Read e-book online A Natural History of the New World: The Ecology and PDF

By Alan Graham

ISBN-10: 0226306798

ISBN-13: 9780226306797

ISBN-10: 0226306801

ISBN-13: 9780226306803

The paleoecological heritage of the Americas is as complicated because the zone is wide: stretching from the Arctic Circle to Tierra del Fuego, the recent international gains the most remarkable plants in the world. yet in the past it has lacked a whole common historical past. Alan Graham treatments that with A average heritage of the hot global. With crops as his medical muse, Graham strains the evolution of ecosystems, starting within the past due Cretaceous interval (about a hundred million years in the past) and finishing within the current, charting their responses to adjustments in geology and weather.             through highlighting plant groups’ roles within the environmental heritage of the Americas, Graham deals an past due stability to normal histories that spotlight solely on animals. vegetation are very important in evolution’s most appropriate drama. not just are they conspicuous and very easily desk bound parts of the Earth’s ecosystems, yet their vast fossil list allows an intensive reconstruction of the planet’s paleoenvironments. What’s extra, vegetation supply oxygen, functionality as foodstuff and gas, and supply habitat and shield; briefly, theirs is a background that may communicate to many different components of evolution. A traditional background of the hot international is an bold and remarkable synthesis written by way of one of many world’s top students of botany and geology. 

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Additional resources for A Natural History of the New World: The Ecology and Evolution of Plants in the Americas

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These early wanderers were concerned primarily with food and survival; suitable lands for establishing colonies; and wealth, converts to Christianity, and slaves. The crew often included prisoners racked with contagious diseases and convicted of the most heinous crimes. They were unleashed fully armored, mounted on never-before-seen horses, and armed with guns capable of frightening and seemingly magical devastation. They were dangerous, and some were fanatically religious. As Tina Rosenberg notes in Children of Cain (1991), destruction of the early social structure and the subsequent history of the New World accounts in part for the attitudes of 20 Chapter Two many native peoples toward distant and centralized authority.

Large columnar cacti are a feature of the Sonoran Desert. The Chihuahuan Desert of southern New Mexico and west Texas is a plain between 400 m elevation along the Río Grande to 1500 m toward the south on the central Mexican Plateau. Precipitation is higher than in the Sonoran Desert (to 400 mm), temperatures are 5°C–10°C lower, and there is occasional winter frost. In addition to the widespread Acacia, Larrea, and Prosopis, there is Agave (Spanish bayonet, century plant), the source of henequen and tequila, and Yucca (Joshua tree).

15 Principal physiographic features of Mexico. 42 Chapter Two mostly low-lying, and often flooded land surfaces from the equatorial regions north to the Arctic and south to the Antarctic. In the Late Jurassic and Early Cretaceous a large fragment of land called the Maya, or Yucatán, block was located in the developing Gulf of Mexico (fig. 17). It was on one of the microplates that were moving to the southwest. It collided with southern Mexico in the Early Cretaceous and continued to slide to the southwest along a line marked by the Salina Cruz Fault running from Tehuantepec to the Gulf of Mexico.

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A Natural History of the New World: The Ecology and Evolution of Plants in the Americas by Alan Graham

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