Table 4. Results from SIMPER analyses, listing the six most important GDA species according to its contribution to the dissimilarity within each biome during the two collection periods (spring [pre-monsoon], summer [monsoon]).

Capital letters preceding species names indicate to which major arthropod group the species belongs (C-Coleoptera, A- Araneae, O-Orthoptera, M-Myriapoda).

Biome/ Species	No. Per Trap		% Contribution
	Spring	Summer	Dissimilarity
Desertscrub
C Triorophus laevis	4.34	0.00	11.97
C Steriphanus subopacus	0.72	0.00	5.61
C Microlestes linearis	0.12	0.86	4.64
A Syspira longipes	0.48	0.04	4.49
A Callilepis gertschi	0.30	0.00	4.18
			30.89
Grassland
C Eusattus reticulatus	0.00	1.25	6.02
C Agroporis costipennis	0.85	0.09	4.80
C Pasimachus californicus	0.00	0.54	4.42
O Gryllus spp.	0.48	0.29	3.98
C Microlestes linearis	0.07	0.43	3.09
			22.31
Chaparral
C Onthophagus sp.	0.00	1.21	6.91
C Opatrinae spp.	0.00	0.40	5.33
A Callilepis gertschi	0.31	0.00	4.51
C Eleodes spp.	0.31	0.03	4.32
O Gryllus spp.	0.26	0.43	4.16
			25.23
Pine/Oak
C Serica sp.	0.76	0.00	7.43
C Euparea sp.	0.00	1.55	7.05
O Gryllus spp.	0.36	0.46	5.08
A Callilepis eremella	0.29	0.00	4.81
C Stelidota geminata	0.00	0.46	4.63
			29.00
Pine
C Euparea sp.	0.00	3.59	9.71
A Alopecosa kochi	0.46	0.03	5.76
C Synuchus dubius	0.00	0.36	4.64
C Serica sp.	0.72	0.00	4.21
A Pardosa montgomeryi	0.00	0.36	4.09
			28.41
Mixed Conifer
M Aniulus sp.1	0.10	3.12	8.35
C Euparea sp.	0.00	1.74	6.85
C Synuchus dubius	0.00	0.97	5.99
M Lithobiid sp.3	0.03	0.59	4.12
O Ceuthophilus spp.	0.32	0.00	3.98
			29.29