Table 1 Relative importance of different interaction properties on recipient population sensitivity to the insecticide treatment (a, I vs. C), the herbicide treatment (b, H vs. C), and the insecticide + herbicide treatment (c, I + H vs. C)
(a) I vs. C | |||
---|---|---|---|
likelihood ratio χ2 | df | P | |
Mean interaction strength | 0.28 | 1 | 0.59 |
Interaction temporal variability | 26.78 | 1 | <0.001 |
Interaction density-dependence (IDD) | 0.35 | 1 | 0.55 |
Direction of IDD (negative or positive) | 0.03 | 1 | 0.86 |
IDD × direction of IDD | 0.41 | 1 | 0.52 |
Recipient function | 2.88 | 2 | 0.24 |
(b) H vs. C | |||
---|---|---|---|
likelihood ratio χ2 | df | P | |
Mean interaction strength | 0.25 | 1 | 0.62 |
Interaction temporal variability | 7.62 | 1 | 0.01 |
Interaction density-dependence (IDD) | 0.68 | 1 | 0.41 |
Direction of IDD (negative or positive) | 0.07 | 1 | 0.8 |
IDD × direction of IDD | 1.06 | 1 | 0.3 |
Recipient function | 1.23 | 2 | 0.54 |
(c) I + H vs. C | |||
---|---|---|---|
likelihood ratio χ2 | df | P | |
Mean interaction strength | 0.01 | 1 | 0.92 |
Interaction temporal variability | 21.9 | 1 | <0.001 |
Interaction density-dependence (IDD) | 1.61 | 1 | 0.21 |
Direction of IDD (negative or positive) | 0.12 | 1 | 0.73 |
IDD × direction of IDD | 7.5 | 1 | 0.01 |
Recipient function | 9.96 | 2 | 0.01 |