and toward the idea that everything can be calculated and mastered at will. By revealing different notions of risk perception, this research also provides additional scientific input to risk communication efforts for public education.     

Developing a community-based care system for seriously emotionally disabled children and youth

The needs of emotionally disabled children and their families are not optimally served within traditional mental health service delivery systems. Policies are inadequate, delivery systems are insufficient and underfunded, and supporting research is sparse. As communities begin addressing the needs of the seriously emotionally disabled child and family, planning should address community coordinated services. Such systems, however, are not easily established and maintained in communities accustomed to addressing children's needs in terms of existing fragmented categorical structures. National models exist but care and time are required to adapt critical elements from these models to local need. This article will review the rationale for integrated community-based, case management services for children and adolescents. A case example is offered illustrating issues affecting the development of one community support system.     

A robust modification of the ordered-heterogeneity test

An ordered heterogeneity (OH) test is a test for a trend that combines a non-directional heterogeneity test with the rank-order information specified under the alternative. We propose two modifications of the OH test procedure: (1) to use the mean ranks of the groups rather than the sample means to determine the observed ordering of the groups, and (2) to use the maximum correlation out of the 2^k???1 – 1 possibilities under the alternative rather than the single ordering (1, 2, … , k), where k is the number of independent groups. A simulation study indicates that these two changes increase the power of the ordered heterogeneity test when, as common in practice, the underlying distribution may deviate from a normal distribution and the trend pattern is a priori unknown. In contrast to the original OH test, the modified OH test can detect all possible patterns under the alternative with a relatively high power.     

Is There an Emotional Cost of Completing High School? Ecological Factors and Psychological Distress Among LGBT Homeless Youth

This study explored the nexus of home and school climate on the psychological distress of lesbian, gay, bisexual, and transgender (LGBT) homeless youth, as well as their experiences during high school. Of the LGBT homeless youth (N = 89) surveyed, 39.3% reported not completing high school. Most participants did not seek support from school staff nor did they report attending a school with a Gay-Straight Alliance. Significantly higher levels of psychological distress were found among high school graduates and those reporting LGBT harassment at home; however, harassment experienced at school was not statistically related to psychological distress. Findings are discussed.     

Homelessness as One Component of Housing Instability and Its Impact on the Development of Children in Poverty

The number offamilies with children living in poverty and experiencing housing instability and homelessness has increased dramatically over the last two decades. Current public policy decisions will lead to further increases. Understanding the impact of this instability on the emotional, behavioral, and cognitive development of children is imperative. Few studies cn'tically examine the effects ofinstability on both domiciled and homeless children. This research examined the effects of homelessness and housing instability on 133 children 8 to 12 years of age living in poverty. Results indicate that whether a child is currently homeless is not as significant as overall stability which may have a long ranging effect on a child's future development.     

Social and psychological resources among homeless youth: protection against risk for physical victimization?

ABSTRACT

This study examines child physical abuse, social and psychological resources, and street physical victimization among 150 homeless youth from the Midwest. Path analyses results show that males have higher self-efficacy than females, while older youth and those who experienced less child physical abuse reported higher self-esteem. Self-efficacy and self-esteem were positively associated with social support as was being younger and having experienced less child physical abuse. Younger respondents reported fewer difficulties obtaining basic necessities, and those who had less trouble finding these necessities experienced less street physical victimization. Females, younger youth, and those who experienced less child physical abuse reported lower rates of physical victimization. Agencies should be aware that many youth experiencing homelessness have trouble obtaining basic necessities, which increases risk for victimization. Moreover, the ability to obtain necessities appears to override the influential role of social support, further affirming the foundational importance of agencies helping youth meet their basic needs.