Desertification and climate change--the Australian perspective

Abstract

CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 11:51-63 (1998) - doi:10.3354/cr011051 Desertification and climate change--the Australian perspective G. Pickup* CSIRO Land and Water, PO Box 1666, Canberra, ACT 2601, Australia *E-mail: geoff.pickup@cbr.clw.csiro.au ABSTRACT: In Australia, desertification tends to be associated with land degradation in the rangelands. It results from unsustainable land use and the impact of European settlement, rather than changing climate. Desertification can, however, be exacerbated or triggered by climate variability. Some of the degradation occurred in the early stages of pastoral development but the problem has continued. The extent of degradation has proved difficult to assess but survey results show it varies in severity across the country. Grazed rangelands have been most severely affected but the problem extends outside the pastoral zone due to the impact of feral animals and changed fire regimes. Biodiversity has also been affected with extinctions occurring among small and medium-sized mammals. Climate change scenarios suggest shifts in rainfall patterns but the major impact will come through increased variability. Substantial shifts in rainfall have occurred over the last 100 yr with wetter periods generating unrealistic expectations about land use and drier periods triggering land degradation. However, pastoral management is focused on short term climatic variability since this is what dominates both production and income. Policy responses require that the whole issue of sustainable land use be addressed rather than climate issues alone. KEY WORDS: Desertification · Land degradation · Australia · Climate change · Climate variability · Rangelands · Pastoralism · Biodiversity Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 11, No. 1. Online publication date: December 17, 1998 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 1998 Inter-Research.