Jake F. Weltzin and Guy R. McPherson. 2000. Implications of precipitation redistribution for shifts in temperate savanna ecotones. Ecology 81:1902-1913.
Appendix A: Photograph of the experimental system for capturing and redistributing precipitation at the woodland/grassland ecotone in southeastern Arizona.
Ecological Archives E081-020-A1.
Appendix. Figure 1. Experimental system for capturing and redistributing precipitation at the woodland/grassland ecotone in southeastern Arizona. Precipitation shelters (16 m x 4 m; n = 4) were covered with clear polyethylene film to exclude ambient precipitation from experimental plots. Gutters routed ambient precipitation to storage tanks. Collected precipitation was applied to plots according to a protocol designed to simulate natural precipitation patterns. Each shelter contained 5, 1.2 m by 1.5 m plots arranged linearly at 1.5 m spacing. The perimeter of each plot was trenched to 1 m depth and lined with polyethylene film to prevent lateral movement of soil water. The edge of each plot was bordered to prevent lateral movement of surface water. Vegetation and soil in each plot was left intact.
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