Table 1 Growth ring statistics for Polylepis rugulosa and P. tarapacana in Peruvian Andean puna mountain forests.

Number of individuals analyzed

30

31

Master series^a

1897–2015 (119 yrs)

1774–2015 (242 yrs)

Series intercorrelation^a

0.414

0.614

Number of intercorrelations^b

1770

1891

Average mean sensitivity^a

0.357

0.307

Mean EPS^b

0.916*

0.949*

Mean R-bar^b

0.282

0.473

Signal to-noise-ratio (SNR)^b

7.731

12.788