Species richness and altitudinal variation in the aquatic metazoan community in bamboo phytotelmata from north Sulawesi

We compared the aquatic metazoan community structure in bamboo stumps between a lowland (Kosinggolan; 200 m a.s.l.) and a highland site (Moat; 1030–1050 m a.s.l.) in North Sulawesi. The lowland bamboo stumps harbored 38 taxa including 2 predators, and the highland stumps harbored 35 taxa including 2 predators. In total 45 taxa were recorded, including 3 predators. Dominant detritivores were Tipulidae, Scirtidae, Chironomidae, Culicidae and Ceratopogonidae. The sole dominant predators wereToxorhynchites mosquito larvae, which occurred in 67% and 28% of stumps at the lowland and the highland sites, respectively. Although the mean biomass per stump did not differ significantly between the sites, the mean number of species per stump was significantly smaller at the lowland site. In addition, the variation in species composition among stumps was greater at the lowland site than at the highland site. Among dominant taxonomic groups, the number of non-predatory culicid species per stump was smaller at the lowland site where their predator,Toxorhynchites, was more abundant, although both sites had the same number of culicid species. In the presence ofToxorhynchites, the density and biomass of other culicids per stump were reduced significantly. The difference in predator density might affect differences in the local-scale community structure of individual bamboo stumps.     

Effects of parasitoid community structure upon the population dynamics of the honeysuckle leafminer,Chromatomyia suikazurae (Diptera: Agromyzidae)

Population dynamics of a leafminer,Chromatomyia suikazurae (Agromyzidae, Diptera) and its parasitoid community were studied for ten years at seven natural populations along an altitudinal gradient in Japan. This species which mines leaves of a forest shrub,Lonicera gracilipes (Caprifoliaceae), was attacked by 25 hymenopterous parasitoid species. Annually, the parasitoid community structure varied less within a population than among populations. The seven parasitoid communities were clustered into three groups corresponding to the altitudinal gradient: (a) lowland communities dominated by late-attacking, generalist pupal idiobiont eulophids and with highest species diversity, (b) hillside communities dominated by an early-attacking, specialist larval-pupal koinobiont braconid and (c) highland communities dominated by an early-attacking, generalist larval idiobiont eulophid. Annual changes of the host larval densities among the local populations were largely synchronous rather than cyclic. Among these populations, host density levels and mortality patterns greatly varied. By analyzing these inter-populational differences of host mortality patterns, the following conclusions were drawn: (1) The host mortality patterns were determined by the host utilization patterns of the locally dominant species. (2) The host pupal mortality but not larval mortality was related to species diversity but not to species richness itself of each parasitoid community. (3) Density dependence was detected only in pupal mortality at a lowland population dominated by late-attacking pupal parasitoids. These results suggest that interspecific interactions of parasitoids add additive effects to host population dynamics dissimilarly among local populations with different parasitoid communities.     

A community viability indicator for determining comprehensive planning policy

To assist in the development of planning policy for communities, a pilot test of a social viability indicator was conducted in a Baltimore City, Maryland Polish ethnic neighborhood in 1969 and 1981. The viability indicator, originally developed by Herbert Gans and modified for the purpose of this study, can be an important instrument for analyzing and developing public policy, and maintaining viable communities. The indiced revealed that the study area, which had slightly less sound physical residences than the city in general, had viable interdependent social relationships between the residences than the city in general, had viable interdependent social relationships between the residents. Twelve years later the area was restudied. The study area was still socially viable as originally predicted although physical structures evidence a slight increase in deterioration. The findings give evidence that neighbothood viability does not depend on a neighborhood's physical environment and thus substantiates Gans' hypothesis which had not been previously tested with a longitudinal study.     

The Gender of “Energy”: Language,Social Theory,and Cultural Change in Women’s Lands in the United States

Within women’s intentional communities, women use the phrase women’s energy to describe certain social interactions, a sense of community, and ideas about how gender is done or performed. For example, energy can express both difference in communication style between men and women and male dominance in social situations. During my fieldwork in these communities, I explored how this phrase suggests a reference to a precultural female body, but it is also sometimes used to explicitly reject biological reasons for gender difference. The term is easily understandable to a wide range of women from varying class backgrounds and encompasses both the unconscious side of social interactions and a possibility for future change.     

