Desertification has occurred worldwide. The biophysical and
socio-economic complexity of this phenomenon has challenged our ability
to categorize, inventory, monitor and repair the condition of degraded
lands. One of the most important distinctions to be made in relation to
land degradation is between cultivated land used for annual crop
production and `rangelands'. Grazing by free-roaming livestock is the
traditional primary use of the world's rangelands. However, there is
growing recognition of the importance of these vast acreages for
wildlife habitat, hydrology and ground water recharge, recreation and
aesthetics.
This text focuses on the desertification of rangelands and explores
processes, problems and solutions. Chapters in the first section
evaluate interactions between `natural' and human-induced disturbance
regimes, thresholds, and non-linear change with respect to vegetation,
hydrology, nutrients and erosion. Chapters in the second section examine
socio-economic constraints and approaches for preventing and reversing
degradation.
The book provides a contemporary, process-oriented perspective on
rangeland degradation of value to students, policy-makers and
professionals alike.