Managing Global Genetic Resources forest trees by National Research Council pdf free download

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Managing Global Genetic Resources forest trees by National Research Council pdf free download

Managing Global Genetic Resources forest trees by National Research Council pdf free download. Forest trees are integral parts of human society. They provide fuel, fiber, construction and building materials, food, and medicines, among other things. The forest itself is an ecosystem, and as ecosystems, forests stabilize environments and are essential components of the global ecology. Although trees are the dominant vegetation, forests are rich reservoirs of biological diversity. They harbor a major proportion of the world’s animal and plant species.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

Forest trees also enhance and protect our landscapes. They sustain wildlife, industry, and rural economies, and contribute to the quality and richness of our environment. For many years, concern has been expressed about rapid and continuing losses of the world’s forests. In temperate regions of Europe and North America, the decline in forest health has been attributed to industrial consequences, such as acid rain. In the humid tropics, increased demands on the land resulting from the clearing of forests to accommodate expanding populations and the production of industrial products have been highlighted.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

The causes notwithstanding, the future for the world’s forests, if unprotected, is dim. For many forested areas, efforts to halt or slow losses through the establishment of protected areas will be essential. However, more than protection will be needed. Society will continue to need the services and products derived from the forest. As natural stands of trees are lost, greater efforts to conserve those remaining will continue. There will be more need to select and develop trees and forests that are managed for production purposes to reduce pressure on the remainingnatural forests and to provide raw materials in forms more suitable for commercial use and the needs of human society.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

To develop these future forests, the genetic resources of forest trees must be conserved and developed, whether they exist as trees in planted or protected conservation stands or as seeds or tissue cultures in storage (or one day possibly as DNA libraries). Managing forest genetic resources involves developing overall strategies, applying specific methodologies, developing new techniques, and coordinating local, national, regional, and global efforts.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

Although tree species are similar in many ways to crop species, managing forest genetic resources is not simply a matter of applying programs for crops to larger plants. Forests generate a wide variety of product values, from the different components of the ecosystems that depend on their structural viability to the industrial and agroforestry crops that can be consumed, and the variety of systems that are used to manage them dictates the variety of ways that the genetic resources are used. Moreover, the genetic architecture of forest trees is poorly known, breeding is slow, and wide variations in ecological and economic environments must be anticipated to use the available genetic variation efficiently.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

This report, while recognizing serious threats to all the species and ecosystems represented in the world’s forests, focuses on managing those forest trees from which harvested materials are currently extracted. Protection of the world’s forest ecosystems will require broad efforts by scientists and policymakers. A report prepared by the Commission on Life Sciences in cooperation with the Board on Agriculture, entitled Forestry Research: A Mandate for Change (National Research Council, 1990), recommends modifications in the way forestry research is conducted to bring about many needed improvements in the forestry research community.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

Careful, well coordinated management of those tree species of current or future harvest potential could play an important part in reducing deforestation pressures on the remaining pristine vegetation. Although the total number of known forest tree species exceeds 50,000 and potential extractive use can be made of several thousand species, current efforts to manage trees focus primarily on fewer than 140 species. Clearly, greater efforts and coordination are needed to sustain even the current levels of forest production and to realize the potential productivity of as yet undeveloped species.

Managing Global Genetic Resources forest trees by National Research Council pdf free download

Managing Global Genetic Resources forest trees by National Research Council pdf free download


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