Challenges and Opportunities for Conserving Faunal Biodiversity in Arid Ecosystems

Abstract

Increasing competition for limited sources of water and primary productivity in arid and semi-arid landscapes poses substantial challenges for conserving the distinctive faunal biodiversity of these ecosystems. Natural climatic severity, human population growth, and anthropogenic climate change constrain opportunities for ecological restoratil?n and rehabilitation. Nonetheless, although it may not be possible to restore systems to a historical or undisturbed state, existing management frameworks can be used to develop efficient strategies for faunal conservation with a high probability of success. We outline the threats to faunal biodiversity in arid ecosystems from climate change, agriculture (cultivation of crops and livestock grazing), modification of fire regimes, non-native invasive species, and localized urbanization. We also examine practical alternatives for addressing those threats. In particular, an integrated approach to valuation of environmental assets that incorporates both socio-economics and ecology is likely to gain community support and provide a realistic foundation for effective adaptive management. We describe how the approach has been implemented for riparian systems in Victoria, Australia, and explore how it can be generalized to conserve faunal biodiversity of arid zones world-.yide.