Now showing items 1-4 of 4

  • Biotic and abiotic changes in ecosystem structure over a shrub-encroachment gradient in the southwestern USA. 

    Turnbull, Laura; Brazier, Richard E.; Wainwright, John; Bol, Roland (Springer Verlag, 2010)
    In this study, we investigate changes in ecosystem structure that occur over a gradient of land-degradation in the southwestern USA, where shrubs are encroaching into native grassland. We evaluate a conceptual model which ...
  • Changes in hydrology and erosion over a transition from grassland to shrubland 

    Turnbull, Laura; Wainwright, John; Brazier, Richard E. (Wiley-Blackwell, 2010-02-15)
    The degradation of grasslands is a common problem across semi-arid areas worldwide. Over the last 150 years, much of the south-western United States has experienced significant land degradation, with desert grasslands ...
  • Spatial patterns of scour and fill in dryland sand bed streams 

    Powell, D. Mark; Brazier, Richard E.; Wainwright, John; Parsons, Anthony; Nichols, Mary (American Geophysical Union, 2006-08)
    Spatial patterns of scour and fill in two dryland ephemeral stream channels with sandy bed material have been measured with dense arrays of scour chains. Although the depth and areal extent of bed activity increased with ...
  • Streambed scour and fill in low‐order dryland channels 

    Powell, D. Mark; Brazier, Richard E.; Wainwright, John; Parsons, Anthony; Kaduk, Jörg (American Geophysical Union, 2005-05)
    Distributions of scour and fill depths recorded in three low‐order sand bed dryland rivers were compared with the Weibull, gamma, exponential, and lognormal probability density functions to determine which model best ...