Effect of Prolonged Drought on Water Relations of Ponderosa Pine Seedlings Growing in Basalt and Sedimentary Soils PDF Download
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Author: L. J. Heidmann
Publisher:
ISBN:
Category : Plant-water relationships
Languages : en
Pages : 12
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Book Description
Author: L. J. Heidmann
Publisher:
ISBN:
Category : Plant-water relationships
Languages : en
Pages : 12
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Book Description
Author:
Publisher:
ISBN:
Category : Cumulative effects assessment (Environmental assessment)
Languages : en
Pages : 306
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Book Description
Author: Hans Jenny
Publisher: Springer Science & Business Media
ISBN: 1461261120
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
change is simply described by the rate of income and rate of loss. Our home's energy budget, our firm's inventory, our nation's debt, and humanity's numbers all have accounts that change at rates that are equal to the inputs minus the outputs. Jenny's "system view" of the soil was carried into the fertile fields of Midwestern American prairies from the laboratories of Switzerland in the late 1920s. Jenny's rate equations provided the other paradigm or world view that, I recall, brought us to the threshold of systems ecology as it later evolved in the second half of the twentieth century. As if world renown in the specialties of pedology and soil chemistry were not enough for one lifetime, excerpts below remind us that Hans Jenny has also been a perceptive outdoor field ecologist since his early Alpine expeditions with Braun Blanquet in the mid 1920s. Jenny's ecosystem studies in the pygmy forest, a further classic example of a soil-plant system "run down" over hundreds of thousands of years since its origin, continue to occupy some of the vigorous retirement time near his farm in Mendocino County. But each specific, quantitative case study, and each research area conserved (with additional hard work) for further study by future generations, fits into Jenny's coherent world view. It is that view, and its legacies of discovery and of tangible landscape preserves, which we are privileged to share with their originator in this volume.
Author:
Publisher:
ISBN:
Category : Communities
Languages : en
Pages : 280
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Book Description
Author: Mark E. Fenn
Publisher: Springer Science & Business Media
ISBN: 9780387953373
Category : Medical
Languages : en
Pages : 436
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Book Description
With a population of more than eighteen million people, Mexico City is a major metropolitan area where the effects of urban development on air quality are of immediate concern. Air pollution exposures and effects on forests in the Mexico City Air Basin are in many respects similar to those reported in the Los Angeles, California Air Basin. Studies of air pollution impacts on forests in these two regions may serve as models for urban areas all over the world. Although scientists have studied air pollution and its effects on forests and vegetation in the Mexico City Air Basin for years, this book reviews and synthesizes this body of work for the first time. This synthesis is particularly valuable as air pollution increases at an alarming rate along with global urbanization. A thorough discussion of regional geology, climate and hydrology, historical natural resource utilization, and sociological factors provide the context for evaluating air pollution impacts on the highly valued forests surrounding this megacity. The environmental and ecological consequences of chronic exposure to biologically important pollutants are considered in various case studies. Finally, the editors discuss the state of air pollution research in the Mexico City Air Basin and the outlook for the health and sustainability of forests within the Basin.
Author: W. J. Rietveld
Publisher:
ISBN:
Category : Plant regulators
Languages : en
Pages : 8
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Book Description
Author: United States. Forest Service. Pacific Northwest Region
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 28
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Book Description
Author: Devendra Amatya
Publisher: CABI
ISBN: 1780646607
Category : Technology & Engineering
Languages : en
Pages : 309
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Book Description
Forests cover approximately 26% of the world's land surface area and represent a distinct biotic community. They interact with water and soil in a variety of ways, providing canopy surfaces which trap precipitation and allow evaporation back into the atmosphere, thus regulating how much water reaches the forest floor as through fall, as well as pull water from the soil for transpiration. The discipline "forest hydrology" has been developed throughout the 20th century. During that time human intervention in natural landscapes has increased, and land use and management practices have intensified. The book will be useful for graduate students, professionals, land managers, practitioners, and researchers with a good understanding of the basic principles of hydrology and hydrologic processes.
Author:
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ISBN:
Category : Geographic information systems
Languages : en
Pages : 6
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Book Description
The PRAIRIEMAP web site (http://prairiemap.wr.usgs.gov) contains links to partners, documentation of the data, and a directory of GIS data that can be downloaded.
Author: Brenda C. McComb
Publisher: CRC Press
ISBN: 1420007637
Category : Nature
Languages : en
Pages : 338
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Book Description
In recent years, conflicts between ecological conservation and economic growth forced a reassessment of the motivations and goals of wildlife and forestry management. Focus shifted from game and commodity management to biodiversity conservation and ecological forestry. Previously separate fields such as forestry, biology, botany, and zoology merged
