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Ecosystems, Evolution, and Ultraviolet Radiation (Paperback, Softcover reprint of hardcover 1st ed. 2001)
Loot Price: R2,843
Discovery Miles 28 430
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Ecosystems, Evolution, and Ultraviolet Radiation (Paperback, Softcover reprint of hardcover 1st ed. 2001)
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This book discusses UV radiation, its effects on ecosystems and the
likely evolutionary consequences of changed UV radiation
environments, past, present and future. The first two chapters
examine the history of the UV radiation climate of earth and the
factors that determine organismal and ecosystem exposure. Their
purpose is to give the reader a physical perspective on UV
radiation and an understanding of the constantly changing UV
environment that ecosystems are exposed to over time. Variations in
the UV radiation environment occur at the local level (such as
boundary layer and plant canopy effects) through to global-scale
changes (such as alterations in the column abundance of UV-B
protecting ozone). UV radiation regimes also vary over temporal
scales. These alterations occur on time scales of seconds (the
movement of clouds and plant canopies) to literally billions of
years (gross long-term changes in the composition of the Earth's
atmosphere). In the chapters that follow five specific biological
and ecological topics in photobiology are considered. They are
effects of UV radiation on amphibians, plants, corals, aquatic
microbial ecosystems and Antarctic ecosystems that are exposed to
the anthropogenically generated ozone 'hole'. These chapters
consider UV radiation effects at a diversity of levels from the
biochemical to the community. Their purpose is to provide the
reader with our current understanding of the ecological effects of
UV radiation, the areas where questions still remain and to provide
a perspective from which the reader can better understand questions
in evolutionary photobiology. The final chapter investigates the
biological consequences of altered extraterrestrial ultraviolet
fluxes, which are quite different from those experienced on the
Earth. Our knowledge of the role of UV radiation in shaping
ecologies and evolutionary change is still in its infancy. This
book brings together a number of authors with the aim of helping to
consolidate a better understanding of this interesting area of
photobiology.
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