水源中央空调系统生命周期分析模型

以水源中央空调GHP1000为研究对象，通过确定功能单元、清单分析，提出了生命周期分析方法学模型，并对实际工作中发现的若干问题进行了讨论。     

润滑剂与环境污染

综述了润滑剂对环境的污染以及国外可生降解解润滑剂的发展状况，国内研制和开发可生物降解并对环境无害“绿色”润滑剂势在必行。     

Phenotype-dependent arrival time and its consequences in a migratory bird

Arrival times for migratory animals can be viewed as the result of an optimization process of costs and benefits of early arrival, and when the cost and benefit functions of early arrival depend on phenotypic quality, this will result in phenotype-dependent optimal arrival times. This hypothesis was tested for males of the migratory and sexually size-dimorphic barn swallow Hirundo rustica. The major cost of early arrival is poor environmental conditions which resulted in mortality of short-tailed early-arriving males in one year. The major benefits of early arrival are higher mating success, enhanced reproductive success, improved recruitment rates for offspring, and enhanced quality of the mate acquired. Annual variation in male arrival date is related to weather conditions at the breeding grounds, but also to some extent to weather conditions in the African winter quarters. Individual variation in arrival time can be explained by phenotype-dependent cost and benefit functions of early arrival. Male barn swallows with long tail ornaments arrived earlier than short-tailed males. The costs of early arrival should be particularly high under poor environmental conditions and lead to a stronger negative relationship between arrival date and phenotypic quality in years with poor environmental conditions. This prediction was confirmed by a stronger negative relationship between male tail length and date of arrival in years when arrival was relatively late because of poor weather. A female preference for early-arriving males may result in acquisition of good genes for optimal migratory behaviour, if migratory direction and extent have a genetic basis as shown in a number of different bird species.     

论环境风险及其管理制度建设

在阐明环境风险和环境风险管理的概念和内涵的基础上,叙述了中国面临的主要环境风险,提出了中国环境风险管理制度建设的建议.并着重指出,国家应当对重点风险源进行直接管理.     

Analysis of serpentinophytes from north-east of Portugal for trace metal accumulation--relevance to the management of mine environment

In north–east of Portugal, the serpentinized area is about 8000 ha with a characteristic geology and flora. The serpentine plant community and respective soils were analyzed to examine the trace metal budget in different tissues of the plants exhibiting resistance to trace metals. One hundred and thirty five plant species belonging to 39 families and respective soils have been analyzed for total Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn. Substantial amounts of Ni, Cr, Co and Mn were detected in plant tissues which are listed below: Ni: Alyssum serpyllifolium (38 105); Bromus hordeaceus (1467); Linaria spartea (492); Plantago radicata (140); Lavandula stoechas (118) and Cistus salvifolius (114); Cr: L. spartea (706.7); Ulmus procera (173.4); A. serpyllifolium (129.3); Cistus ladanifer (40.8); L. stoechas (29.5); P. radicata (27.81); Setariopsis verticillata (25.7); Plantago lanceolata (24); Digitalis purpurea (23.4); Logfia minima (23.1); Arenaria querioides (23); Hieracium peleteranum (22.7); Arenaria montana (14.5); Co: A. serpyllifolium (145.1); L. spartea (63.2); P. radicata (10.4); H. peleteranum (7.3); Lepidium heterophyllum (6.9); A. querioides (6.6); C. salvifolius (6.5); C. ladanifer (6.3); L. stoechas (6.1); Anthyllis lotoides (6.1); L. minima (6.1); Euphorbia falcata (5.7) and B. hordeaceus (5.6); Mn: A. serpyllifolium (830); L. spartea (339); L. stoechas (187.1); L. minima (182.7); Castanea sativa (125); Spergula pentandra (124); P. radicata (119); Cytisus striatus (115.4); Quercus pyrenaica (110); Teucrium scorodonia (109.4); Fraxinus vulgaris (109); Anthyllis sampaiana (108); Quercus ilex (108). The significance of serpentine flora, need for conservation of these fragile and environmentally invaluable plant resources for possible use for in situ remediation of metalliferous substrates are presented in this paper.     

