Temporal Analysis of Breeding Structure in Jack Pine (Pinus Banksiana Lamb.) PDF Download

Author: T. P. Snyder
Publisher:
ISBN:
Category :
Languages : en
Pages : 8

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Author: David M. Richardson
Publisher: Cambridge University Press
ISBN: 9780521789103
Category : Nature
Languages : en
Pages : 556

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A comprehensive review essential for all involved in the management of natural and planted pine forests.

Author: W.T. Adams
Publisher: Springer Science & Business Media
ISBN: 9401128154
Category : Science
Languages : en
Pages : 423

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Book Description
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.

Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 692

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Author: OECD
Publisher: OECD Publishing
ISBN: 9264095438
Category :
Languages : en
Pages : 327

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These OECD Biosafety Consensus Documents identify elements of scientific information used in the environmental safety and risk assessment of transgenic organisms which are common to OECD member countries and some non members associated with the work.

Author: William K. Smith
Publisher: Academic Press
ISBN: 0080925936
Category : Technology & Engineering
Languages : en
Pages : 352

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Conifers--pine, fir, and spruce trees--are dominant species in forests around the world. This book focuses on the physiology of conifers and how these physiological systems operate. Special consideration is devoted to the means by which ecophysiological processes influence organismal function and distribution. Chapters focus on the genetics of conifers, their geographic distribution and the factors that influence this distribution, the impact of insect herbivory on ecophysiological parameters, the effects of air pollution, and the potential impact that global climatic changes will have upon conifers. Because of the growing realization that forests have a crucial role to play in global environmental health, this book will appeal to a developing union of ecologists, physiologists and more theoretically minded foresters.

Author: Douglas E. Soltis
Publisher: Springer Science & Business Media
ISBN: 9400918402
Category : Science
Languages : en
Pages : 273

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Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 476

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Author:
Publisher:
ISBN:
Category : Forest genetics
Languages : en
Pages : 864

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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 628

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