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101.
Gustavo Hallwass Renato A.M. Silvano 《Journal of Environmental Planning and Management》2016,59(9):1537-1559
Tropical fisheries, which are considered multi-species, may show selectiveness. We analyzed the degree of selectivity of fish catches in 46 sites along the Amazon basin through the percentage of biomass corresponding to the most caught fish species. Amazonian fisheries were considered moderately selective, as 54% of the sites directed more than a quarter of fishing effort to one fish species and in 87% of the sites more than half the fishing effort was directed to five fish species. Commercial fisheries were more selective than subsistence fisheries. Eleven fish species (nine of them migratory) have received more fishing pressure in the studied Amazonian regions and the catch composition differed among regions. We thus recommend that fisheries management in the Amazon basin should distribute fishing effort among more fish species; incorporate the particularities of commercial and subsistence fisheries; evaluate fishing effects on ecosystem services; and consider the biological characteristics of preferred fish. 相似文献
102.
Successful biodiversity conservation does not depend on ecologic knowledge alone. Good conservation policies and policy implementation
tools are equally important. Moreover, the knowledge, skills, and attitudes of local actors, directly in charge of operations
in the field, are a key to successful policy implementation. The connections between policy objectives and their implementation
as well as the involvement of local actors’ efforts in implementing policy objectives largely depend on the governance model
in use. This article assesses the knowledge of local actors in relation to the biodiversity conservation objectives and tools
in Lithuanian forest management. As a main framework for this study, the needs assessment approach was applied. The study
used both in-depth open-ended interviews and follow-up telephone interviews. Two state forest enterprises in Lithuania were
selected as the study sites. The findings indicate that policy objectives in the field of forest biodiversity conservation
and the related tools are well known but not well understood by those in charge of forest biodiversity policy implementation.
To improve the situation, a transition toward adaptive learning and participatory governance as a means of facilitating conservation
efforts is proposed. 相似文献
103.
Johann Baumgärtner Josef Hartmann 《Journal of Agricultural and Environmental Ethics》2001,14(1):67-83
The paper describes the design and implementation of a plant biodiversity conservation program that was developed under funding and time constraints for diverse ecological, social, and institutional environments. The biodiversity program for alpine meadows and pastures located in the Swiss Canton of the Grisons is used as an example. The design of the sustainable program relied on existing legislation, accounted for limited ecological knowledge and expertise, and considered biodiversity as a common-pool resource. The trend to intensified cultivation of restricted areas required fast action, while the sustainability of the program design had to take into account institutional diversity. Fifteen habitats and plant communities worth conserving were known, and 57 plant species were identified as indicator species for establishing an inventory and for monitoring purposes. A small subset of 16 well known plant species was presented to the farming communities. They were invited to notify the areas in which they observed the presence of these plants. In different regions of the Canton a total number of 39 paraecologists were trained to inspect the areas notified by farmers and to recommend possible incorporation into the Cantonal inventory. This was done once the farmers signed a contract in which they agreed to follow adequate management practices. The farmers received subsidies to compensate for their losses. Communal authorities controlled the fertilizer input and cutting dates, while the paraecologists were trained to monitor plant biodiversity. The program started in 1992 and the initial phase of the inventory was terminated in 1996. At the beginning of 1996, an inventory of 2617.19 ha, most of which are meadows, was taken and managed according to the rules specified in the contract. The program was considered successful because (i) of the size of the area in the inventory, (ii) about 30%of the farmers participated, and (iii) farmers started cultivating previously abandoned farmland. 相似文献
104.
This study presents the contributions of materials, earth engineering machines and construction techniques to potential environmental impacts from the main items of typical road earthworks. To achieve this goal, the overall activity at a 1.9-km long French earthworks project site for a heavily trafficked highway was surveyed during its 2007–2009 construction period. Using data collected and a numerical model of road life cycle assessment (LCA), i.e. ECORCE, six indicators could be evaluated, namely: energy consumption, global warming potential, acidification, eutrophication, photochemical ozone creation, and human chronic toxicity. When available, several life cycle inventories were implemented in order to appraise indicator sensitivity with respect to the considered panel of pollutants. Results also allowed estimating from an LCA point of view: (i) the conservation of both aggregates and soil as induced by quicklime treatment and (ii) the duration necessary for projected traffic levels to offset the potential environmental impacts of the earthworks stage. 相似文献
105.
Mieno, Taro and John B. Braden, 2011. Residential Demand for Water in the Chicago Metropolitan Area. Journal of the American Water Resources Association (JAWRA) 47(4):713‐723. DOI: 10.1111/j.1752‐1688.2011.00536.x Abstract: This paper provides the first contemporary analysis of residential water demand in humid Northeastern Illinois, in the vicinity of Chicago, and explores seasonal and income‐based differentials in the responsiveness of water use to water prices. Using a panel of system‐level data for eight water systems and controlling for seasons, weather, incomes, and community characteristics, the analysis yields low estimates of price elasticity of demand for water in line with other studies. Furthermore, price response is greater in summer and less in higher income communities. We suggest that use of seasonal pricing can help mitigate equity issues arising from differential income elasticities while taking advantage of the greater price responsiveness of summertime water use. 相似文献
106.
