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Ecoregion delineations have gained increased attention in Europe, especially following the Water Framework Directive 2000/60/EC (WFD), which provides the European Union’s first policy-relevant ecoregion map. However, the WFD’s ecoregions were created through a minor adaptation of Illies’ (Limnofauna Europaea. Gustav Fisher Verlag, Stuttgart, 1967/1978) freshwater zoogeographic regions, and the map’s specific boundaries have not been widely evaluated with respect to the WFD’s uses or their biogeographic accuracy. We examined the WFD ecoregion boundaries in Greece and its neighboring Balkan states by comparing them with the most prominent freshwater biogeographic boundaries as shown by riverine freshwater fish assemblages. Classification and ordination analyses of 23 river basin fish assemblages helped delineate natural faunal break boundaries in freshwater species assemblage distributions depicting major biogeographic barriers to aquatic biota dispersal. However, these biogeographic boundaries differ from those delineated in the WFD map, suggesting boundary errors and inconsistencies in the delineation method of the WFD ecoregions. We reviewed specific boundary disagreements and produced a map showing the region’s most prominent freshwater biogeographic boundaries by charting them on watershed borders among the four biotically dissimilar river basin groups in the southern Balkans. This regional evaluation reveals both a need to reconcile disparate approaches to ecoregion mapping and to promote the development of a new policy-relevant inland waters ecoregion framework that would support broad-scale water management and aquatic conservation.  相似文献   

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Control of wild animals may give rise to controversy, as is seen in the case of badger control to manage TB in cattle in the UK. However, it is striking that concerns about the potential suffering of the affected animals themselves are often given little attention or completely ignored in policies aimed at dealing with wild animals. McCulloch and Reiss argue that this could be remedied by means of a “mandatory application of formal and systematic Animal Welfare Impact Assessment (AWIA)”. Optimistically, they consider that an AWIA could help to resolve controversies involving wild animals. The aim of this paper is to evaluate the potential of AWIA. We begin by showing how ideas akin to AWIA already play a significant role in other animal ethics controversies, particularly those concerning laboratory animal use and livestock production; and we bring in lessons learnt from these controversies. Then we comment on the suggested development and application of AWIA in the case of badger control. Finally, we discuss the prospects of applying AWIA to other sorts of wild animal controversy. We argue that the AIWA, as developed by McCulloch and Reiss, relies on several dubious premises, including that killing is a welfare issue. Furthermore, we argue that AWIA is unlikely to prevent serious moral disagreements over how to weigh concerns about wild animals against priorities in human health, the health of domestic and farm animals, and biodiversity, but that it may nonetheless serve to limit harms imposed on the wild animals.  相似文献   

5.
This paper examines ex-post 51 investment decisions made in regard to copper mines coming on stream from 1957 through 1999. It discusses two critical variables: investment timing and mine capacity choice. Using a 15% discount rate, results suggest that fewer than half of decisions were made at the right time – i.e., low price periods – confirming countercyclical investment as the optimal policy. In terms of capacity choice, the distortion is even higher, as 36 projects should have entered at least 40% larger or smaller. Realized investment decisions for timing and capacity choice would have caused a 49.1% loss over the NPV potentially achievable under optimal resolutions. Although the difference could be specifically attributed to copper price uncertainty, this paper discusses how investment evaluation methodologies could be contributing to firms not being fully rational (in the neoclassical sense) when investing.  相似文献   

6.
Tobacco and its associated products are known to be harmful for health. Moreover, the waste emanating out of the production, processing, packaging, and consumption of these products is equally harmful for humans as well as other biotic/abiotic agencies. Taking into account the toxic nature of these waste products, it is necessary to have a well-defined approach to deal with this waste. Consideration of tobacco products’ waste as municipal solid waste has serious implications in the long-term as it results in dumping of these wastes mixed-up with domestic waste in landfills. With time, toxic components become part of the leachate which contaminates water and soil, further leading to the contamination in food chain. Therefore, many countries are now considering this waste under the hazardous category and evolving various measures to safely dispose it off. In the light of recent researches and policies, it is time to re-consider this important public health issue.  相似文献   

