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191.
Daily mortality in the Philadelphia metropolitan area and size-classified particulate matter 总被引:2,自引:0,他引:2
Lipfert FW Morris SC Wyzga RE 《Journal of the Air & Waste Management Association (1995)》2000,50(8):1501-1513
Time-series of daily mortality data from May 1992 to September 1995 for various portions of the seven-county Philadelphia, PA, metropolitan area were analyzed in relation to weather and a variety of ambient air quality parameters. The air quality data included measurements of size-classified PM, SO4(2-), and H+ that had been collected by the Harvard School of Public Health, as well as routine air pollution monitoring data. Because the various pollutants of interest were measured at different locations within the metropolitan area, it was necessary to test for spatial sensitivity by comparing results for different combinations of locations. Estimates are presented for single pollutants and for multiple-pollutant models, including gaseous pollutants and mutually exclusive components of PM (PM2.5 and coarse particles, SO4(2-) and non-SO4(2-) portions of total suspended particulate [TSP] and PM10), measured on the day of death and the previous day. We concluded that associations between air quality and mortality were not limited to data collected in the same part of the metropolitan area; that is, mortality for one part may be associated with air quality data from another, not necessarily neighboring, part. Significant associations were found for a wide variety of gaseous and particulate pollutants, especially for peak O3. Using joint regressions on peak O3 with various other pollutants, we found that the combined responses were insensitive to the specific other pollutant selected. We saw no systematic differences according to particle size or chemistry. In general, the associations between daily mortality and air pollution depended on the pollutant or the PM metric, the type of collection filter used, and the location of sampling. Although peak O3 seemed to exhibit the most consistent mortality responses, this finding should be confirmed by analyzing separate seasons and other time periods. 相似文献
192.
193.
Johanna J. Vollenweider Ron A. Heintz Lawrence Schaufler Robert Bradshaw 《Marine Biology》2011,158(2):413-427
Quantifying the nutritional quality of forage fish is integral for understanding upper trophic levels as forage fish are the
dominant prey for top predator fish, marine mammals, and sea birds. Many existing reports documenting body composition of
forage species are not comparable due to confounding effects. This study systematically assessed the variability in proximate
composition and energy content of 16 forage species in southeastern Alaska (57.2626 N/133.7394 W) between 2001 and 2004. Variation
in energy and lipid contents was related to habitat, epipelagic planktivores varying most, mesopelagics intermediate, and
demersal species relatively invariable. Season was the greatest source of variation as a result of short growing seasons at
high latitude and energy allocation strategies for reproduction and growth. Among species that varied seasonally, energy and
lipid increased over summer and declined during winter. Annual differences in body composition occurred during periods of
peak energy content. Sampling recommendations and guidance for bioenergetics models are provided. 相似文献
194.
This study analyses disparities in the provision of environmental services in Jerusalem, specifically through the distribution of recycling bins. The allocation of recycling bins in Jerusalem is uneven. Some neighbourhoods have more than their share of infrastructure, while others do not have any recycling bins at all. The spatial distribution of recycling bins throughout the city is analysed across the ethno-religious and socioeconomic divides, enabling us to determine whether the opportunity to recycle is a right or a privilege. The findings demonstrate that the Arab areas are literally not serviced. Ultra-Orthodox (Haredi) Jewish neighbourhoods are discriminated against unless socioeconomic levels and population size are controlled. Therefore, waste-management policies reproduce social inequalities resulting in environmental injustice. Due to the fact that recycling in Jerusalem is voluntary and not obligatory, and that in general the public wants to recycle, the opportunity to recycle is indeed a privilege. 相似文献