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The rise in the concentration of CO2 in the atmosphere since the
start of industrialization, and the global warming associated with
this greenhouse gas, has stimulated research into the response of
plants to elevated levels of CO2. Much of this work has been
carried out in controlled environments which provide limited
information about long-term effects on vegetation. In contrast,
CO2-emitting mineral springs provide a unique opportunity to
consider vegetation which has endured over many generations at
naturally elevated levels of CO2. This volume presents findings
from a range of sites, confirming the potential of these natural
laboratories in the investigation of this important aspect of
climate change.
The prospect of future climate change has stimulated research into
the physiological responses of plants to stress. Water is a key
factor controlling the distribution and abundance of plants in
nature and the efficient uptake and subsequent transport of water
within the plant is critical in hot, dry regions. This book, based
on a meeting which focused on the failure of the hydraulic pathway
within the xylem, brings together contributions from a range of
experts who have worked on the cavitation of water in the transport
system. The phenomenon of cavitation, discovered only in the 1960s,
is now becoming recognised as being widespread and, whilst its
ecological significance is a matter for further research, many
scientists consider than embolism in the xylem predisposes plants
to further water stress. Cavitation and refilling may, therefore,
hold the key to vegetational response to climatic warming and
drying. This book will provide a valuable compendium of information
for those working in the plant and environmental sciences as well
as for those whose interests lie in the more applied disciplines of
agriculture and forestry.
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