Simona Cosma Rossella Leopizzi Simone Pizzi Mario Turco 《Corporate Social Responsibility and Environmental Management》2021,28(3):1091-1103
Previous studies show regulation and corporate governance play an important role in affecting CSR processes and outcomes. The stakeholder engagement (SE) process represents a good practice of Corporate Social Responsibility (CSR) and, at the same time, an aspect of substance over form, within the CSR policies. In spite of its relevance, SE represents a little explored field of research. The purpose of this paper is to investigate if the improvements in SE processes are actually driven by regulation rather than by some elements of corporate governance. The study examines the effect of the regulation and some board's characteristics on SE. Specifically, in 2017 the introduction of EU non-financial information Directive (Directive 2014/95/EU) shifts the disclosure of non-financial information from the voluntary to the mandatory realm: in this mandatory context, the quality of the SE process that is indirectly disclosed in non-financial information, could improve. By using a content and statistical analysis, through performing 4 two-way Analysis of Variance, the study reveals that the effects of the introduction of the Directive 2014/95/EU on the stakeholder engagement process have been limited and the improvements in SE before and after the introduction of the Directive link to the Board of Directors characteristics. These findings are interesting for academics, by enriching the academic debate on mandatory versus voluntary disclosure and the relationship between board attributes and sustainability, for policy makers, by providing suggestions to favour organisational change of the firms, and for managers, by identifying the desirable characteristics of the Board of Directors. 相似文献
107.
Amanda A. Hyman Orou G. Gaoue Charles Tamou Paul R. Armsworth 《Conservation Letters》2021,14(2):e12770
Natural resource management involves balancing benefits and costs that accrue through time. How individuals and local communities weight such tradeoffs can profoundly influence how they use and conserve resources. Our goal was to understand time preferences of future benefits for goods that are relevant for developing effective conservation strategies. We surveyed >500 Fulani in Benin about their time preferences regarding financial, ecological, and agricultural goods, summarizing these in the form of discount rates. In a discrete-time, constant annual form, our results were much higher (median: 150%) than values often discussed in literature. These discount rates declined through time; people valued the future more than would be assumed based on constant discounting. Discount rates were higher for financial goods than ecological or agricultural goods. We illustrate how our estimates of discount rates change recommendations for optimal management of forest resource harvesting in the tropics. While members of this grazing community discount future benefits at a high rate, they do so in ways that contrast with conventional economic theory and favor long-term use of nontimber forest products. 相似文献
108.
Domestic water conservation in arid climates can result in efficient utilization of existing water supplies. The impacts of
conservation measures such as the installation of water-saving devices, water metering and pricing schemes, water rationing
and public awareness programs, strict plumbing codes, penalties for wasting water, programs designed to reduce leakage from
public water lines and within the home, water-efficient landscaping, economic and ethical incentives are addressed in detail.
Cost savings in arid climates, with particular reference to Saudi Arabia, in relation to some conservation techniques, are
presented. Water conservation technology and tentative demonstration and implementation of water conservation programs are
discussed. 相似文献
109.
William E. Sharpe 《Journal of the American Water Resources Association》1978,14(5):1080-1087
ABSTRACT: The municipal water conservation options available to meet the goals of a national water conservation policy are evaluated. Water conservation with water conservation devices is shown to offer many significant advantages over education and pricing and metering as a method of accomplishing water conservation goals. Current constraints on the use of water conservation devices are outlined, and their elimination is suggested if the nation's water conservation goals are to be met. 相似文献
110.
Sorace A 《Environmental management》2001,28(4):547-560
Urban-agricultural parks could have some advantages to wildlife because of less intensive agricultural procedures, absence
of hunting pressure, and reduced human disturbance. In this study, the breeding and wintering bird communities and the small
mammal community in an urban-agricultural park of Rome were compared to those of a close urban park and a close agricultural
area just outside the city. The aim was to assess the best destination and management of wildlife in natural areas at the
urban–rural interface. Richness and diversity of bird communities were higher in the urban-agricultural park. Due to habitat
features and probably human disturbances, but not to urbanization, predation, and competition factors, the urban park drastically
reduces the abundance of decreasing open-land bird species. Abundance of these species was not significantly different in
the urban-agricultural park and in the agricultural area. In the urban-agricultural and urban park, bird and mammal pest species
were more abundant than they were in the agricultural area. Regarding decreasing abundance of small mammal species, no significant
difference among the study areas was observed. Urban-agricultural park is a better choice than urban park for wildlife. Thus,
a higher number of preserved urban natural areas should be devoted to urban-agricultural parks. However, to increase the abundance
of open-land species and in general wildlife, a less intensive management of cultivated and pasture patches is necessary. 相似文献