Fig. 4From: Crop diversity loss as primary cause of grey partridge and common pheasant decline in Lower Saxony, GermanyMinimum adequate habitat model of grey partridge breeding pairs. Figure displays results of GAMM showing significant smoothers: a winter grain (%) agricultural land, b mean field block size, c Shannon Index, d % forest/municipal area, e % open water/municipal area, f longitude × latitude. R2 adjusted = 0.48Back to article page