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Author:
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ISBN:
Category : Natural history
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 258
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Author:
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ISBN:
Category : Natural history
Languages : en
Pages : 602
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Author: University of Texas at Austin
Publisher:
ISBN:
Category :
Languages : en
Pages : 316
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Author: Martin F. Quigley
Publisher: Oxford University Press
ISBN: 0199898219
Category : Science
Languages : en
Pages : 513
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The invasive species Tamarix first attracted the public eye in the 1990's when it was suspected of contributing to widespread drought and wildfires in the Western United States. Once purported to consume as much water as entire cities, very few plant species have received as much scientific, public, and political discussion and debate as Tamarix. Written by 44 of the field's most prominent scholars and scientists, this volume compiles 25 essays on this fascinating species--its biology, ecology, politics, management, and the ethical issues involved with designating a particular species as "good" or "bad". The book analyzes the controversy surrounding the Tamarisk's role in our ecosystems and what should be done about it.
Author: Daniel G. Milchunas
Publisher:
ISBN:
Category : Grazing
Languages : en
Pages : 134
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Book Description
Grazing by wild and domestic mammals can have small to large effects on plant communities, depending on characteristics of the particular community and of the type and intensity of grazing. The broad objective of this report was to extensively review literature on the effects of grazing on 25 plant communities of the southwestern U.S. in terms of plant species composition, aboveground primary productivity, and root and soil attributes. Livestock grazing management and grazing systems are assessed, as are effects of small and large native mammals and feral species, when data are available. Emphasis is placed on the evolutionary history of grazing and productivity of the particular communities as determinants of response. After reviewing available studies for each community type, we compare changes in species composition with grazing among community types. Comparisons are also made between southwestern communities with a relatively short history of grazing and communities of the adjacent Great Plains with a long evolutionary history of grazing. Evidence for grazing as a factor in shifts from grasslands to shrublands is considered. An appendix outlines a new community classification system, which is followed in describing grazing impacts in prior sections.
Author: Janice Emily Bowers
Publisher: Western National Parks Association
ISBN: 9780911408799
Category : Travel
Languages : en
Pages : 68
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Chiricahua's delicate spires, massive columns, and huge balanced rocks are eroded remnants of volcanic rhyolite. These rugged mountains in southeastern Arizona, once home to Apaches led by Cochise and Geronimo, shelter a remarkable diversity of flora and fauna from four intersecting biomes. Photos by George H. H. Huey.
Author: Gerardo Ceballos
Publisher: JHU Press
ISBN: 1421408430
Category : Nature
Languages : en
Pages : 976
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The most comprehensive reference on Mexico's diverse mammalian fauna. Mammals of Mexico is the first reference book in English on the more than 500 types of mammal species found in the diverse Mexican habitats, which range from the Sonoran Desert to the Chiapas cloud forests. The authoritative species accounts are written by a Who’s Who of experts compiled by famed mammalogist and conservationist Gerardo Ceballos. Ten years in the making, Mammals of Mexico covers everything from obscure rodents to whales, bats, primates, and wolves. It is thoroughly illustrated with color photographs and meticulous artistic renderings, as well as range maps for each species. Introductory chapters discuss biogeography, conservation, and evolution. The final section of the book illustrates the skulls, jaws, and tracks of Mexico’s mammals. This unparalleled collection of scientific information on, and photographs of, Mexican wildlife belongs on the shelf of every mammalogist, in public and academic libraries, and in the hands of anyone curious about Mexico and its wildlife.
Author: William Lee Halvorson
Publisher: University of Arizona Press
ISBN: 9780816528172
Category : Science
Languages : en
Pages : 384
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Book Description
Yet Matt Ridley does more than describe how things are getting better. He explains why. Prosperity comes from everybody working for everybody else. The habit of exchange and specialization---which started more than 100,000 years ago---has created a collective brain that sets human living standards on a rising trend. The mutual dependence, trust, and sharing that result are causes for hope, not despair. --
Author: National Agricultural Library (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 1338
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