Author: G.W. Heil
Publisher: Springer Science & Business Media
ISBN: 9400709692
Category : Science
Languages : en
Pages : 226
Book Description
The main activities of the economically active population around The Iztaccíhuatl and Popocatépetl volcanoes region lie in the primary sector (65- 90%). Of the people working in this sector, those dependent on agricultural or pastoral activities generally have an income significantly lower than the minimum wage in Mexico. Of the activities in the area, these agricultural, pastoral, and forestry activities probably have the most direct effect on the ecology of the volcanoes and its immediate surroundings. Traditional farmers, producing crops such as beans, pumpkins and cucumbers, generally work on small fields using traditional methods and animal traction. Modern farming, geared towards intensive production develops on larger sites making use of modern machinery, fertilizers, and pesticides. As the area under agriculture continues to increase every year, the attendant opening of large forested areas, soil modification, and ensuing erosion make it almost impossible for forest recovery. Extensive forestry in the region mainly concerns cutting and collecting wood, cutting Pinus-branches for torches or for utensils for open-fire cooking, collection of mushrooms, and hunting. Although these (often clandestine) activities seem to be small-scale, their adverse effects on the forest have been substantial. Weekend visitors from Mexico City heavily dominate recreation, with tourism concentrated near the roads leading to and inside the park. Lacking organization and facilities, most recreational activities have had significant environmental impact on the area In many countries, the decline of nature has occurred because of changes in land use.
Ecology and Man in Mexico’s Central Volcanoes Area
Author: G.W. Heil
Publisher: Springer Science & Business Media
ISBN: 9400709692
Category : Science
Languages : en
Pages : 226
Book Description
The main activities of the economically active population around The Iztaccíhuatl and Popocatépetl volcanoes region lie in the primary sector (65- 90%). Of the people working in this sector, those dependent on agricultural or pastoral activities generally have an income significantly lower than the minimum wage in Mexico. Of the activities in the area, these agricultural, pastoral, and forestry activities probably have the most direct effect on the ecology of the volcanoes and its immediate surroundings. Traditional farmers, producing crops such as beans, pumpkins and cucumbers, generally work on small fields using traditional methods and animal traction. Modern farming, geared towards intensive production develops on larger sites making use of modern machinery, fertilizers, and pesticides. As the area under agriculture continues to increase every year, the attendant opening of large forested areas, soil modification, and ensuing erosion make it almost impossible for forest recovery. Extensive forestry in the region mainly concerns cutting and collecting wood, cutting Pinus-branches for torches or for utensils for open-fire cooking, collection of mushrooms, and hunting. Although these (often clandestine) activities seem to be small-scale, their adverse effects on the forest have been substantial. Weekend visitors from Mexico City heavily dominate recreation, with tourism concentrated near the roads leading to and inside the park. Lacking organization and facilities, most recreational activities have had significant environmental impact on the area In many countries, the decline of nature has occurred because of changes in land use.
Publisher: Springer Science & Business Media
ISBN: 9400709692
Category : Science
Languages : en
Pages : 226
Book Description
The main activities of the economically active population around The Iztaccíhuatl and Popocatépetl volcanoes region lie in the primary sector (65- 90%). Of the people working in this sector, those dependent on agricultural or pastoral activities generally have an income significantly lower than the minimum wage in Mexico. Of the activities in the area, these agricultural, pastoral, and forestry activities probably have the most direct effect on the ecology of the volcanoes and its immediate surroundings. Traditional farmers, producing crops such as beans, pumpkins and cucumbers, generally work on small fields using traditional methods and animal traction. Modern farming, geared towards intensive production develops on larger sites making use of modern machinery, fertilizers, and pesticides. As the area under agriculture continues to increase every year, the attendant opening of large forested areas, soil modification, and ensuing erosion make it almost impossible for forest recovery. Extensive forestry in the region mainly concerns cutting and collecting wood, cutting Pinus-branches for torches or for utensils for open-fire cooking, collection of mushrooms, and hunting. Although these (often clandestine) activities seem to be small-scale, their adverse effects on the forest have been substantial. Weekend visitors from Mexico City heavily dominate recreation, with tourism concentrated near the roads leading to and inside the park. Lacking organization and facilities, most recreational activities have had significant environmental impact on the area In many countries, the decline of nature has occurred because of changes in land use.
