Table 2 Pairwise Pearson’s correlation coefficients.

From: Legacies of Indigenous land use shaped past wildfire regimes in the Basin-Plateau Region, USA

Pearson’s correlation

Charcoal influx

Population density

AP : NAP

PDSI

ENSO

Charcoal influx

1

-

-

-

-

Population density

0.88

1

-

-

-

AP : NAP

−0.62

−0.65

1

-

-

PDSI

0.12

0.05

0.07

1

-

ENSO

−0.63

−0.62

0.37

0.005

1

  1. Pairwise Pearson’s correlation coefficients demonstrating a positive correlation between fire activity and population density, a negative correlation between fire activity and the ratio of arboreal to non-arboreal pollen (AP : NAP), and negligible relationships between fire activity, climate (i.e., drought (PDSI), and ENSO), and arboreal to non-arboreal pollen (AP : NAP).
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