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Books > Science & Mathematics > Biology, life sciences > Microbiology (non-medical)
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Microbial Life in the Cryosphere and Its Feedback on Global Change (Hardcover)
Loot Price: R3,682
Discovery Miles 36 820
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Microbial Life in the Cryosphere and Its Feedback on Global Change (Hardcover)
Series: Life in Extreme Environments
Expected to ship within 12 - 17 working days
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The cryosphere stands for environments where water appears in a
frozen form. It includes permafrost, glaciers, ice sheets, and sea
ice and is currently more affected by Global Change than most other
regions of the Earth. In the cryosphere, limited water availability
and subzero temperatures cause extreme conditions for all kind of
life which microorganisms can cope with extremely well. The
cryosphere's microbiota displays an unexpectedly large genetic
potential, and taxonomic as well as functional diversity which,
however, we still only begin to map. Also, microbial communities
influence reaction patterns of the cryosphere towards Global
Change. Altered patterns of seasonal temperature fluctuations and
precipitation are expected in the Arctic and will affect the
microbial turnover of soil organic matter (SOM). Activation of
nutrients by thawing and increased active layer thickness as well
as erosion renders nutrient stocks accessible to microbial
activities. Also, glacier melt and retreat stimulate microbial life
in turn influencing albedo and surface temperatures. In this
context, the functional resilience of microbial communities in the
cryosphere is of major interest. Particularly important is the
ability of microorganisms and microbial communities to respond to
changes in their surroundings by intracellular regulation and
population shifts within functional niches, respectively. Research
on microbial life exposed to permanent freeze or seasonal
freeze-thaw cycles has led to astonishing findings about microbial
versatility, adaptation, and diversity. Microorganisms thrive in
cold habitats and new sequencing techniques have produced large
amounts of genomic, metagenomic, and metatranscriptomic data that
allow insights into the fascinating microbial ecology and
physiology at low and subzero temperatures. Moreover, some of the
frozen ecosystems such as permafrost constitute major global carbon
and nitrogen storages, but can also act as sources of the
greenhouse gases methane and nitrous oxide. In this book we
summarize state of the art knowledge on whether environmental
changes are met by a flexible microbial community retaining its
function, or if the altered conditions also render the community in
a state of altered properties that affect the Earth's element
cycles and climate. This book brings together research on the
cryosphere's microbiota including permafrost, glaciers, and sea ice
in Arctic and Antarctic regions. Different spatial scales and
levels of complexity are considered, spanning from ecosystem level
to pure culture studies of model microbes in the laboratory. It
aims to attract a wide range of parties with interest in the effect
of climate change and/or low temperatures on microbial nutrient
cycling and physiology.
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