Table 1. Results of model selection relating landscape complexity and enemy exclusion to response variables.

Model lists show the 95% best models at the most predictive scale for each response variable. The sum of weights for each term is the sum of AIC weights of all models selecting it and represents the probability of being present in the 95% model confidence set.

Response	no	Model specification									df	AICc	Δ AIC	w	w 95%
Aphid population growth ∼	M1	M +	L +	D +	T +	M:D +	L:D +	T:D +	L:T +	L:T:D	52	−3,480	0	0.94	1
Sum of weights		1	1	1	1	1	1	1	1	1				0.94	1
Parasitism rate ∼	M2	M +	L +	D +	T +	M:D +	L:D +		L:T		23	1486.8	0.00	0.71	0.75
	M3	M +	L +	D +	T +	M:D +			L:T		21	1491.6	4.87	0.06	0.07
	M4		L +	D +	T +		L:D +		L:T		20	1491.8	5.03	0.06	0.06
	M5	M +	L +	D +	T +		L:D +		L:T		21	1492.1	5.34	0.05	0.05
	M6	M +	L +	D +	T +	M:D +	L:D +	T:D +	L:T		33	1492.8	6.03	0.04	0.04
	M7	M +	L +	D +	T +	M:D +	L:D				18	1493	6.26	0.03	0.03
Sum of weights		0.94	1	1	1	0.89	0.14	0.04	0.97					0.95	1.00
Syrphid fraction ∼	M8	M +	L +	D +	T +				L:T		19	1229.6	0.00	0.23	0.25
	M9		L +	D +	T +				L:T		18	1,230	0.35	0.20	0.21
	M10	M +	L +	D +	T +	M:D +			L:T		21	1230.2	0.58	0.18	0.19
	M11	M +	L +	D +	T +	M:D +	L:D +		L:T		23	1232.1	2.47	0.07	0.07
	M12	M +		D +	T +	M:D					15	1232.4	2.78	0.06	0.06
	M13	M +		D +	T +						13	1232.5	2.82	0.06	0.06
	M14	M +	L +	D +	T +		L:D +		L:T		21	1233	3.36	0.04	0.05
	M15		L +	D +	T +		L:D +		L:T		20	1233.2	3.58	0.04	0.04
	M16			D +	T +						12	1233.3	3.65	0.04	0.04
	M17	M +	L +	D +	T +	M:D					16	1234.3	4.67	0.02	0.02
Sum of weights		0.71	0.84	1	1	0.35	0.16		0.81					0.93	1.00

Notes.

Selected explanatory variables are

M

management type of the nearest surrounding field (organic/conventional)

L

landscape complexity (% seminatural habitat in the surrounding radius)

D

sampling date (1–3)

T

Exclusion treatment (6 levels of natural enemy exclusion)

w

AIC weight compared to all possible models

w95%

AIC weight within the 95% model confidence set