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232.
环境污染对生态危害经济损失评估模式的研究 总被引:5,自引:0,他引:5
定量评估环境污染对生态环境危害的经济损失,是环境科学研究的课题。本文从风险评价和环境经济学角度,提出环境污染对生态环境危害经济损失的评估模式。 相似文献
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Mining generates risk of environmental and social harm for Indigenous peoples but can also generate substantial revenues for them, creating opportunities for community development in a context where economic and social disadvantage is the norm. Especially as mining revenues should, in part, compensate for mining’s negative social and environmental impacts, it is vital that mineral taxation on Indigenous lands reflect a careful assessment of appropriate tax mechanisms and a matching of these with community priorities. Yet little has been written that could serve as a guide for Indigenous decision makers. This article contributes to an understanding of the issues and choices facing Indigenous communities in designing mineral taxation regimes, by focusing on the question of economic risk. Risk arises as a key variable in choosing or designing a mineral taxation regime in three ways. Different approaches to mineral taxation are inherently more or less risky, in the sense that they are more or less certain to generate tax revenues. A second aspect of risk involves the degree of economic certainty or predictability associated with different types of commodities and projects. Third, the risk tolerance of Indigenous peoples and communities can vary significantly. We show how Indigenous groups can integrate and address these different dimensions of risk, by recognising the ‘risk consequences’ associated with different approaches to mineral taxation and choosing an approach that reflects, as fully as possible, the group’s risk tolerance. 相似文献
235.
以辽宁沿海经济带为研究对象,利用1997—2008年辽宁沿海各城市的城市化和气候指标,运用线性拟合、主成分分析方法探索城市化对气候的影响。结果表明,除盘锦和大连的气温在城市化影响下呈现微弱的下降趋势外,其他各地的年均温和年降水量均随着城市化进程的发展呈现波动性上升趋势。城市规模、产业结构合理水平、下垫面变化和城市环境共同构成葫芦岛、锦州、营口和大连城市气候变化的主要因素,而在盘锦和丹东,城市规模和城市环境是第一主成分,产业结构合理水平和下垫面变化是第二主成分。在未来的发展过程中,辽宁沿海经济带应控制人口数量,合理调整产业结构,减少污染物排放,增加绿地面积,从而协调城市化发展与气候之间的关系。 相似文献
236.
Mats Lindegarth Ulf Bergström Johanna Mattila Sergej Olenin Markku Ollikainen Anna-Leena Downie Göran Sundblad Martynas Bučas Martin Gullström Martin Snickars Mikael von Numers J. Robin Svensson Anna-Kaisa Kosenius 《Ambio》2014,43(1):82-93
We evaluated performance of species distribution models for predictive mapping, and how models can be used to integrate human pressures into ecological and economic assessments. A selection of 77 biological variables (species, groups of species, and measures of biodiversity) across the Baltic Sea were modeled. Differences among methods, areas, predictor, and response variables were evaluated. Several methods successfully predicted abundance and occurrence of vegetation, invertebrates, fish, and functional aspects of biodiversity. Depth and substrate were among the most important predictors. Models incorporating water clarity were used to predict increasing cover of the brown alga bladderwrack Fucus vesiculosus and increasing reproduction area of perch Perca fluviatilis, but decreasing reproduction areas for pikeperch Sander lucioperca following successful implementation of the Baltic Sea Action Plan. Despite variability in estimated non-market benefits among countries, such changes were highly valued by citizens in the three Baltic countries investigated. We conclude that predictive models are powerful and useful tools for science-based management of the Baltic Sea. 相似文献
237.
Chongfeng Wang 《中国人口.资源与环境(英文版)》2014,(2)
The conflict between city development and urban carrying capacity is getting ever prominent.In order to study and predict the restriction factors and prominent problems in the development of the Shandong Peninsula Blue Economic Zone as well as promote the transfer of economic development pattern in this region,this study starts from four single factor carrying capacity indicators of water,earth,transportation and environment in the city and its comprehensive carrying capacity indicator,evaluates and analyzes its carrying capacity and then papooses policy suggestions for improving its carrying capacity. 相似文献
238.
Sebastián Villasante David Rodríguez-González Manel Antelo Susana Rivero-Rodríguez Joseba Lebrancón-Nieto 《Ambio》2013,42(8):937-950
Through a comparative analysis of prices in capture fisheries and aquaculture sectors, the objectives of this paper are a) to investigate three the trends in prices of forage catches to feed the aquaculture species, b) to analyze the amount of fish species need to feed aquaculture species in order to assess the level of efficiency in resource use, and c) to examine the degree of economic concentration either in wild-catch industry and aquaculture sectors. The results show that prices of cultivated species are higher than prices of the same species when harvested from the sea. We explain this fact by the interplay of three forces. First, the amount of wild fish to feed aquaculture species continues to improve over time. Second, the pressure of fishing activities has not been reduced since catches of most forage fishes are declining, which induce higher prices of capture species that feed aquaculture production. Third, the level of seafood market concentration is significantly higher in aquaculture than in wild catches, which generates higher prices in aquaculture. 相似文献
239.
Claire Beausoleil Jean-Nicolas Ormsby Andreas Gies Ulla Hass Jerrold J. Heindel Marie Louise Holmer Pia Juul Nielsen Sharon Munn Gilbert Schoenfelder 《Chemosphere》2013
A workshop was held in Berlin September 12–14th 2012 to assess the state of the science of the data supporting low dose effects and non-monotonic dose responses (“low dose hypothesis”) for chemicals with endocrine activity (endocrine disrupting chemicals or EDCs). This workshop consisted of lectures to present the current state of the science of EDC action and also the risk assessment process. These lectures were followed by breakout sessions to integrate scientists from various backgrounds to discuss in an open and unbiased manner the data supporting the “low dose hypothesis”. While no consensus was reached the robust discussions were helpful to inform both basic scientists and risk assessors on all the issues. There were a number of important ideas developed to help continue the discussion and improve communication over the next few years. 相似文献
240.
Daniel F. Valenzuela-Cota Génesis V. Buitimea-Cantúa Maribel Plascencia-Jatomea Francisco J. Cinco-Moroyoqui Aarón A. Martínez-Higuera 《Journal of environmental science and health. Part. B》2013,48(8):647-654
The aim of this study was to investigate the in vitro effect of an antifungal fraction obtained from Jacquinia macrocarpa plant (JmAF) in the generation of reactive oxygen species (ROS) and the activity of the catalase (CAT) and superoxide dismutase (SOD) enzymes from Fusarium verticillioides, as well as their influence in the viability of the fungus spores. The compounds present in the JmAF were determined by gas chromatography/quadrupole time-of-flight mass spectrometry (GC/QTOF-MS). The effect of the exposition to JmAF on the generation of ROS, as well as in the CAT and SOD activities in F. verticillioides, was determined. The main compounds detected were γ-sitosterol, stephamiersine, betulinol and oleic acid. JmAF showed very high ability in inhibiting the spore viability of F. verticillioides, and their capacity to cause oxidative stress by induction of ROS production. JmAF induced the highest ROS concentration and also inhibited CAT and SOD activities. The results obtained in this study indicate that JmAF is worthy of being considered for the fight against phytopathogenic fungi. 相似文献