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Infrastructure and Conservation Policy in Brazil   总被引:1,自引:0,他引:1  
Abstract:  The development of transportation and energy infrastructure has been a major driver in the conversion of natural ecosystems in Brazil since the nineteenth century. Although this pattern is present in most countries, Brazil differs in the scale of opportunities that are still available to build its physical infrastructure while pursuing an ambitious conservation agenda. This advantage stems from the magnitude of intact ecosystems, a dynamic policy environment, and the increasing availability of biological and economic data needed to harmonize conservation with public works. Success depends on integrating conservation and infrastructure planning, rather than relying on the project based, largely ineffective environmental assessment process. Front-loading environmental mitigation and compensation will also help, as will improving public access to, and understanding of, information on the environmental and economic values at stake in major infrastructure decisions.  相似文献   
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Anthropogenic climate change is a key threat to global biodiversity. To inform strategic actions aimed at conserving biodiversity as climate changes, conservation planners need early warning of the risks faced by different species. The IUCN Red List criteria for threatened species are widely acknowledged as useful risk assessment tools for informing conservation under constraints imposed by limited data. However, doubts have been expressed about the ability of the criteria to detect risks imposed by potentially slow‐acting threats such as climate change, particularly because criteria addressing rates of population decline are assessed over time scales as short as 10 years. We used spatially explicit stochastic population models and dynamic species distribution models projected to future climates to determine how long before extinction a species would become eligible for listing as threatened based on the IUCN Red List criteria. We focused on a short‐lived frog species (Assa darlingtoni) chosen specifically to represent potential weaknesses in the criteria to allow detailed consideration of the analytical issues and to develop an approach for wider application. The criteria were more sensitive to climate change than previously anticipated; lead times between initial listing in a threatened category and predicted extinction varied from 40 to 80 years, depending on data availability. We attributed this sensitivity primarily to the ensemble properties of the criteria that assess contrasting symptoms of extinction risk. Nevertheless, we recommend the robustness of the criteria warrants further investigation across species with contrasting life histories and patterns of decline. The adequacy of these lead times for early warning depends on practicalities of environmental policy and management, bureaucratic or political inertia, and the anticipated species response times to management actions. Detección del Riesgo de Extinción a partir del Cambio Climático por medio del Criterio de la Lista Roja de la UICNKeith et al.  相似文献   
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Preventing groundwater contamination is vastly cheaper than remediation. Recognizing this, attention in water and land management agencies in North America increasingly turn to groundwater protection. Local agencies, such as municipalities and watershed management districts, are vital to successful groundwater protection, but they face daunting challenges. In the United States, senior governments have recognized these challenges and provide considerable support for local agencies. In Ontario, Canada, local agencies are, to a much greater extent, on their own. The aims in this paper are to analyze factors that shape local capacity for groundwater protection, focusing on Ontario, and to recommend avenues for capacity building. Interrelationships among five dimensions of capacity (technical, financial, institutional, social, and political) are explored through an analysis of three smaller Ontario communities: City of Guelph (population 93,400), Town of Orangeville (population 22,188), and Town of Erin (population 11,000). Size clearly influences capacity for groundwater protection. However, other considerations unrelated to size appear to be as important. These other factors include the ability to form horizontal and vertical linkages with external agencies, political leadership and commitment, and citizen involvement. Thus, smaller communities in Ontario (and other jurisdictions with limited senior government support) would do well to focus on these areas at the same time as they develop their technical, financial, and institutional capacity.  相似文献   
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Analysts examining disputes between transnational corporations and national governments over apportionment of benefits and rights of control in exploiting natural resources tend to confine themselves to structural characteristics of such conflicts. Such approaches assume that conflict resolution is final and traditionally place a major emphasis on control issues. This research explores the dominant issues in conflict in resource industries through use of a behavioural model. It looks at the strategies that both a major bauxite producing nation and the aluminium transnational corporations used to resolve the conflicts which arose as a result of the unilateral imposition of a bauxite levy by Jamaica. This article argues that the values, expectations and preferences of parties to a conflict situation are crucial to understanding its resolution. It further suggests that resource control is not necessarily a desirable goal for the host country but that it should acknowledge competing considerations of revenue maximization, revenue stability and lessening dependence on a natural resource base need to be considered. It shows further that settlement of such situations is always open to disturbance. Les analystes qui étudient les désaccords entre les sociétés transnationales et les gouvernements au sujet de la répartition des bénéfices et du droit de contrôle de l'exploitation des ressources naturelles ont tendance à ne considérer que les caractéristiques structurales de tels conflits. Cette attitude suppose que le conflit est résolu une fois pour toute et traditionnellement met l'accent principal sur les questions de contrôle. Cette étude examine les questions principales qui sont en conflit dans ces industries au moyen d'un modèle de relation. El le examine les stratégies utilisées à la fois par une des principales nations productrices de bauxite et par une compagnie transnationale productrice d'aluminium pour résoudre les conflits qui se sont élevés en conséquence de la fixation unilatérale d'une taxe sur la bauxite par la Jamaïque. Cet article prétend que les valeurs, espérances et préférences des parties en conflit doivent être parfaitement comprises pour pouvoir résoudre celui-ci. De plus, l'article suggère que le contrôle des ressources n'est pas nécessairement un but souhaitable pour le pays hôte mais que celui-ci devrait reconnaître qu'il faut tenir compte des considérations de maximisation des revenus, de la stabilité des revenus et d'une moindre dépendance vis-à-vis de la ressource naturelle. Cet article montre de plus que le règlement de telles situations est toujours sujet à des troubles. Los analistas que examinan las disputas entre empresas multinacionales y los gobiernos sobre la distribución de beneficios y derechos de control en la explotación de recursos naturales, tienden a limitarse a las características estructurales de dichos conflictos. Tal enfoque asume que la solución del conflicto es definitiva y ponen normalmente el mayor énfasis al aspecto de control. Esta investigación explora los elementos dominantes en conflicto en la explotación de recursos a través de modelos de comportamiento. Examina las estrategias que se usaron por los países productores mayores de bauxita y las transnacionales de la industria del aluminio para resolver los conflictos que resultaron como consecuencia de la imposición unilateral tributaria sobre la bauxita por Jamaica. Este artículo sostiene que los valores, expectativas y preferencias de las partes en conflicto son importantes para entender las soluciones. Se sugiere además que el aspecto de control del recurso no es necesariamente un objetivo deseable para el país dueño del recurso sino que éste debe considerar objetivos alternativos tales como maximización del ingreso, estabilidad de ingreso y disminución de la dependencia del país de los recursos naturales. El artículo muestra además que las soluciones de tales situaciones están siempre expuestos a alteraciones.  相似文献   
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