By the beginning of the twenty-first century, few people could deny the reality of global change. But while most alarm has been over increasing temperatures, other changes are occurring in
precipitation patternsvariations that may be due in part to global warming but also to factors such as changes in atmospheric circulation and land surfaces.
The book is ideal for scientists, resource managers and students.
Great Plains Research
This volume provides a central
source of information about this newly emerging area of global change research. It presents ongoing investigations into the responses of plant communities and ecosystems to the experimental
manipulation of precipitation in a variety of field settingsparticularly in the western and central United States, where precipitation is already scarce or variable. By exploring methods that
can be used to predict responses of ecosystems to changes in precipitation regimes, it demonstrates new approaches to global change research and highlights the importance of precipitation regimes in
The contributors first document the importance of precipitation, soil characteristics, and soil moisture to plant life. They then focus on the roles of precipitation
amount, seasonality, and frequency in shaping varied terrestrial ecosystems: desert, sagebrush steppe, oak savanna, tall- and mixed-grass prairie, and eastern deciduous forest. These case studies
illustrate many complex, tightly woven, interactive relationships among precipitation, soils, and plantsrelationships that will dictate the responses of ecosystems to changes in precipitation
The approaches utilized in these chapters include spatial comparisons of vegetation structure and function across different ecosytems; analyses of changes in plant architecture and
physiology in response to temporal variation in precipitation; experiments to manipulate water availability; and modeling approaches that characterize the relationships between climate variables and
vegetation types. All seek to assess vegetation responses to major shifts in climate that appear to be occurring at present and may become the norm in the future.
As the first volume to discuss
and document current and cutting-edge concepts and approaches to research into changing precipitation regimes and terrestrial ecosystems, this book shows the importance of developing reliable
predictions of the precipitation changes that may occur with global warming. These studies clearly demonstrate that patterns of environmental variation and the nature of vegetation responses are
complex phenomena that are only beginning to be understood, and that these experimental approaches are critical for our understanding of future change.