7.
Over the last years, Norway has revised its animal welfare legislation. As of January 1, 2010, the Animal Protection Act of 1974 was replaced by a new Animal Welfare Act. This paper describes the developments in the normative structures from the old to the new act, as well as the main traits of the corresponding implementation and governance system. In the Animal Protection Act, the basic animal ethics principles were to avoid suffering, treat animals well, and consider their natural needs and instincts. In addition, a principle for balancing our duties towards animals with the needs and interests of humans was expressed by the formulation “unnecessary suffering.” These principles (only with slightly different formulations) are retained in the new act. The novelty of the new act is shown by its explicit intention to promote respect for animals and its recognition of animals’ intrinsic value. Whereas intrinsic value is only given a symbolic function, the notion of respect is intended to have practical consequences. One interpretation of respect for animals is taking the animal’s integrity—and not only welfare—into account. Another is to see the introduction of respect as a call to animal keepers to provide animals with welfare exceeding the minimum requirements. In several respects, the legal system now seems to leave more responsibility to the individual animal keeper—and to citizens in general. I argue that if the authorities really do want to promote respect for animals, they must at the same time initiate activities to achieve this. In my perspective the challenge is to provide adequate measures to achieve in practice the intended respect for animals expressed in the new act.  相似文献   

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ABSTRACT

Cities are both significant emitters of carbon dioxide and centres of innovations that may contribute to de-carbonizing our societies. More voices claim therefore that local authorities should be included in efforts to mitigate climate change. However, few studies have analysed how local authorities manage carbon and climate in urban areas in middle- and low-income countries. Yet, the institutional settings and governance structures of such cities are different from those prevailing in cities of wealthy countries. This paper aims to fill this gap by exploring: (a) whether and—if so—how local authorities in Mexico City actually ‘manage’ carbon emissions; (b) how the city's evolving governance structures function and whether they ‘fit’ with the problem they address; and (c) how institutional capacity constrains authorities' management efforts. The paper suggests that policy networks and research groups have been critical in launching a climate agenda. Nevertheless, this has not been enough to push effective policies. Policymaking has been constrained by two sets of institutional factors: the problem of fit and a lack of institutional capacity.  相似文献   

9.
Testing for the existence of downward trends in real commodity prices has been the focus of several studies since the Prebisch–Singer hypothesis was formulated back in 1950. In this article, we focus on annual and monthly series of various commodity categories and consider alternative price deflators. Based on the methodology of Harvey et al. (2010), which is robust to the order of integration of the time series, we conclude that the time frequency and the price deflators play a key role when testing for the Prebisch–Singer hypothesis. For instance, at an annual frequency (1900–2003, 1900–2008), it becomes considerably more likely to support it when deflating by the unadjusted US CPI-all items than when deflating by the Manufactures Unit Value (MUV) Index or the Historical Price Index of Manufactures (HPIM). This finding is in agreement with the Svedberg and Tilton (2006) discussion on the CPI's overestimation of inflation and the measurement of the real price of copper. When dealing with monthly data (January 1957–December 2010), our results show that real prices tend not to reject the null hypothesis of a trendless series, except when deflating by the PPI-Crude Materials and, to a lesser extent, by the HPIM.  相似文献   

10.
Journal of Agricultural and Environmental Ethics - Innovation in fisheries is a global development that focuses on a broad range of aims. One example is a project that aims to develop technology...  相似文献   

11.
Wildfires are a common feature of peatland environments, but the carbon balance of these wildfires is often not considered and the production of refractory black carbon in these wildfires could be an important addition to carbon accumulation and mitigate losses of biomass during the fire. This study investigates the biomass and carbon losses during a moorland wildfire. Changes in above-ground carbon stocks were calculated using a combination of field data, laboratory measurements and literature values. The results show that approximately 14% of the carbon in the original above-ground biomass remained on the site after the burn. Black carbon production was approximately 6 gC m(-2) which constituted 4.3% of the biomass lost. The survival of biomass and black carbon may help to mitigate the loss of carbon during the fire.  相似文献   