Ecology and Man in Mexico's Central Volcanoes Area
Author: Gerrit W. Heil
Publisher:
ISBN: 9781402017087
Category : Ecology
Languages : en
Pages : 222
Book Description
Publisher:
ISBN: 9781402017087
Category : Ecology
Languages : en
Pages : 222
Book Description
Conquistador
Author: Buddy Levy
Publisher: Bantam
ISBN: 0553384716
Category : History
Languages : en
Pages : 458
Book Description
In this astonishing work of scholarship that reads like an edge-of-your-seat adventure thriller, acclaimed historian Buddy Levy records the last days of the Aztec empire and the two men at the center of an epic clash of cultures perhaps unequaled to this day. It was a moment unique in human history, the face-to-face meeting between two men from civilizations a world apart. In 1519, Hernán Cortés arrived on the shores of Mexico, determined not only to expand the Spanish empire but to convert the natives to Catholicism and carry off a fortune in gold. That he saw nothing paradoxical in carrying out his intentions by virtually annihilating a proud and accomplished native people is one of the most remarkable and tragic aspects of this unforgettable story. In Tenochtitlán Cortés met his Aztec counterpart, Montezuma: king, divinity, commander of the most powerful military machine in the Americas and ruler of a city whose splendor equaled anything in Europe. Yet in less than two years, Cortés defeated the entire Aztec nation in one of the most astounding battles ever waged. The story of a lost kingdom, a relentless conqueror, and a doomed warrior, Conquistador is history at its most riveting.
Publisher: Bantam
ISBN: 0553384716
Category : History
Languages : en
Pages : 458
Book Description
In this astonishing work of scholarship that reads like an edge-of-your-seat adventure thriller, acclaimed historian Buddy Levy records the last days of the Aztec empire and the two men at the center of an epic clash of cultures perhaps unequaled to this day. It was a moment unique in human history, the face-to-face meeting between two men from civilizations a world apart. In 1519, Hernán Cortés arrived on the shores of Mexico, determined not only to expand the Spanish empire but to convert the natives to Catholicism and carry off a fortune in gold. That he saw nothing paradoxical in carrying out his intentions by virtually annihilating a proud and accomplished native people is one of the most remarkable and tragic aspects of this unforgettable story. In Tenochtitlán Cortés met his Aztec counterpart, Montezuma: king, divinity, commander of the most powerful military machine in the Americas and ruler of a city whose splendor equaled anything in Europe. Yet in less than two years, Cortés defeated the entire Aztec nation in one of the most astounding battles ever waged. The story of a lost kingdom, a relentless conqueror, and a doomed warrior, Conquistador is history at its most riveting.
Bulletin of the Atomic Scientists
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Archeology and Volcanism in Central America
Author: Payson D. Sheets
Publisher: University of Texas Press
ISBN: 1477300333
Category : Social Science
Languages : en
Pages : 318
Book Description
Scientists have long speculated on the impact of extreme natural catastrophes on human societies. Archeology and Volcanism in Central America provides dramatic evidence of the effects of several volcanic disasters on a major civilization of the Western Hemisphere, that of the Maya. During the past 2,000 years, four volcanic eruptions have taken place in the Zapotitán Valley of southern El Salvador. One, the devastating eruption of Ilopango around A.D. 300, forced a major migration, pushing the Mayan people north to the Yucatán Peninsula. Although later eruptions did not have long-range implications for cultural change, one of the subsequent eruptions preserved the Cerén site—a Mesoamerican Pompeii where the bodies of the villagers, the palm-thatched roofs of their houses, the pots of food in their pantries, even the corn plants in their fields were preserved with remarkable fidelity. Throughout 1978, a multidisciplinary team of anthropologists, archeologists, geologists, biologists, and others sponsored by the University of Colorado's Protoclassic Project researched and excavated the results of volcanism in the Zapotitan Valley—a key Mesoamerican site that contemporary political strife has since rendered inaccessible. The result is an outstanding contribution to our understanding of the impact of volcanic eruptions on early Mayan civilization. These investigations clearly demonstrate that the Maya inhabited this volcanically hazardous valley in order to reap the short-term benefits that the volcanic ash produced—fertile soil, fine clays, and obsidian deposits.
