e-book

Forest Trees

---

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.

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. 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 remaining natural forests and to provide raw materials in forms more suitable for commercial use and the needs of human society.

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.

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.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

-

No. Panggil

-

Penerbit

Washington, D.C. : National Academies Press., 1991

Deskripsi Fisik

248 pages, 6 x 9, (1991)

Bahasa

English

ISBN/ISSN

0-309-54306-1

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KEHUTANAN

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar