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Table 2 SADIE aggregation indices and associated p levels for the various combinations of earthworm assemblages identified in the three axes extracted from the CA

From: Dissecting the multi-scale spatial relationship of earthworm assemblages with soil environmental variability

Species assemblages

I a

v i(patch)

v j(gap)

New genus 1

0.997 NS

0.871 NS

−1.003 NS

Rest of species

1.018 NS

0.944 NS

−1.015 NS

Endogecis

1.414 *

1.485 **

−1.430 *

Epigeics + Anecic

1.011 NS

1.188 NS

−1.061 NS

Andiodrilus, Aymara and new genus 1

1.222 NS

1.343 *

−1.222 NS

Martiodrilus, Glossodrilus and new genus 2

1.453 *

1.320*

−1.428 *

  1. Ia = global index of aggregation; vj = mean negative index value (gap); vi = mean positive index value (patch). Departure from randomness is tested using 5,967 permutations. * p < 0.05; ** p < 0.01; NS, not significant.