Publisher: University of Texas Press
ISBN: 1477300333
Category : Social Science
Languages : en
Pages : 318
Book Description
Scientists have long speculated on the impact of extreme natural catastrophes on human societies. Archeology and Volcanism in Central America provides dramatic evidence of the effects of several volcanic disasters on a major civilization of the Western Hemisphere, that of the Maya. During the past 2,000 years, four volcanic eruptions have taken place in the Zapotitán Valley of southern El Salvador. One, the devastating eruption of Ilopango around A.D. 300, forced a major migration, pushing the Mayan people north to the Yucatán Peninsula. Although later eruptions did not have long-range implications for cultural change, one of the subsequent eruptions preserved the Cerén site—a Mesoamerican Pompeii where the bodies of the villagers, the palm-thatched roofs of their houses, the pots of food in their pantries, even the corn plants in their fields were preserved with remarkable fidelity. Throughout 1978, a multidisciplinary team of anthropologists, archeologists, geologists, biologists, and others sponsored by the University of Colorado's Protoclassic Project researched and excavated the results of volcanism in the Zapotitan Valley—a key Mesoamerican site that contemporary political strife has since rendered inaccessible. The result is an outstanding contribution to our understanding of the impact of volcanic eruptions on early Mayan civilization. These investigations clearly demonstrate that the Maya inhabited this volcanically hazardous valley in order to reap the short-term benefits that the volcanic ash produced—fertile soil, fine clays, and obsidian deposits.
Ecology and Biogeography of Pinus
Author: David M. Richardson
Publisher: Cambridge University Press
ISBN: 9780521789103
Category : Nature
Languages : en
Pages : 556
Book Description
A comprehensive review essential for all involved in the management of natural and planted pine forests.
Publisher: Cambridge University Press
ISBN: 9780521789103
Category : Nature
Languages : en
Pages : 556
Book Description
A comprehensive review essential for all involved in the management of natural and planted pine forests.
Understanding Open-Vent Volcanism and Related Hazards
Author: William Ingersoll Rose
Publisher: Geological Society of America
ISBN: 0813724988
Category : Science
Languages : en
Pages : 248
Book Description
Special Paper 498 contains 12 new scientific papers, assembled as part of an NSF-sponsored workshop in 2011. The work highlights study of persistently active volcanoes and their hazards, mostly in Central America. Such volcanoes are termed "open vents" by volcanologists, and they offer the chance to study active processes. Insight into how volcanoes work and how hazards might be mitigated are the goals of the work. Overall, the volume presents insight into hazards infrastructure collaborations and development for geoscientists and students.
Publisher: Geological Society of America
ISBN: 0813724988
Category : Science
Languages : en
Pages : 248
Book Description
Special Paper 498 contains 12 new scientific papers, assembled as part of an NSF-sponsored workshop in 2011. The work highlights study of persistently active volcanoes and their hazards, mostly in Central America. Such volcanoes are termed "open vents" by volcanologists, and they offer the chance to study active processes. Insight into how volcanoes work and how hazards might be mitigated are the goals of the work. Overall, the volume presents insight into hazards infrastructure collaborations and development for geoscientists and students.
American Book Publishing Record
Author:
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 932
Book Description
Publisher:
ISBN:
Category : American literature
Languages : en
Pages : 932
Book Description
The British National Bibliography
Author: Arthur James Wells
Publisher:
ISBN:
Category : Bibliography, National
Languages : en
Pages : 1264
Book Description
Publisher:
ISBN:
Category : Bibliography, National
Languages : en
Pages : 1264
Book Description
A Guide to the Birds of Mexico and Northern Central America
Author: Steve N. G. Howell
Publisher: Oxford University Press
ISBN: 9780198540120
Category : Nature
Languages : en
Pages : 1024
Book Description
"A Guide to the Birds of Mexico and Northern Central America is astonishingly comprehensive, covering the identification, status, and distribution of all 1,070 birds species known from Mexico, Guatemala, Belize, El Salvador, Honduras, and western Nicaragua ... [T]he guide shows 750 species and includes many plumages never before depicted"--
Publisher: Oxford University Press
ISBN: 9780198540120
Category : Nature
Languages : en
Pages : 1024
Book Description
"A Guide to the Birds of Mexico and Northern Central America is astonishingly comprehensive, covering the identification, status, and distribution of all 1,070 birds species known from Mexico, Guatemala, Belize, El Salvador, Honduras, and western Nicaragua ... [T]he guide shows 750 species and includes many plumages never before depicted"--