Fig. 4From: Contradictions and continuities: a historical context to Euro-American settlement era fires of the Lake States, USADecadal fire indices for sites (n = 25) composited by region (n = 8). Slopes are linear regression lines for the period of first recorded fires to 1930. Only the Bluff & Coulee (B&C) and Central Sands (CS) regions had slopes significantly different than would be expected by chance (P < 0.001)Back to article page