Table 1 Pearson’s correlation coefficients (r) for covariates.

From: Indigenous impacts on north Australian savanna fire regimes over the Holocene

Covariate

Covariate

Early to mid (> 3kyr BP)

Late (< 3 kyr BP)

δDwax

δ13CSPAC

0.74, P = 0.006**

− 0.17, P = 0.687

MARSPAC

0.68, P = 0.015*

0.00, P = 1

fGrass

0.71, P = 0.010**

− 0.26, P = 0.534

CHAR

− 0.69, P = 0.013*

− 0.60, P = 0.116

δ13CSPAC

MARSPAC

0.55, P = 0.002**

− 0.90, P < 0.001**

fGrass

0.78, P = 0.009**

− 0.67, P = 0.002**

CHAR

− 0.66, P = 0.002**

− 0.47, P = 0.049*

MARSPAC

fGrass

0.42, P = 0.093

0.57, P = 0.011*

CHAR

0.24, P = 0.322

0.49, P = 0.033*

fGrass

CHAR

− 0.62, P = 0.008**

0.68, P = 0.002**

  1. **Indicates significance at 0.01, *indicates significance at 0.05. δDwax is the average δD value of n-C27 and n-C29 n-alkane, fGrass is the fraction of terrestrial grass that is Poaceae, CHAR is the charcoal particle flux, and MARSPAC indicates Stable Polyclyclic Aromatic Carbon (see text for details).
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