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Permafrost Soils

Produktform: Buch / Einband - fest (Hardcover)

Most of the Earth’s biosphere is characterized by low temperatures. Vast areas (20%) of the soil ecosystem are permanently frozen or are unfrozen for only a few weeks in summer. Permafrost regions occur at high latitudes and also at high ele- tions; a significant part of the global permafrost area is represented by mountains. Permafrost soils are of global interest, since a significant increase in temperature is predicted for polar regions. Global warming will have a great impact on these soils, especially in northern regions, since they contain large amounts of organic carbon and act as carbon sinks, and a temperature increase will result in a release of carbon into the atmosphere. Additionally, the intensified release of the clima- relevant tracer gas methane represents a potential environmental harzard. Significant numbers of viable microorganisms, including bacteria, archaea, p- totrophic cyanobacteria and green algae, fungi and protozoa, are present in per- frost, and the characteristics of these microorganisms reflect the unique and extreme conditions of the permafrost environment. Remarkably, these microorg- isms have been reported to be metabolically active at subzero temperatures, even down to ?20°C.weiterlesen

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Sprache(n): Englisch

ISBN: 978-3-540-69370-3 / 978-3540693703 / 9783540693703

Verlag: Springer Berlin

Erscheinungsdatum: 04.11.2008

Seiten: 348

Auflage: 1

Zielgruppe: Research

Herausgegeben von Rosa Margesin

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