Temporal variation of fluoride concentration in antlers of roe deer (Capreolus capreolus) living in an area exposed to emissions from iron and steel industry, 1948-2000

Temporal changes of environmental fluoride concentration in the industrialized area of Siegen, western Germany were assessed by studying the fluoride content of antlers (n=116) collected between 1948 and 2000 from the resident roe deer (Capreolus capreolus) population. During the analyzed period, major fluoride emission sources in the study area have been iron- and steelworks. Fluoride concentrations in the antlers ranged between 118 and 5428 mg/kg of bone ash. There was an overall increase in antler fluoride content from the late 1940s/early 1950s to the late 1950s/mid-1960s. Thereafter, antler fluoride levels overall steadily declined. For statistical analysis, the data were grouped into five periods (1948–1959, 1960–1969, 1970–1979, 1980–1989, and 1990–2000). Geometric mean fluoride concentrations of the samples ranged from 323 (period 1990–2000) to 2096 mg/kg of bone ash (period 1960–1969). Sample means for the periods 1980–1989 and 1990–2000, respectively, were always significantly lower than those of older samples. The decrease in antler fluoride concentrations during recent decades suggests a drop of ambient fluoride levels, that is hypothetically attributed to a reduction in the number of emission sources in the area and a decline of fluoride discharges from both local and more distant sources due to improved emission control measures. Comparison with antler fluoride data for other roe deer populations from western Germany further suggests that the roe deer from the Siegen area were recently exposed to an only moderate additional fluoride load from industrial sources. Studying antler fluoride concentrations is a convenient and cost-effective method of monitoring temporal changes in ambient fluoride levels.     

明确指导方针建立市场化机制推进环境保护与经济建设双赢

总述了“九五”期间我国环境保护主要成就,并明确指出“十五”期间环境保护的指导方针,指出为实现“十五”环境保护目标,推进环境保护与经济建设双赢,必须建立面向市场的环境保护机制,依靠科技创新,发展绿色经济。     

环境中内分泌干扰物质的研究概述

在总结最新文献的基础上，就环境中的内分泌干扰物质的概念，研究背景，研究方法，在环境中的分布情况作了简单综述和介绍，并对有待开展的研究提出了建议，为国内在环境内分泌干扰物方面的研究提供参考。     

A trait specific model of competition in a spatially structured plant community

The non-random dispersal of plant propagules is thought to counter competitive exclusion and thus promote the survival of competitively inferior species. We investigated this process by modelling the outcome of interactions between species with competitive ability defined as a function of both life-history traits and the environment with both random and clustered dispersal strategies and in environmentally homogeneous and heterogeneous environments. Four main results emerged: (1) environmental heterogeneity was seen to promote co-existence in conjunction with associated trait variation for tolerance to the environmental variable and where this trait variation was effectively limited by ‘trade-off’ such that no single species had an overall competitive advantage, (2) consistent with theory, random dispersal appeared to enhance the likelihood of competitive exclusion, whereas clustering favoured co-existence, (3) the ecological outcome of interactions between dispersal and competitive relationships varied as a function of the trait determining the competitive advantage within a particular environment, and (4) promotion of co-existence by clustered dispersal was most marked when associated with environmental heterogeneity. It is argued that these results suggest that current ecological models of species interactions may need to be modified to incorporate a more realistic understanding of competitive ability if we are to better understand the factors effecting species co-existence.     

Use of environmental isotopes and hydrochemistry as indicators for the origin of groundwater resources in El Dabaa area,northwestern coastal zone of Egypt

The EI-Dabaa area is located on the northwestern coastal zone of Egypt and is considered to be one of the most important regions for land reclamation and agriculture. In addition, it has been selected as a potential site for constructing Egypt's first nuclear power plant.In April 1989, 14 groundwater samples were collected from the area as well as collecting samples from the Mediterranean sea and from local rainwater. These samples were subjected to chemical and environmental isotope analyses. The results of the analyses for stable isotopes (oxygen-18 and deuterium) indicate that the main recharge source of the groundwater in El-Dabaa is the local precipitation during the rainy season. Variation of the environmental tritium content as well as in the chemical composition of both major cations (Na,K,Ca,Mg) and major anions (Cl,SO₄,HCO₃) between different groundwaters in the studied area reflect the high degree of inhomogeneity of the aquifer and different recharging conditions due to permeability of the water bearing formation.The chemical water type of the El-Dabaa groundwater is sodium sulphate (Na₂SO₄) and the SAR values illustrate the suitability of these groundwaters for agricultural purposes.