Figure 2: The rain-fed maize agricultural niche through time.
From: A 2,000-year reconstruction of the rain-fed maize agricultural niche in the US Southwest
Each year is represented by the cumulative proportion of the landscape at different values, represented by colour gradients defined in the right margin. The colour gradient of each panel breaks at the extent of that signal’s agricultural niche. The thick solid line in each panel is a 21-year running mean of the estimated proportion in each niche; the thin solid lines are the upper and lower prediction intervals (see Methods); the dashed line is the mean estimated proportion in the niche over the entire reconstruction. (a) VEPIIN net water-year precipitation, green portion in niche. (b) VEPIIN growing-season growing degree days (GDDs), red portion in niche. (c) VEPIIN rain-fed maize agricultural niche, light green in niche upper PI, medium green in niche estimate, dark green in niche lower PI. (d–f) The same as a–c for the VEPIIS study area.
