Xem 1-20 trên 261 kết quả Forest resources
  • The concept of forest sustainability dates from centuries ago, although the understanding of sustainable forest management (SFM) as an instrument that harmonizes ecological and socio-economic concerns is relatively new. The change in perspective occurred at the beginning of the 1990s in response to an increased awareness of the deterioration of the environment, in particular of the alarming loss of forest resources. The main and most striking cause of this deterioration is the deforestation occurring in some areas of the world.

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  • Sustainable forest management (SFM) is not a new concept. However, its popularity has increased in the last few decades because of public concern about the dramatic decrease in forest resources. SFM is generally implemented using criteria and indicators (C&I) that define forest management standards, and several countries have established their own sets of C&I within the framework of different international or regional processes. Nevertheless, none of the C&I systems have been universally accepted and future research should consider the current and future indicators....

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  • We acknowledge with gratitude the assistance of the following persons who have given their time and expertise to read and comment upon different portions of the manuscript: Froylan Castaneda (Food and Agriculture Organization, Rome, Italy); Eleanor Jones (Environmental Solutions Ltd.

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  • Le Trong Trai et al. (2001) argued that with an abundance of heavily degraded land available for rehabilitation, forest management and other land uses, there is considerable potential for cash earning activities in the buffer zone (for example through economic crop plantations). This activity would also reduce the overall pressure on the forest resources in the nature reserve. They also suggested that current arrangements for forest development and management in the bare lands are costly, create social tensions and seem to be unsustainable in the long run.

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Genetic improvement of oak KC Steiner in North America School of Forest Resources,Pennsylvania State University, University Park,...

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  • Research in tropical forestry is confronted with the task of finding strategies to alleviate pressure on remaining forests, and techniques to enhance forest regeneration and restore abandoned lands, using productive alternatives that can be attractive to local human populations. In addition, sustainable forestry in tropical countries must be supported by adequate policies to promote and maintain specific activities at local and regional scales.

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  • T he Earth has been blessed with an abundant supply of natural resources. Natural resources are those elements that exist on the planet for the use and benefit of all living things. Scientists commonly divide them down into distinct groups for the purposes of studying them. These groups include agricultural resources, plants, animals, energy sources, landscapes, forests, minerals, and water and atmospheric resources.

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  • William Bentley is the principal of Salmon Brook Associates in North Granby CT. He recently retired as Professor of Forest Policy and Management at the SUNY College of Environmental Science and Forestry, Syracuse NY, where he was Chair, Faculty of Forest and Natural Resources Management. He taught forest and natural resource economics at Michigan, Yale and other universities, managed Forestry Research for the Crown Zellerbach Corporation in the 1970s, worked for the Ford Foundation in New Delhi, India, and later was a senior program officer with Winrock International.

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  • Forest ecosystems cover large parts of the terrestrial land surface and are major components of the terrestrial carbon (C) cycle. Most important, forest ecosystems accumulate organic compounds with long C residence times in vegetation, detritus and, in particular, the soil by the process of C sequestration. Trees, the major components of forests, absorb large amounts of atmospheric carbon dioxide (CO2) by photosynthesis, and forests return an almost equal amount to the atmosphere by auto- and heterotrophic respiration.

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  • This book is designed to help forest owners, loggers, and others better understand the Forest Practices Rules and how they protect public resources, such as fish, water, wildlife, and state and municipal capital improvements. In it, you’ll find commonly encountered rules, with photographs and illustrations that show what these operations look like.

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  • The process of implementing multi-sector economic policies and the movement towards forestry strategy, from State’s forestry management to people’s forestry management appear a lot of new factors, especially diversification of forest resource management approaches - Community participated in in forest management is one the forest management forms attracted the interest in the central and local levels. In terms of Vietnam history, community forest has long existed in the communities based forest.

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  • The Government of Canada’s Interim Plan 2001 on Particulate Matter and Ozone includes a commitment to develop an action plan to reduce VOC from products. The $120.2 million package for clean air initiatives announced in the budget of February 2001 included resources for development and implementation of this plan, with additional resources for work on VOC-containing products included as part of the $40 million provided in the budget of February 2003.

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  • Further, Le Trong Trai et al. (2001) described that payments from these national forestry programs have provided benefits to villagers in the short term, and Acacia spp. and pine plantations established under these programs are growing reasonably well. However, villagers brought attention to a number of problems they had to face in response to the needs of the national forestry programs.

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  • In Phong Dien district, the main species for plantation establishment are Acacia auriculiformis, Acacia mangium and Pinus kesiya, selected by project managers of the national forestry programs. The total area under forest plantation is substantial: according to Phong Dien Forest Enterprise, 30,366 ha of plantations have now been established in the three communes of Phong Dien district near the buffer zone, with support from the 327 and 661 programs. Most plantations have been established on flat lands and lower slopes, for accessibility and financial reasons.

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  • (BQ) Ebook Earth science: Earth's Resources Science helps you know describe three ways that forests supply resources for organisms that live on Earth; how can water get polluted? How can you help reduce the negative impact that humans can have on the environment? Which source of energy do you think has the most benefits?.

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  • The planet is a marvelous place with its blue skies, wild storms, deep lakes, and rich and diverse ecosystems. The tides ebb and flow, baby animals are born in the spring, and tropical rain forests harbor an astonishing array of life. The Earth sustains living things and provides humans with the resources they need to maintain a bountiful way of life. These resources include water, soil, and nutrients to grow food, and the mineral and energy resources to build and fuel modern society, among many other things....

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  • The planet is a marvelous place: a place with blue skies, wild storms, deep lakes, and rich and diverse ecosystems. The tides ebb and flow, baby animals are born in the spring, and tropical rain forests harbor an astonishing array of life. The Earth sustains living things and provides humans with the resources to maintain a bountiful way of life: water, soil, and nutrients to grow food, and the mineral and energy resources to build and fuel modern society, among many other things.

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  • Focusing on the rich biodiversity of Costa Rica, the contributors demonstrate the use of geographic information systems (GIS) to enhance conservation efforts. They give an overview of the spatial nature of conservation and management and the current status of digital mapping in Costa Rica; a review of the basic principles behind digital mapping technologies; a series of case studies using these technologies at a variety of scales and for a range of conservation and management activities; and the results of the Costa Rican gap analysis project....

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  • Due to demands placed on natural resources globally and subsequent deterioration of the environment, there is a need to source and develop appropriate technology to satisfy this requirement. For decades mankind has largely depended on natural resources such as fossil fuels to meet the ever increasing energy demands. Realizing the finite nature of these resources, emphasis is now shifting to investigating alternate energy source governed by environmentally friendly principles.

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  • The last quarter-century has seen increasing awareness of the interactions between human societies and the natural environment in which they thrive and upon which they depend. This awareness has been heightened by concerns about resource scarcity, environmental degradation, and global environmental issues. The combination of increased awareness of the environment and recognition of the primitive state of much of the nation’s environmental data has led to a widespread desire to supplement U.S. national economic accounts to include natural resources and environmental assets.

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