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Fire Ecology
Fig. 6 | Fire Ecology

Fig. 6

From: Contradictions and continuities: a historical context to Euro-American settlement era fires of the Lake States, USA

Fig. 6

Results of superposed epoch analysis (SEA) of the average Palmer Drought Severity Index (PDSI) across the region (Cook et al. 2007) for years prior and subsequent to fire event years (year 0) for a notable historical accounts of settlement era fires (i.e., Table 4) and b ≥ 15% average rate of scarring (minimum 10 recording trees) across all ecological landscapes. Positive PDSI values indicate wet conditions, negative values represent dry conditions. Solid bars indicate PDSI values outside a 95% confidence interval based on 1000 Monte Carlo simulations of random distributions of annual PDSI (a 1850–1950, b 1600–2000)

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