Table 3 Dice indices for species dyads and results of randomisation tests (107 steps; described in the “Methods” section) testing the strengths of dyadic associations observed in the five networks.

From: Refining the stress gradient hypothesis for mixed species groups of African mammals

Network

Pair of species

Dice’s index

p-values, if preferences for habitat types are

Not considered

Considered

Inside lion home range

Zebra

Wildebeest

0.28

 < 0.001

0.001

Thomson’s gazelle

Grant’s gazelle

0.34

 < 0.001

0.001

Thomson’s gazelle

Giraffe

0.22

0.008

0.030

Giraffe

Eland

0.13

0.016

0.035

Wildebeest

Thomson’s gazelle

0.24

0.003

0.079

Wildebeest

Grant’s gazelle

0.17

0.046

0.351

Impala

Eland

0.11

0.029

0.080

Outside lion home range

Zebra

Wildebeest

0.26

 < 0.001

 < 0.001

Zebra

Eland

0.07

0.005

0.003

Impala

Waterbuck

0.10

0.004

 < 0.001

Thomson’s gazelle

Grant’s gazelle

0.40

 < 0.001

 < 0.001

Impala

Lesser kudu

0.07

0.007

0.104

Small NDVI

Zebra

Wildebeest

0.33

 < 0.001

 < 0.001

Zebra

Eland

0.10

0.028

0.011

Thomson’s gazelle

Grant’s gazelle

0.29

 < 0.001

 < 0.001

Medium NDVI

Zebra

Wildebeest

0.14

0.001

 < 0.001

Zebra

Waterbuck

0.05

0.015

0.003

Thomson’s gazelle

Grant’s gazelle

0.65

 < 0.001

 < 0.001

Large NDVI

Zebra

Wildebeest

0.31

 < 0.001

 < 0.001

Impala

Eland

0.11

0.009

0.019

Thomson’s gazelle

Grant’s gazelle

0.32

 < 0.001

0.003

Thomson’s gazelle

Giraffe

0.21

0.009

0.045

Wildebeest

Thomson’s gazelle

0.20

0.006

0.079

Wildebeest

Grant’s gazelle

0.18

0.024

0.385

Wildebeest

Giraffe

0.19

0.013

0.074

  1. In some cases, the significance of the association strength can be explained by preferences for the same habitat types (lines highlighted in italics). For each scenario, all dyadic associations between the ten most frequently encountered species (giraffe, eland, zebra, wildebeest, waterbuck, lesser kudu, Grant’s gazelle, impala, Thomson’s gazelle, Kirk’s dik–dik) were tested. Only dyads with significant values are shown.