The effects of migrant remittances on population–environment dynamics in migrant origin areas: international migration, fertility, and consumption in highland Guatemala

International migration impacts origin regions in many ways. As examples, remittances from distant migrants may alter consumption patterns within sending communities, while exposure to different cultural norms may alter other behaviors. This paper combines these insights to offer a unique lens on migration’s environmental impact. From an environmental perspective, we ask the following question: is the likely rise in consumption brought about by remittances counterbalanced by a reduction in fertility in migrant households following exposure to lower fertility cultures? Based on ethnographic case studies in two western highland Guatemalan communities, we argue that the near-term rise in consumption due to remittances is not counterbalanced by rapid decline in migrant household fertility. However, over time, the environmental cost of consumption may be mitigated at the community level through diffusion of contraception and family planning norms yielding lower family size.     

Patterns of residential segregation within a metropolitan ghetto

The residential segregation of families by income and by stage of the family life cycle within Milwaukee’s black community resembles in both pattern and degree that in the white community. The greater the difference in income, the more dissimilar are the distributions by census tract. Dissimilarity is greater between younger couples without children and older couples with children than between any other pair of family types defined by husband’s age and presence of children. However, segregation by income was substantially greater than by family type in 1960. The bases of selectivity of blacks in“changing” areas of the city, where the proportion black is still relatively low, and of whites in the“suburban” areas adjoining the city are similar. Families in the higher income groups and couples with children are over-represented in these areas. It would appear that given the pressures of limited housing space in the inner core of the black community, given the fact that certain amenities are not available in that area, and given the economic and social barriers which restrict the movement of blacks into the suburbs, the changing areas must function as“suburbs” for the black community.     

Can expanding access to basic healthcare improve children's health status? Lessons from Indonesia's 'midwife in the village' programme

In the 1990s, the Indonesian government placed over 50,000 midwives in communities throughout the country. We examine how this expansion in health services affected children's height-for-age. To address the problem that midwives were not randomly allocated to communities, the estimation exploits the biology of childhood growth, the timing of the introduction of midwives to communities, and rich longitudinal data. The evidence indicates that the nutritional status of children fully exposed to a midwife during early childhood is significantly better than that of their peers of the same age and cohort in communities without a midwife. The former are also better off than children assessed at the same age from the same communities but who were born before the midwife arrived. Within communities, the improvement in nutritional status across cohorts is greater where midwives were introduced than where they were not. This result is robust to the inclusion of community fixed effects.     

Community Subjective Well-being,Personality Traits and Quality of Life Therapy

In this study, factors that are instrumental in improving individuals' aswell as communities' subjective well-being (SWB) and Quality of Life (QOL)such as positive and negative relationships, personality characteristics ortraits as defined by family members or spouse, perceptions of the future aslooking good, and psychological factors (such as congruency,thriving/resilience personality, belongingness, external and internal powerand psychoallostasis), demographic variables, and religion were examined.The findings indicate that congruency with one's community values andexpectations, belongingness, thriving personality, psychoallostasis andpositive relationships or closeness to people in one's community, and theperception of the future both for the individual and for the community asbright, are important indicators of Quality of life and increased Subjectivewell-being. Additionally, family or spousal ratings of personalitycharacteristics as desirable affected SWB only if the ratings correspondedto the individuals' rating. Path analysis indicate that the high levels ofhappiness experienced by people living in Individualistic-sub-collectivisticcultures such as Appalachia is strongly linked to communal homeostasis andpsychoallostasis lifestyles prevalent in these communities. Implications ofthese findings to Quality of life therapy (QOLT) and healthy psychology atboth the individual level and community level are discussed.     

Community action in Alabama's Black Belt Timber-Dependent communities

The current decline in the economic well-being of the residents of the Alabama's Black Belt communities is well documented. High poverty rates, limited job growth, falling real per capita income, and increased out-migration are signs of current economic problems. With the resurgence of interest in promulgating self-help and community action mechanism at the local, state, and national levels, the purpose of this research is to examine collective community action by local officials in the Black Belt Timber Dependent communities to meet the social and economic well-beings of local residents. Data from the case study research indicate that race is the primary factor in actions with a collective dimension in Forestville. Inequality based on race suppresses interaction among the residents whose lives and well-being are in fact tied together ecologically; and, without interaction, collective local action cannot exist. The community has not been hospitable to African Americans because they are viewed or seen as social inferiors and this view is expressed by many whites who grew up in the community. The white leadership discouraged collective action in order to maintain its hegemony in the community. The African Americans with political power have no resources and great exertion is needed to change established community relationships. In Forestville, racial and ethnic cleavages makes collective community actions to levelop local business and industry and human services impossible. Implications of the research findings are discussed.     

