Abstract
Climate change is expected to increase the intensity and temporal variability of storm events in many areas while reducing their frequency, resulting in increased runoff, and drought frequency and severity. Soil degradation can exacerbate these impacts by reducing both infiltration and plant-available water holding capacity. Therefore, an understanding of soil resistance and resilience to degradation is necessary to target climate change adaptation investments where they will have the largest impact. This paper (1) reviews key concepts necessary to understand the dynamic relationships between climate change adaptation, soil resistance and resilience, and social stability, and (2) provides a strategy for maximizing return on climate change adaptation investments in drylands based on an understanding of soil and ecosystem resilience. The strategy includes seven steps, which are completed for each landscape unit in the context of the surrounding landscape: (1) Determine current potential productivity based on soils, topography, and existing climate conditions. (2) Determine future potential productivity based on soil, topography, and climate change scenarios. (3) Rank landscape units based on predicted change in potential productivity. (4) Determine risk of land use change. (5) Determine degradation risk with and without land use change. (6) Rank each landscape unit based on degradation risk with and without land use change. (7) Determine priorities for climate change and soil conservation investments. The strategy described here can be applied on multiple scales to address a wide variety of objectives. We conclude by suggesting that climate change adaptation resources allocation decisions include consideration of soil resistance and resilience.
Attention must be given to ensuring high productivity from stable soils, restoring and sustaining the productivity of resilient soils, and conserving fragile and marginal soils.
(Greenland et al. 1994)
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Notes
- 1.
This paper provides a strategy for increasing returns on climate change investments by considering the potential impact of each of these risks on sustainability.
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Acknowledgements
We are grateful to a large number of colleagues around the world with whom we have discussed these issues. This paper benefited particularly from conversations with Kevin Urama. We also thank Kara Shervanick for manuscript preparation assistance and editing, and David Hansen and an anonymous reviewer for their very helpful comments and suggestions.
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Herrick, J.E., Beh, A. (2015). A Risk-Based Strategy for Climate Change Adaptation in Dryland Systems Based on an Understanding of Potential Production, Soil Resistance and Resilience, and Social Stability. In: Lal, R., Singh, B., Mwaseba, D., Kraybill, D., Hansen, D., Eik, L. (eds) Sustainable Intensification to Advance Food Security and Enhance Climate Resilience in Africa. Springer, Cham. https://doi.org/10.1007/978-3-319-09360-4_22
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