1,020 research outputs found
Social and Economic Consequences of Forest Decline in Czechoslovakia
The forests of Czechoslovakia are seriously endangered by air pollution. Another factor contributing to forest decline could be the historical development of silviculture. The study discusses the contemporary state of forests in Czechoslovakia and the outlook to 2000. Continued forest decline could seriously endanger the non-timber functions of forests. The importance of the water-controlling function of forests and its economic efficiency are broadly discussed. The largest part of the paper deals with the influence of forest decline on recreation. Even with limited data, one can observe a continually growing demand for recreation in mountain areas with damaged forests. The reasons lie in the historical development and peculiar features of recreation in this socialist society. The difficulties of forecasting peoples' behavior and their recreational demands is recognized. The last part of the paper deals with the influence of forest decline on production in the wood-processing and pulp-and-paper industries and strategies for their future. It will be necessary to change the structure of the forest-products sector and to investigate the newest technologies for the best utilization of all wood grown, which due to forest damage and the ensuing compulsory sanitation fellings will increase first and then after some years decrease. The study shows that forest decline in Czechoslovakia will lead to high economic losses and high consequent costs and investments in future decades, and can also have serious social consequences even if none have yet been manifested
Forest Potentials and Policy Implications: A Summary of a Study of Eastern and Western European Forest by the IIASA
National timber-assessment studies based on dynamic models are well developed in some European countries, but consistent and dynamic timber assessments for all of Europe are rare and those that exist are not based on formal quantitative models. Because of this lack, a first objective of the IIASA Forest Study was the development of a consistent and formal dynamic model for European forests. Such a model is crucial for formulating relevant forest policies throughout Europe, as well as for calculating long-term timber balance for the region.
Finding solutions to the air pollution problem is not easy. Those who design a nd implement solutions to the problem must coordinate local actions to achieve regional goals, regional actions to achieve national goals, and national actions to achieve international goals. We hope that the results of the IIASA Forest Study will play a role in this process
Testing the "Policy Exercise" in Studies of Europe's Forest Sector: Methodological Reflections on a Bittersweet Experience
This report presents the Policy-Exercise concept developed by Brewer (1986), among others. The overall objectives of this Policy-Exercise are: to foster communication and mutual understanding; to synthesize policy-relevant information; and to discover alternatives for the future. The different methodological Policy-Exercise concepts tested by the Forest Study and the lessons learned are described in this paper
Impacts of Changes in Climate and Atmospheric Chemistry on Northern Forest Ecosystems and their Boundaries: Research Directions
In response to numerous suggestions with the research community that boreal forests should be targeted for analyses of potential ecosystem response to impending major changes in climate and atmospheric composition, a task-force meeting for research-planning purposes was held at the International Institute for Applied Systems Analysis in August 1987. Participants discussed objectives for an international collaborative research program on this subject, what the current state of knowledge is, what the relevant research questions are, and what research approaches should be developed to address these questions. This report summarizes the workshop discussions, and presents synopses of working-group discussions on the following types of investigations: (a) historical responses of boreal-forest stands to changing climate and atmosphere using correlational data analyses; (b) response of boreal ecosystems to warm and enhanced-CO2 environments using physical field experiments; (c) response of boreal ecosystems to raised or lowered levels of soil moisture using physical field experiments; (d) long-term behavior of boreal-forest stands in the face of changing atmosphere and climate using measurements from permanent plots; (e) development of comprehensive databases on ecological characteristics of boreal forests and silvical characteristics of boreal-forest tree species based on literature reviews and data syntheses; (f) response and sensitivity of boreal-forest stands and landscapes to changing atmospheric and climatic conditions using simulation models; and (g) response of regional boreal forests to changing climate and atmosphere in the context of forest management using simulation models and policy exercises.
The research themes outlined above cover a wide range of spatial and temporal scales. As well, they cover a wide range of organization, from the organism through populations and communities to ecosystems (indeed, ecosystems including socio-economic subsystems). It is concluded that the various studies can benefit immensely from careful coordination that helps each study anchor its process mechanisms in lower hierarchical levels, and find its significance at higher levels. The coordination would also prevent wasteful duplication of effort in different countries where boreal forests exist, and would assist groups of researchers to benefit from (a) regular contact for exchange of data and information that would not normally be available through regular channels of dissemination, and (b) collaborative research arrangements for expensive, long-term, broad-scale projects that otherwise would probably not be possible
Biodiversity of Siberian Forests: Concepts, Preliminary Analyses, and Proposed Research Directions
Future Forest Resources of Western and Eastern Europe
This book records the results of a four-year study of the effects of air pollutants, ineffective silviculture practices and other factors such as restrictive legislation and neglect of forests in 24 European countries.
The story presented is grim: air pollutants are damaging some 80% of conifers and 45% of deciduous species and annual losses in timber will approach 48 million cubic meters in Western Europe and 35 million cubic meters in Eastern Europe. Annual losses due to air pollution (mainly sulfur and nitrogen) are estimated to be about 29 billion US dollars, compared to a planned investment in reducing air pollution of only 9 billion dollars per year. This estimate is conservative in part because it does not consider all social welfare aspects. A complete cost/benefit analysis of air pollution effects would have to include the impacts on human health, damage to buildings and effects on ecological systems other than forests.
The situation is not hopeless: the authors point out that reductions in pollution and improvements in policies could increase timber harvests by a total of 140 million cubic meters per year in Western and Eastern Europe
Pseudo-gradient and Lagrangian boundary control system formulation of electromagnetic fields
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