Abundance of four focal arthropod groups at 8 pairs of sites with (I) and without (U) the Argentine ant sitenumber invstatus Nants Nspiders Nbarklice Nbeetles 1 I 32 30 129 19 2 I 3 49 161 15 3 I 1 52 47 24 4 I 5 26 50 24 5 I 29 58 136 31 6 I 129 49 167 11 7 I 69 68 238 24 8 I 28 42 277 40 1 U 98 57 130 20 2 U 56 47 160 18 3 U 79 79 214 17 4 U 63 52 98 44 5 U 213 78 71 52 6 U 460 24 22 20 7 U 186 68 34 23 8 U 114 21 41 20