Product details
- Publisher : National Academies Press; Illustrated edition (May 13, 2007)
- Language : English
- Paperback : 326 pages
- ISBN-10 : 0309102898
- ISBN-13 : 978-0309102896
- Dimensions : 6 x 9 inches
$76.00
by National Research Council (Author), Division on Earth and Life Studies (Author), Board on Agriculture and Natural Resources (Author), Board on Life Sciences (Author), Committee on the Status of Pollinators in North America (Author)
Pollinators—insects, birds, bats, and other animals that carry pollen from the male to the female parts of flowers for plant reproduction—are an essential part of natural and agricultural ecosystems throughout North America. For example, most fruit, vegetable, and seed crops and some crops that provide fiber, drugs, and fuel depend on animals for pollination.</p> <p>This report provides evidence for the decline of some pollinator species in North America, including America’s most important managed pollinator, the honey bee, as well as some butterflies, bats, and hummingbirds. For most managed and wild pollinator species, however, population trends have not been assessed because populations have not been monitored over time. In addition, for wild species with demonstrated declines, it is often difficult to determine the causes or consequences of their decline. This report outlines priorities for research and monitoring that are needed to improve information on the status of pollinators and establishes a framework for conservation and restoration of pollinator species and communities.
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Illustrated Edition
by David J. Gibson (Author)
Grasslands, in particular managed pastures and rangelands, are widespread, covering approximately 40% (52 million km²) of the Earth's land surface. They are dominated by members of the Poaceae - the fourth largest plant family with over 7,500 species, and also the most widespread. Grasslands constitute a major biome on all continents except Antarctica and also represent the most important food crop on Earth with corn, wheat, maize, rice and millet accounting for the majority of our agricultural output. Grasses and Grassland Ecology provides an ecologically orientated introduction to this influential group of plants, summarizing the most recent scientific research in ecology and agriculture in the context of the older, classic literature. Ten chapters cover the morphology, anatomy, physiology and systematics of grasses, their population, community and ecosystem ecology, their global distribution, and the effects of disturbance and grassland management. This comprehensive and accessible textbook is suitable for graduate level students as well as professional researchers in the fields of plant ecology, rangeland science, crop science, and agriculture.
(Series; 16) 1995th Edition
by O.W. Archibold (Author)
The ecology of world vegetation is described in numer all of the drafting and photographic work. They have ous books and journals, but these are usually very spe spent many hours on this project and their care and skill cialized in their scope and treatment. This book provides is reflected in the consistently high quality of the illus a synthesis of this literature. A brief introductory chap trations throughout the book. Many friends and col ter outlines general ecological concepts and subsequent leagues have provided photographs. It has not been chapters examine the form and function of the major possible to include all of them, but the 'global' perspect biomes of the world. A similar organization has been ive of the book has been greatly enhanced in this way. used for each biome type. These chapters begin with a I wish to thank them all for the time and trouble they description of environmental conditions and a brief have taken to supply this material. I must also thank account of floristic diversity in a regional context. The Mary Dykes and the staff of the interlibrary loans de remaining pages describe characteristic adaptations and partment of the Library, University of Saskatchewan, ecosystem processes. for their unfailing ability to get even the most obscure Although there is a rapidly growing literature on eco references.
Paperback – November 20, 2011
by Mary T. Kalin Arroyo (Editor), Paul H. Zedler (Editor), Marlyn D. Fox (Editor)
st ed. 2016 Edition
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