Ecological Effects of Pesticides on Non-target Species
Author: David Pimentel
Publisher:
Published: 1971
Total Pages: 228
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: David Pimentel
Publisher:
Published: 1971
Total Pages: 228
ISBN-13:
DOWNLOAD EBOOKAuthor: Jeffrey M. Klopatek
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 407
ISBN-13: 1461205298
DOWNLOAD EBOOKGrowth in the field of landscape ecology has included the development of methods and results that can be applied to an impressive range of environmental issues. This book addresses a broad spectrum of political, theoretical and applied aspects that often arise in the design and execution of landscape studies. The concepts of geographical scale and hierarchy arising within the confines of landscape ecology are examined, and a series of techniques are presented to address problems in spatial and temporal analysis. This book will provide the reader with a current perspective on this rapidly evolving science.
Author: James W. Meade
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 184
ISBN-13: 1461564700
DOWNLOAD EBOOKAlthough some nations, such as Japan, have invested in aquaculture research and developed major aquaculture industries, the opportunities for similar devel opment in the United States remain largely unnoticed. In a typical recent year the United States, which claims 20% of the world's marine fisheries resources, imported seafood worth $4. 8 billion and exported $l. 3 billion. In addition to the $3. 5 billion deficit in food-fish, was another $2. 7 billion deficit for nonedible fishery products. Next to oil, fishery products constituted the second highest drain on the United States balance of payments and accounts for a significant portion of the foreign trade deficit. Furthermore, fish consumption has been increasing in North America. In response to the demand for fishery products, aquaculture managers not only have the opportunity to realize economic profit, but in doing so can make an important contribution to reducing the national debt, providing employment, and enhancing our diet. This book might be considered a farm management text for those in aquaculture. It is intended to provide an introduction to aquaculture principles and an introduction to management, including business and people management, microeconomics, and the concepts of efficiency and productivity. I hope it will bridge the gap between conservationists, the academic community, and commer cial culturists. Abundant references should enable the reader to quickly access literature on most topics germane to the management of culture systems.
Author: United States. Congress. Senate. Special Committee on Aging
Publisher:
Published: 2008
Total Pages: 424
ISBN-13:
DOWNLOAD EBOOKAuthor: John Skilling
Publisher: Springer Science & Business Media
Published: 2013-06-29
Total Pages: 521
ISBN-13: 9401578605
DOWNLOAD EBOOKCambridge, England, 1988
Author: Paul R. Ehrlich
Publisher: Oxford University Press
Published: 2004-03-18
Total Pages: 408
ISBN-13: 0198035942
DOWNLOAD EBOOKHanski, a leading thinker in metapopulation ecology, studies checkerspot butterfly populations in Finland. Ehrlich, one of the leading ecologists and conservation biologist, investigates checkerspot butterfly populations in California. This book reports on and synthsizes the major long-term research of both workers' careers on the population biology of checkerspot butterflies.
Author: Michael G. Barbour
Publisher: Cambridge University Press
Published: 2000
Total Pages: 622
ISBN-13: 9780521559867
DOWNLOAD EBOOKThis second edition provides extensively expanded coverage of North American vegetation from arctic tundra to tropical forests.
Author: John Walter Thomson
Publisher: Univ of Wisconsin Press
Published: 1984
Total Pages: 696
ISBN-13: 9780299134600
DOWNLOAD EBOOKLists a total of 965 species in 168 genera in the two volumes, describing the species including distribution maps covering Alaska, Canada, Greenland and Iceland. Includes an overview of the geology, climate, geography and ecology of the American arctic.
Author: Eric Hultén
Publisher: Stanford University Press
Published: 1968
Total Pages: 1050
ISBN-13: 9780804706438
DOWNLOAD EBOOKThis monumental work by the world's preeminent authority on Arctic floras--the first comprehensive, up-to-date botanic manual for this region--is the product of the author's more than forty years of study of circumpolar floras. The book describes and illustrates all flowering plants and vascular cryptograms known to occur in Alaska, the Yukon, the Mackenzie District, and the eastern extremity of Siberia. Some 1,974 taxa, belonging to 1,559 species, occur in this region; all are described. For 1,735 of these, the book provides detailed description, nomenclature, plant drawing, and range maps. In each case, one map gives distribution in the Alaskan region; a second, on circumpolar projection, gives worldwide range. This volume is the first major flora to assemble such comprehensive range data and to provide such maps. An analytic key to all species described is provided for each genus, and there is an artificial key to families. An Introduction describes the past and present climatic, geologic, and ecologic character of the regions covered, the history of botanical collection in these regions, and the book's treatment of botanical and taxonomic details; and lists the plants of neighboring regions likely to occur. Glossary, plant authors' list, bibliography, and indexes are provided. The superb drawings were prepared by Dagny Tande-Lid, and eight pages of illustration in color are included.
Author: Walter Woelber Dalquest
Publisher:
Published: 1948
Total Pages: 444
ISBN-13:
DOWNLOAD EBOOK