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Displaying records 41 through 50 of 904 |
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Price: $150.00
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Sale: $99.95
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Manufacturer: Cambridge University Press
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Number of Items: 1
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Binding: Hardcover
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Author: R. Norman Owen-Smith
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Publisher: Cambridge University Press
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Edition: 1
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Dewey Decimal Number: 591.54
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Publication Date: 2002-07-15
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Reading Level: 432
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Description: The adaptation of herbivore behavior to seasonal and locational variations in vegetation quantity and quality is inadequately modelled by conventional methods. Norman Owen-Smith innovatively links the principles of adaptive behavior to their consequences for population dynamics and community ecology, through the application of a metaphysiological modeling approach. The main focus is on large mammalian herbivores occupying seasonally variable environments such as those characterized by African savannas, but applications to temperate zone ungulates are also included. Issues of habitat suitability, species coexistence, and population stability or instability are similarly investigated.
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Manufacturer: Dioscorides Press
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Number of Items: 1
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Binding: Hardcover
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Author: Robert R. Brooks
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Publisher: Dioscorides Press
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Dewey Decimal Number: 581.5222
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Publication Date: 1987-05-01
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Reading Level: 462
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Description: An exhaustive worldwide survey of serpentine soils and the characteristic vegetation that they support. It includes a continent-by-continent listing of known serpentine locations.
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Manufacturer: Oxford University Press, USA
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Number of Items: 1
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Binding: Hardcover
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Publisher: Oxford University Press, USA
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Dewey Decimal Number: 577.3097191
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Publication Date: 2001-04-26
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Reading Level: 544
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Description: The boreal forest is one of the world's great ecosystems, stretching across North America and Eurasia in an unbroken band and containing about 25% of the world's closed canopy forests. The Kluane Boreal Forest Ecosystem Project was a 10-year study by nine of Canada's leading ecologists to unravel the impact of the snowshoe hare cycle on the plants and the other vertebrate species in the boreal forest. In much of the boreal forest, the snowshoe hare acts as a keystone herbivore, fluctuating in 9-10 year cycles, and dragging along secondary cycles in predators such as lynx and great-horned owls. By manipulating the ecosystem on a large scale from the bottom via fertilizer additions and from the top by predator exclosures, they have traced the plant-herbivore relationships and the predator-prey relationships in this ecosystem to try to answer the question of what drives small mammal population cycles. This study is unique in being large scale and experimental on a relatively simple ecosystem, with the overall goal of defining what determines community structure in the boreal forest.
Ecosystem Dynamics of the Boreal Forest: The Kluane Project summarizes these findings, weaving new discoveries of the role of herbivores-turned-predators, compensatory plant growth, and predators-eating-predators with an ecological story rich in details and clear in its findings of a community where predation plays a key role in determining the fate of individuals and populations. The study of the Kluane boreal forest raises key questions about the scale of conservation required for boreal forest communities and the many mammals and birds that live there.
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Price: $19.97
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Sale: $9.46
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Manufacturer: Timber Press, Incorporated
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Number of Items: 1
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Binding: Hardcover
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Author: David R. Given
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Publisher: Timber Press, Incorporated
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Dewey Decimal Number: 333.95316
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Publication Date: 1995-01-01
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Reading Level: 292
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Description: Sponsored by the World Conservation Union and the World Wide Fund for Nature, this is the first systematic treatment of conservation principles and practices for rare, threatened, or disappearing plant species.
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Price: $23.00
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Sale: $14.95
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Manufacturer: The MIT Press
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Number of Items: 1
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Binding: Paperback
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Author: Jane Rissler::Margaret Mellon
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Publisher: The MIT Press
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Dewey Decimal Number: 631.523
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Publication Date: 1996-04-05
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Reading Level: 192
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Description: What will it mean to have a steady stream of animal and microbial genes entering the gene pools of plants in wild ecosystems?
Private companies and the federal government are pouring significant resources into biotechnology, and the major application of genetic engineering to agriculture is transgenic crops. This carefully reasoned science and policy assessment shows that the commercialization and release of transgenic crops on millions of acres of farmland can pose serious—and costly—environmental risks. The authors propose a practical, feasible method of conducting precommercialization evaluations that will balance the needs of ecological safety with those of agriculture and business, and that will assist governments seeking to identify and protect against two of the most significant risks.
Rissler and Mellon first define transgenic plants and review research currently under way in the field of crop biotechnology. They then identify and categorize the environmental risks presented by commercial uses of transgenic crops. These include the potential of transgenic crops to become weeds or to produce weeds with transgene properties such as herbicide resistance that may require costly control programs. Plants engineered to contain virus particles may facilitate the creation of new viruses that can affect economically important crops.
Looking at global seed trade, the authors discuss the relationship between commercial approval in the United States and environmental risks abroad. Of particular concern is the flow of novel genes into the centers of crop biodiversity, primarily in the developing world, that could threaten the genetic base of the world's future food supply.
The authors conclude by reviewing the current status of U.S. regulations governing transgenic crops. They discuss the difficulties that this new terrain presents to regulators, and offer recommendations concerning the commercial development, risk assessment, and regulation of these crops.
Copublished with the Union of Concerned Scientists
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Price: $247.00
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Sale: $247.00
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Manufacturer: Springer
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Number of Items: 1
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Binding: Hardcover
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Publisher: Springer
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Edition: 1st
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Dewey Decimal Number: 580
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Publication Date: 2001-01-15
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Reading Level: 250
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Description: This volume highlights fungal associations, as they are found in mycorrhizas, lichens and other fungal symbioses. The emphasis is laid upon the molecular biochemical and ultrastructural analysis of these interactions. Major progress has been achieved over the last few years by the systematic application of modern methods, developed mainly in molecular biology. The data are presented in high-quality illustrations, leading the reader from the subcellular to higher levels of organization where specific symbiotic traits become apparent. Early stages of symbiotic interactions are of special interest. They are compared to parasitic interrelations and also considered from an evolutionary standpoint.
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Manufacturer: Academic Pr
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Number of Items: 1
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Binding: Hardcover
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Author: Martyn M. Caldwell
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Publisher: Academic Pr
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Dewey Decimal Number: 581.5
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Publication Date: 1994-02
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Reading Level: 428
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Price: $265.50
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Sale: $205.57
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Manufacturer: Wiley
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Number of Items: 1
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Binding: Hardcover
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Author: David M. Orcutt::Erik T. Nilsen
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Publisher: Wiley
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Edition: 1
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Dewey Decimal Number: 581.2
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Publication Date: 2000-05-12
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Reading Level: 624
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Description: This second of a two-part treatise describes the phenomena of plants under stress, describing the relationship between plant structure, development, and growth and such environmental stresses as too much or too little water, light, heat, or cold.
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Manufacturer: Academic Press
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Number of Items: 1
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Binding: Paperback
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Author: John L. Harper
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Publisher: Academic Press
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Dewey Decimal Number: 581.524
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Publication Date: 1981-05
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Reading Level: 892
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Manufacturer: Academic Pr
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Binding: Hardcover
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Author: J. Levitt
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Publisher: Academic Pr
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Edition: 2 Sub
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Dewey Decimal Number: 581.24
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Publication Date: 1980-09
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Reading Level: 607
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Displaying records 41 through 50 of 904
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