Anticipated dependence: A determinant in an integrative model of power relations among elderly couples

The study proposes an integrative, multivariate model for analysis of conjugal power relations among elderly married couples, from the perspective of the husband. The conceptual framework of the model is based on the well-known Resource Theory. However, in addition to the resources examined in other studies (e.g., economic and social resources), this model considers the husband's anticipated dependence on his wife as a potential factor that may explain conjugal power relations. The integrative model was tested on 211 elderly husbands in Israel. It was found that the primary variables explaining conjugal power relations in late adulthood are psychological-expressive in nature. Instrumental-economic resources were not found to have any explanatory power in the late stage of life. Traditional attitudes of the husband regarding the capacity of women to fulfill roles outside of the home correlated positively with his perceived power in the marital relationship. The findings indicate that the Resource Theory may be expanded and that anticipated dependence can be incorporated as a potential resource affecting current power relations among elderly couples.     

Explaining fathers' involvement in childcare: an ecological approach

The study was conducted among a sample of 113 Israeli fathers, and aimed to examine the variables that explain paternal involvement in care of children between the ages of one and six. Based on Bronfenbrenner’s ecological approach, the study examined the contribution of variables representing three ecological systems of the fathers: the ontogenic system – the fathers' background variables, and their childhood experiences with paternal involvement; the microsystem – children’s characteristics (age and temperament); and mothers' characteristics (education, hours of work outside of the home, and fathers' assessments of maternal gatekeeping); and the macrosystem – type of community of residence (rural or urban). Maternal gatekeeping most significantly explained paternal involvement in most of the domains of childcare that were examined. Fathers living in urban communities who assessed their wives' maternal gatekeeping as high tended to be more involved in the domain of physical care than their counterparts living in rural communities. The child’s temperament explained paternal involvement in the domains of showing love and playing with the children, whereas the fathers' childhood experiences with paternal involvement were related to their involvement in the domain of physical care. The implications of the findings for families and communities are discussed.     

Greenhouse gases and green roofs: carbon dioxide and methane fluxes in relation to substrate characteristics

Green roof systems have been increasingly implemented to enhance vegetation cover and associated ecosystem services in urban spaces, with primary goals being the reduction of peak surface runoff, enhanced water quality, and mitigation of urban heat island effects. Recently, green roofs have also received attention as a means to enhance carbon sequestration, but direct measurements of greenhouse gas fluxes from established green roof systems are largely lacking. Here we present observations of CO₂ and CH₄ fluxes from substrates of experimental extensive green roof units that varied in vegetation type (Sedum spp., and a native meadow species mix), substrate depth, substrate type (high vs. low organic matter content), and irrigation. We predicted that substrate CO₂ effluxes would be higher in high-organic-matter substrates and that systems with high organic matter would potentially act as CH₄ sources. Substrate fluxes were low compared to natural soils, with seasonal means ranging from an efflux of 0.1–0.4 µmol CO₂ m^-2.s^-1 and uptake of ~0.00–0.04 nmol CH₄ m^-2.s^-1, with higher fluxes late in the growing season. CO₂ fluxes showed large increases in response to irrigation and were higher from the high-organic-matter substrate and with increased substrate depth. The strength of the CH₄ sink increased in response to prior irrigation treatments, and CH₄ emissions were detected only on low-organic-matter substrates early in the growing season. No effects of vegetation type were detected for either CO₂ or CH₄ flux. Our results indicate that high levels of organic matter in green roof substrates may enhance aerobic soil respiration but are not associated with CH₄ emissions, which instead were only detected in low-organic-matter substrates.