12.
Abstract

Although intrinsically a global environmental concern, the climate change issue has a number of implications for local authorities. Within the European Union (EU), the remit of local authorities in—‐for abatement policies—the crucial areas of energy and transport policy varies considerably, as does their commitment to environmental action more generally. This paper examines the role of local authorities in climate protection within a framework of global, EU and national action, through examples of local strategies from Germany, Italy, Spain, Sweden and the UK. The paper finds positive instances of action in all countries, but points to unsympathetic policy frameworks both at national and EU level, such as budget constraints imposed on local authorities, the pursuit of low energy prices combined with a resistance to impose carbon taxes, a lack of energy efficiency standards and insufficient support for public transport.  相似文献   

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Place attachment: How far have we come in the last 40 years?   总被引:3,自引:0,他引:3  
This paper reviews research in place attachment and organizes the material into three sections: research, method, and theory. A review of several hundred empirical and theoretical papers and chapters reveals that despite mobility and globalization processes, place continues to be an object of strong attachments. The main message of the paper is that of the three components of the tripartite model of place attachment (Scannell & Gifford, 2010a), the Person component has attracted disproportionately more attention than the Place and Process components, and that this emphasis on individual differences probably has inhibited the development of a theory of place attachment. Suggestions are offered for theoretical sources that might help to fill the gaps, including theories of social capital, environmental aesthetics, phenomenological laws of order, attachment, and meaning-making processes that stem from movements and time-space routines.  相似文献   

15.
Harmful but culturally cherished practices often endure in spite of the damages they cause. Meat consumption is increasingly becoming one of such cases and may provide an opportunity from which to observe these phenomena. Growing evidence indicates that current and projected production and consumption patterns are important contributors to significant environmental problems, public health degradation, and animal suffering. Our aim is to contribute to a further understanding of the psychological factors that may hinder or promote personal disposition to change food habits to benefit each of these domains. Drawing from previous evidence, this study explores the proposition that some consumers are motivated to resort to moral disengagement strategies when called upon to consider the impacts of their food habits. Data were collected from six semi-structured focus groups with a sample of 40 participants. Although affirming personal duties towards preserving the environment, promoting public health, and safeguarding animal welfare, participants did not show personal disposition to change their meat consumption habits. Several patterns of response that resonate with the principles of moral disengagement theory (i.e. reconstrual of the harmful conduct; obscuring personal responsibility; disregard for the negative consequences; active avoidance and dissociation) were observed while discussing impacts and the possibility of change. Results seem to support the proposition that the process of moral disengagement may play a role in hindering openness to change food habits for the benefit of the environment, public health, and animals, and point towards the relevance of further exploring this approach.  相似文献   

16.
Many species of conservation concern are spatially structured and require dispersal to be persistent. For such species, altering the distribution of suitable habitats on the landscape can affect population dynamics in ways that are difficult to predict from simple models. We argue that for such species, individual-based and spatially explicit population models (SEPMs) should be used to determine appropriate levels of off-site restoration to compensate for on-site loss of ecologic resources. Such approaches are necessary when interactions between biologic processes occur at different spatial scales (i.e., local [recruitment] and landscape [migration]). The sites of restoration and habitat loss may be linked to each other, but, more importantly, they may be linked to other resources in the landscape by regional biologic processes, primarily migration. The common management approach for determining appropriate levels of off-site restoration is to derive mitigation ratios based on best professional judgment or pre-existing data. Mitigation ratios assume that the ecologic benefits at the site of restoration are independent of the ecologic costs at the site of habitat loss. Using an SEPM for endangered red-cockaded woodpeckers, we show that the spatial configuration of habitat restoration can simultaneously influence both the rate of recruitment within breeding groups and the rate of migration among groups, implying that simple mitigation ratios may be inadequate.  相似文献   

