Download or read book General Technical Report WO written by and published by . This book was released on 1981 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Genetics of Forest Trees written by W.T. Adams and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tropical climates, which occur between 23°30'N and S latitude (Jacob 1988), encompass a wide variety of plant communities (Hartshorn 1983, 1988), many of which are diverse in their woody floras. Within this geographic region, temperature and the amount and seasonality of rainfall define habitat types (UNESCO 1978). The F AO has estimated that there 1 are about 19 million km of potentially forested area in the global tropics, of which 58% were estimated to still be in closed forest in the mid-1970s (Sommers 1976; UNESCO 1978). Of this potentially forested region, 42% is categorized as dry forest lifezone, 33% is tropical moist forest, and 25% is wet or rain forest (Lugo 1988). The species diversity of these tropical habitats is very high. Raven (1976, in Mooney 1988) estimated that 65% of the 250,000 or more plant species of the earth are found in tropical regions. Of this floristic assemblage, a large fraction are woody species. In the well-collected tropical moist forest of Barro Colorado Island, Panama, 39. 7% (481 of 1212 species) of the native phanerogams are woody, arborescent species (Croat 1978). Another 21. 9% are woody vines and lianas. Southeast Asian Dipterocarp forests may contain 120-200 species of trees per hectare (Whitmore 1984), and recent surveys in upper Amazonia re corded from 89 to 283 woody species ~ 10 cm dbh per hectare (Gentry 1988). Tropical communities thus represent a global woody flora of significant scope.
Download or read book Biodiversity and Landscapes written by Ke Chung Kim and published by Cambridge University Press. This book was released on 1994-08-26 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experts from different disciplines discuss the nature, origin and possible solutions to the problem of landscape degradation and diminishing global biodiversity.
Download or read book Nantahala National Forest N F Pisgah National Forest N F Land and Resource s Management Plan LRMP written by and published by . This book was released on 1987 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Textbook of Dendrology written by William Morehouse Harlow and published by McGraw-Hill Companies. This book was released on 1991 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regional Aquifer System Analysis Program of the U S Geological Survey written by John B. Weeks and published by . This book was released on 1987 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Archaeological Method and Theory written by Michael B Schiffer and published by Academic Press. This book was released on 2014-06-30 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Archaeological Method and Theory, Volume 11 is a collection of papers that discusses world systems theory, modeling interregional interaction in prehistory, and the archaeological analysis of ceramics. Some papers review dating and weathering of inorganic materials, strategies for paleo-environmental reconstruction, as well as deposits and depositional events. One paper reviews the Old World state formation that occurred in West Asia during the fourth and third millennia B.C. Another paper examines the role of interactions among societies in the process of local social change, and the need for archaeologists to develop a framework in which to analyze intersocietal interaction processes. The presence of items such as ceramics is associated directly to factors of availability, functions, economic values, or ethnic affiliation. As an example, one paper cites the use and misuse of English and American ceramics in archaeological analysis in identifying cultural patterns and human behavior. Another paper notes that each biological or mechanical agent of transport and deposition has its own respective attributes on a deposit where the attributes of sedimentary particles on the deposit can be defined. From such definitions, the archaeologists can make observations and inferences. Sociologists, anthropologist, ethnographers, museum curators, professional or amateur archaeologists, and academicians studying historical antiquities will find the collection very useful.
Download or read book Tree Breeding Principles and Strategies written by G. Namkoong and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has become apparent, during discussions with students and colleagues in forest genetics, that a universal concern is the achievement of diverse goals of forestry from fiber production in industrial as well as farm forests to conserving forest ecosystems. Although we generally have several breeding methods available and several species to breed, we seek to satisfy multiple-use goals on diverse sites by management techniques that at best can only partially control edaphic environmental variation. The dominant approach, which was agriculturally motivated, has involved inten sive effort with complicated breeding plans on single species for uniform adaptability and single-product plantations. However, this is obviously neither the only, nor necessarily the best, solution for the genetic management of tree species, and thus our intent in this volume is to develop ways to achieve multiple objectives in tree breeding. We include an array of breeding plans from simple iterated designs to sets of multiple populations capable of using gene actions for different traits in different environments for uncertain futures. The presentation is organized around the development of breeding from single-to multiple-option plans, from single to multiple traits, from single to mUltiple environ ments, and from single to multiple populations. However, it is not a complete "How To" book, and includes neither exercises nor instructions on data handling. It also does not include discussion of all modes of reproduction and inheritance encountered in plants.
Download or read book Publications written by and published by . This book was released on 1980 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dendrogeomorphic Evidence and Dating of Recent Debris Flows on Mount Shasta Northern California written by C. R. Hupp and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virginia Round leaf Birch Recovery Plan written by Terry L. Sharik and published by . This book was released on 1982 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technologies to Maintain Biological Diversity written by and published by . This book was released on 1986 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotic Diversity and Germplasm Preservation Global Imperatives written by Lloyd Knutson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics for the Beltsville Symposia are selected to highlight specific areas of research and science policy that are of concern to scientists in the Beltsville Area as well as to the general scientific community. Each sympo sium in the series is structured to provide a realistic appraisal of current findings, research progress, and relevant policy issues within the constraints established by the organizing committee. Thus, the presentations and dis cussions that have marked these symposia have had a strong appeal to the broad community of scientists. Knowledge of the diversity of living organisms is still quite limited. Since the time of Linnaeus, about 1.7 million species have been described. The actual number has been estimated between 5-50 million. Many species, land races, and strains are vanishing. Clearly, the world's scientific institutions are inadequately equipped to attain sufficient knowledge of a significant fraction of the diverse living forms. Also, efforts in the collection and preservation of germplasm of plants and animals urgently need to be strengthened. These mattes are critically important to future generations. This symposium addresses vital concerns of biotic diversity and germ plasm preservation from diverse perspectives. Many of the parts provide concrete recommendations for action, and they call attention to areas of research that must be pursued with intensity.
Download or read book Tree Improvement Plan for Northeastern Area State and Private Forestry United States Department of Agriculture Forest Service written by Leroy C. Johnson and published by . This book was released on 1984 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications Pacific Southwest Forest and Range Experiment Station written by Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) and published by . This book was released on 1979 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trends in Commercial Timberland Area in the United States by State and Ownership 1952 77 with Projections to 2030 written by Brian R. Wall and published by . This book was released on 1981 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
