Table 1.

Acoustic indices as predictors of scores of the first axis of ordination of vertebrate communities, the richness of vertebrates per plot, only vertebrates observed in old-growth plots, and the scores of the first axis of an ordination from light trapping insect communities using a multiple linear regression model (see “Methods“ for explanations of acoustic index calculation)

	Response variables
	Vertebrate community axis 1		Vertebrate richness		Vertebrate old-growth richness		Nocturnal insect communities axis 1
Adjusted R²	0.62		0.20		0.45		0.42
Acoustic indices (predictor variables)	Est. ± SE	t-val.	Est. ± SE	t-val.	Est. ± SE	t-val.	Est. ± SE	t-val.
Temporal entropy	3.7 ± 2.2	1.66	−2.4 ± 1.8	−1.37	0.3 ± 1.7	0.19	0.0 ± 1.2	0.01
Acoustic complexity	−23.7 ± 8.0	−2.95	9.8 ± 6.5	1.51	-14.3 ± 6.1	−2.36	−5.2 ± 4.4	−1.18
Entropy of frequency	3.7 ± 1.3	2.94	−0.8 ± 1.0	−0.74	2.0 ± 1.0	2.09	1.5 ± 0.7	2.11
Soundscape saturation	3.2 ± 0.7	4.54	−1.6 ± 0.6	−2.90	0.9 ± 0.5	1.78	1.2 ± 0.4	3.06
Events/Second	−0.8 ± 0.2	−3.62	0.3 ± 0.2	2.04	-0.3 ± 0.2	−1.69	−0.3 ± 0.1	2.33

Richness values were log-transformed and modelled with the same linear models to make adj. R² comparable. Estimates, standard errors and t-value are shown; bold t-values indicate significant predictors (p < 0.05). For spatial independence of all model residuals see Supplementary material.