Sex preference for children in a Meifu Li community in Hainan,China

Sex preferences for children are contingent on institutional and economic contexts, including family system. While the patrilineal joint family system of the Han Chinese tends to devalue daughters, the family systems of many of China's southern minorities are conducive to female autonomy and more equal sex preferences. The Li of Hainan Island provide an example. We examined household registers and surveyed women in a relatively isolated highland township inhabited by the Meifu, a Li sub-group. The Meifu depend largely on swidden agriculture, permit considerable sexual freedom to adolescent females, and, as expected, have more equal sex ratios among their children than other Hainan populations. There was a tendency for a preference for males in the one hamlet in the community with an exceptional endowment of irrigated land, suggesting that sex preferences are sensitive to local economic circumstances.     

广州人口老龄化与共享社区的构建

本文通过广州市不同时期、不同社区老年人口的研究 ,提出广州市社区人口老龄化的特征 :人口老龄化不但存在城乡差别 ,而且城市内部也存在差异 ;不同时期形成的社区以及不同地理区位的社区的人口老龄化也有不同之处。根据广州老龄化社区的现状 ,认为共享社区的构建要通过生存资源、发展机会、社会成果等方面的共享实现     

Objective quality of life indicators and the external validity of community research findings

We assessed how representative the objective quality of life in our research community was in order to provide a basis for judging the external validity of environmental-behavioral research findings that will emerge from future investigations. We also provided a methodology of evaluation that could be duplicated by other community study groups. The central city and county units of a U.S. Midwestern metropolitan area were categorized into four geographic reference zones with structural attributes that differentiated them along a city-suburban-rural continuum. Within this geographic frame-work, we were able to evaluate how eleven major categories of our community's quality of life compared, and to unambiguously assign the community's quality of life a position along the city-suburban-rural continuum.     

Sense of Belonging to Specific Communities and Depressive Symptoms Among Australian Gay Men

Sense of belonging to the general and broader gay communities has been shown to be beneficial for gay men’s mental health. This research investigated the interrelations between sense of belonging to three forms of gay community (the broader gay community, gay groups, and gay friends), sense of belonging to the general community, and depressive symptoms by examining a path model. A community sample of 177 gay men, aged 18 to 79 years, completed the Sense of Belonging Instrument–Psychological subscale, the Centre for Epidemiological Studies–Depression Scale, and the Sense of Belonging within Gay Communities Scale. The model provided excellent fit to the data in which sense of belonging to the general community mediated the relationships between a sense of belonging to gay groups and with gay friends and depressive symptoms. Results imply that enhancing gay men’s sense of belonging to gay groups and with gay friends is likely to be associated with fewer depressive symptoms, by virtue of their enhanced sense of belonging to the general community.     

Indirect interactions in aphid–parasitoid communities

Indirect interactions between populations of different species can be important in structuring natural communities. Indirect effects are either mediated by changes in population densities (trophic or density-mediated effects) or by changes in the behavior of species that are not trophically connected (behavioral or trait-mediated effects). We reviewed the literature on aphids and their parasitoids to explore the various possible indirect interactions that can occur in such communities. The review was motivated by our study of a particular aphid–parasitoid community in a natural (i.e., nonagricultural) habitat, and by the wealth of information that exists about aphid–parasitoid systems in agricultural settings. We focused our review on aphid–parasitoid interactions, but considered how these were influenced by the other aphid natural enemies and also by aphid mutualists and host plants. We conclude that indirect effects are likely to have a major effect in structuring aphid–parasitoid communities, and that the latter are a valuable model system for testing ideas about community interactions. Received: December 20, 1998 / Accepted: January 12, 1999     

Decision-Making Patterns and Contraceptive Use: Evidence from Uganda

Literature on the effect of decision-making patterns on contraceptive use often does not (1) distinguish between women participating in decisions and controlling them, and (2) account for effects of common decision-making patterns within the community. In Uganda where high fertility persists, both of these factors may be relevant to adoption of contraception. We used data from the 1995/96 Negotiating Reproductive Outcomes (NRO) Study which surveyed 1,750 women in 78 communities located in two districts in Uganda. We assessed the effects of individual and community factors on the adoption of modern contraceptive methods using multilevel logistic regression. We included measures of decision-making patterns at both the individual and community levels that distinguished husband-dominated, joint, and wife-dominated decision-making patterns. Contraceptive use is 29% more likely in communities where women more commonly have unilateral control over household decisions. This strong effect of normative decision-making patterns within the community is net of individual education and community education, both of which had strong and significant effects. Less traditional gender roles as measured by normative decision-making patterns seem to support more innovative fertility behavior. Community decision-making patterns matter importantly for contraceptive use in this low contraceptive prevalence setting and need to be assessed elsewhere. Further, women’s influence is inadequately measured where joint decision-making and wife-dominated decision-making are considered together.     

