Fig. 3: Relationships between fire and vegetation indices at Girraween lagoon.
From: Late Pleistocene emergence of an anthropogenic fire regime in Australia’s tropical savannahs
a, Relationship between MARSPAC and PARCHAR. We hypothesized a more pronounced positive relationship under the pre-human natural fire regime than under the lower-intensity fires present in the anthropogenic fire regime. b, Relationship between the percentage of C4 pollen and δ13CSPAC. We hypothesized a more pronounced positive relationship under the lower-intensity fires present in the anthropogenic fire regime than under the pre-human natural fire regime. In both cases, the relationships pertain only to periods where the TOC is >5.1%, and the hypothesized temporal split between the natural and anthropogenic periods is 30 ka. Red dashed lines indicate the best-fit relationships with uncertainty for periods dominated by a natural fire regime, and solid blue lines indicate best-fit relationships with uncertainty during periods dominated by anthropogenic fire regimes. We provide the relationship for all samples in Supplementary Fig. 1.
