Premature mortality in the Republic of Ireland

Regional variations in the incidence of premature deaths between 1971 and 1981 arc examined by mapping standardised mortality ratios for deaths under the age of 65. Premature mortality is also examined with regards to the number of years of normal life lost by those who die prematurely, using a specially defined unfulfilled life index. Unfulfilled life and premature deaths arc found to have a higher incidence in the major urban areas and a lower incidence in western counties, although there are some interesting differences in their spatial distributions. Differences with regard to sex. age at death and cause of death are also examined.     

Austin白垩层的水平井井距衰竭状况及加密潜力

Ａｕｓｔｉｎ白垩层业已钻了４５００多口侧向井，本文着眼于Ａｕｓｔｉｎ这些侧向井估算的最终采收率。通过估算每口井的采收率、钻井密度以及直井生产的影响，计算出桶／英亩的采收率。然后分析了衰竭驱动及加密潜力的资料。应用人工神经网络，对所选地区作进一步研究。网络已经建立，并已用来研究诸如侧向长度，首次开采日期、Ａｕｓｔｉｎ白垩层构造等参数对采收率值的影响。用所选地区所作的详细分析对研究方法区域和研究结果作     

地体构造研究进展——第四届国际环太平洋地体会议侧记

从第四届国际环太平洋地体会议可以看出,地体构造的研究范围不断扩大,地体构造的概念进一步完善.目前研究的重点是西太平洋沿岸和澳大利亚地区.在研究方法上,放射虫的研究和地球物理资料及同位素地球化学方法的使用具有重要意义.中国的地体研究以东部沿海进展最快;大陆内部造山带也越来越受到重视,并取得了一批研究成果.     

数字地理信息工作组和国际地理信息系统标准

为了降低国家生产的数字地图和纸质地图的价格，在国际上进行地理数据结构的标准化工作很有必要。为此，在１９８３年成立了数字地理信息工作组，以制定必要的国际地理信息交换标准。目前，该工作组的成员有：比利时，加拿大、丹麦、法国、德国、意大利、荷兰、英国和美国。     

加拿大安大略省萨德伯里附近的Ni—Cu冶炼厂关闭20年后土壤化学特征…

近一个世纪以来，萨德伯里地区的自然生态系统受到了不同类型的采矿活动，包括三个Ｎｉ－Ｃｕ冶炼厂生产活动的影响。在１９７２年，Ｃｏｎｉｓｔｏｎ冶炼厂关闭前，由于大量ＳＯ２的排放，使靠近该厂的土壤严重酸化，并含有高浓度的Ｎｉ和Ｃｕ。１９９２年在该地区重复采样并与１９７２年采样的数据对比发现，冶炼厂周围７ｋｍ范围内的土壤中Ｎｉ，Ｃｕ和氢离子的浓度已显著降低。这些土壤中有机物质的低百分数比过去２０年也进一步     

Persistent organic pollutants and stable isotopes in biopsy samples (2004/2006) from Southern Resident killer whales

“Southern Resident” killer whales include three “pods” (J, K and L) that reside primarily in Puget Sound/Georgia Basin during the spring, summer and fall. This population was listed as “endangered” in the US and Canada following a 20% decline between 1996 and 2001. The current study, using blubber/epidermis biopsy samples, contributes contemporary information about potential factors (i.e., levels of pollutants or changes in diet) that could adversely affect Southern Residents. Carbon and nitrogen stable isotopes indicated J- and L-pod consumed prey from similar trophic levels in 2004/2006 and also showed no evidence for a large shift in the trophic level of prey consumed by L-pod between 1996 and 2004/2006. ∑PCBs decreased for Southern Residents biopsied in 2004/2006 compared to 1993–1995. Surprisingly, however, a three-year-old male whale (J39) had the highest concentrations of ∑PBDEs, ∑HCHs and HCB. POP ratio differences between J- and L-pod suggested that they occupy different ranges in winter.     

Responses of benthic macroinvertebrates to thin-layer disposal of dredged material in Mississippi Sound, USA

Benthic community responses to thin-layer disposal of dredged material were assessed at three sites in Mississippi Sound, USA. Community composition differed between disposal and reference sites (ANOSIM) for each disposal event. Oweniid sand worms, Amphinomid fire worms, and brittle stars (Ophiuriodea) contributed the most to community distinctions between disposal and reference sites (SIMPER), with higher abundances at the disposal sites. Total infaunal abundance was similar to pre-disposal and reference conditions within 3-10 months of thin-layer disposal. Distinctions in community composition between disposal and reference sites (nMDS) persisted throughout the 16-month study period, but were less pronounced at the site where sediment composition was unchanged by disposal. Size distributions of some taxa (e.g., gastropod and hemichordate) suggest adults recolonized the newly deposited sediments either through vertical migration or lateral immigration from adjacent areas. Thin-layer disposal offers a viable alternative to conventional open-water disposal practices and warrants further exploration for other areas with deeper bathymetries and different hydrodynamic regimes.