17.
Amending poultry litter with Al sulfate (alum) has proven effective in reducing water-soluble P in the litter and in runoff from fields that have received litter applications. Although its effectiveness has been demonstrated on a macroscopic scale in the field or in the poultry houses, little is known about P speciation in either alum-amended or unamended litter. This knowledge is important for the evaluation of long-term stability and bioavailability of P, which is a necessary prerequisite for the assessment of the sustainability of intensive poultry operations. Here we report results from an investigation of alum-amended poultry litter (PL) that combined a chemical extraction sequence with solid-state 31P nuclear magnetic resonance (NMR) spectroscopic analysis of the residues. Aluminum is predominantly found in the fine size separate (<125 microm), indicating that the alum added to the poultry houses hydrolyzed without being completely dispersed in the litter. The NMR spectra confirmed the hypothesis that calcium phosphate phases are only dissolved during extraction with dilute acid and phosphate associated with Al is mainly dissolved during extraction with NaOH. Extraction of phosphate associated with Al was incomplete, however, as evidenced by 31P NMR spectroscopy. It could also be demonstrated that the extraction sequence overestimates the calcium phosphate fraction by an order of magnitude in this particular sample. Results from sequential chemical extraction should therefore be used with caution when assessing the magnitude of different phosphate pools in poultry litter.  相似文献   

18.
The fate of used electronic products (e-waste) is of increasing concern because of their toxicity and the growing volume of e-waste. Addressing these concerns requires developing the recycling infrastructure, but good estimates of the volume of e-waste stored by US households are still unavailable. In this context, we make two contributions based on a national random survey of 2136 US households. First, we explain how much e-waste is stored by US households using count models. Significant explanatory variables include age, marital and employment status, ethnicity, household size, previous e-waste recycling behavior, and to some extent education, home ownership, and understanding the consequences of recycling, but neither income nor knowledge of e-waste recycling laws. Second, we estimate that on average, each US household has 4.1 small (≤10 pounds) and 2.4 large e-waste items in storage. Although these numbers are likely lower bounds, they are higher than recent US Environmental Protection Agency (EPA) estimates (based on narrower product categories). This suggests that the backlog of e-waste in the US is likely larger than generally believed; it calls for developing the recycling infrastructure but also for targeted recycling campaigns.  相似文献   

19.
Land management agencies commonly use rapid assessments to evaluate the impairment of gravel‐bed streams by sediment inputs from anthropogenic sources. We question whether rapid assessment can be used to reliably judge sediment impairment at a site or in a region. Beyond the challenges of repeatable and accurate sampling, we argue that a single metric or protocol is unlikely to reveal causative relations because channel condition can result from multiple pathways, processes, and background controls. To address these concerns, a contextual analysis is needed to link affected resources, causal factors, and site history to reliably identify human influences. Contextual analysis is equivalent in principle to cumulative effects and watershed analyses and has a rich history, but has gradually been replaced by rapid assessment methods. Although the approaches differ, rapid assessment and contextual analysis are complementary and can be implemented in a two‐tiered approach in which rapid assessment provides a coarse (first‐tier) analysis to identify sites that deserve deeper contextual assessment (second‐tier). Contextual analysis is particularly appropriate for site‐specific studies that should be tailored to local conditions. A balance between rapid assessment and contextual analysis is needed to provide the most effective information for management decisions.  相似文献   

20.
The concept of resilience is now frequently invoked by natural resource agencies in the US. This reflects growing trends within ecology, conservation biology, and other disciplines acknowledging that social–ecological systems require management approaches recognizing their complexity. In this paper, we examine the concept of resilience and the manner in which some legal and regulatory frameworks governing federal natural resource agencies have difficulty accommodating it. We then use the U.S. Forest Service’s employment of resilience as an illustration of the challenges ahead.  相似文献   

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