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Books > Science & Mathematics > Biology, life sciences > Microbiology (non-medical)
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Permafrost Soils (Hardcover, 2009 ed.)
Loot Price: R4,626
Discovery Miles 46 260
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Permafrost Soils (Hardcover, 2009 ed.)
Series: Soil Biology, 16
Expected to ship within 10 - 15 working days
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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
DegreesC.
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