دانلود کتاب Tundra

The geography and geology of tundra habitats have many physical and climatic constraints. Yet while biodiversity is low, ecosystems still exist in this environment. Much of the megafauna that we are familiar with - such as wooly mammoths and giant elk - inhabited tundra environments, and much of what we know of early human activity took place in this harsh ecosystem. "Tundra" presents a thorough overview of the tundra habitat - past, present, and future. Unique qualities of life, such as slow-growing dwarf trees and animals exhibiting large bodies and small ears, are described and discussed in the context of adaptation and survival strategy. The history and prehistory of tundra are also explored. Past and present exploitation of tundra ecosystems is diverse. There is abundant mineral, gas, and oil wealth in these areas, and ecotourism and winter sports are abundant. As use of tundra ecosystems expands, problems connected with climate change, waste disposal, and other threats to the ecosystem must be addressed. "Tundra" examines these issues and more, in an easy-to-use format perfect for any science library or classroom.