大城市候鸟式老人生活状况研究——以广州市为例

随着人口老龄化的发展,城市老年人的生活质量越来越受到社会的关注。而持续快速的城市化进程则催生了一个日益增多的特殊老年人群体：候鸟式老人。他们频繁地往返于原居住地与城市之间,其生活特点、需求与本地老年人有较大差异。本文选择了广州市外来移民较集中的穗园小区和中山大学小区为研究案饲．调查候鸟式老人在社区中的休闲生活状况,分析他们在原居住地和广州居住小区之间的活动差异,总结了城市候鸟式老人的特点。由此提出从城市、社区、家庭三个层面来改善城市候鸟式老人的生活状况。     

Contraceptive use in South Africa under apartheid

In this paper, patterns of contraceptive use among black South African women in the late 1980s are examined. Multilevel logit models are used to evaluate the extent to which segregation of the African population into homelands gave rise to uneven patterns of contraceptive use; how this pattern was shaped by variations in family-planning acceptability; and the way in which the system of male labor migration and social and economic inequities across communities affected women's use of contraceptives. Results show that variation in contraceptive use across homeland areas diminished with the addition of community controls for development and migration. Controlling for unobserved heterogeneity indicated that localized conditions could offset the advantages or disadvantages of living in a former homeland.     

The Risk of an Unwanted Birth: The Changing Context of Contraceptive Sterilization in the U.S.

Life-table estimates indicate that one-quarter of U.S. women intend no more births by age 25, one-half by age 27, and three-quarters by age 30. The resulting long period at risk of unwanted fertility is argued to be an important underlying dimension of the revolution in attitudes to and practice of sterilization. Life-table estimates are then considered of the timing of sterilization after the last wanted birth. Almost one-quarter of all couples select sterilization within the first year after they have had the number of children they desire. Recent experience would imply that four-fifths of all couples will eventually use contraceptive sterilization. In order to examine the determinants of men's and women's sterilization, logistic regression is used with a polytomous dependent variable: sterilization of the woman, sterilization of the man, or no sterilization within four years of the last wanted birth. Covariates considered are age and parity at last wanted birth, year and duration of marriage at last wanted birth, wife's and husband's education, wife's and husband's religion, whether residence is in a central city, region, pill-use history and timing-failure histories before the last wanted birth, and unwanted birth. Large and significant effects are found for most of these variables, and these effects change in interpretable ways between early innovative behaviour and sterilization during the most recent period when it was widely accepted.     

A Case for Developing Community Drug Indicators

The EU Action Plan on Drugs (2005?C2008) calls for member states of the European Union to provide information on five key epidemiological indicators. These are: general population surveys, prevalence and patterns of problem drug use, drug related infectious diseases, drug related deaths and mortality of drug users, and demand for drug treatment. The goal is to improve the comparability of data across the Member States, which is a central task of the EMCDDA (European Monitoring Centre for Drugs and Drug Addiction). Ireland has made progress on a national level in meeting this obligation. Currently the core information systems used to monitor the drugs problem in Ireland and to inform policy making are in the health and law enforcement areas including treatment, mortality and crime data. The dominance of such objective indicators and treatment outcome measures has contributed to obscuring the view of communities experiencing drugs problems on a day to day basis. The data are summations of the individual experience of drug problems and contribute little to understanding the broader question of how drug problem effect communities. This article draws on a community drugs study to review the contribution of traditional indicators of drug problems and consider some of the limitations of this data. It then presents an analysis of community data to identify possible community indicators of drug problems.     

The Effects of Children's Schooling on Fertility Limitation

Many theories of fertility predict that mass education reduces fertility, but this effect may be produced in a variety of ways. In this paper, microdemographic data from a rural community in Nepal, in which the spread of mass education and fertility limitation is just beginning, are used to examine these links. The analyses contrast the influence of parents' and children's educational experiences of parents' fertility preferences and behaviour. The results indicate that children's schooling has a strong influence on both fertility preferences and behaviour. The effects of parental schooling are weaker, and also inconsistent in different models. These findings provide support for theories that link mass education to the onset of fertility limitation through children's schooling experience.