Grant-Hoffman Et Al

1Grant-Hoffman et al.

ESM1. Islands studied during 2004 and 2005, ‘*’ indicates islands used for within-island analyses. ‘†’ indicates islands for which we did not have whole-island diversity. All islands are located off the North Island of New Zealand. Seabird densities are based on means of two to four 100m2 plots.

Distan Are ce Seabird Island Latitu Longitu a from Rat Rat density Island abbrevia de de (°E) (ha mainla History Status (burrows/10 tion (°S) ) nd 0m2) (km) Uninvad Uninvad *Ohinauiti OHI 36.71 175.88 5.9 5.3 3.5 ed ed Uninvad Uninvad *Aorangia AOA 35.48 174.71 5.6 21.4 11 ed ed Uninvad Uninvad *Ruamahauiti RTI 36.97 176.06 25.5 18.1 13 ed ed 107. Uninvad Uninvad *Aorangi AOI 35.48 174.72 20.6 17 1 ed ed *Ruamahaun Uninvad Uninvad RNI 36.95 176.09 32.4 19.9 18.5 ui ed ed 158. Uninvad Uninvad *†Tawhiti TR 35.45 174.71 21.7 24.5 Rahi 2 ed ed Uninvad Uninvad *Archway ARY 35.49 174.74 6.3 20.7 38 ed ed Uninvad Uninvad *Middle (Atiu) MID 36.6 175.84 13.5 8.3 68.5 ed ed Uninvad Uninvad Green GRN 34.64 175.85 2.5 7.2 101.5 ed ed Rattus Motukaramar MOA 36.68 175.37 10.1 3.3 norvegic Invaded 0 ama (Bush) us Rattus rattus or Motuoruhi MOI 36.73 175.4 58 2.6 R. Invaded 0 norvegic us Rattus rattus eradicat Motutapere MOE 36.78 175.4 45.6 2.5 Invaded 0 ed 1996, reinvade d Rattus rattus or Pakihi PAK 36.54 175.1 110 1.4 R. Invaded 0 (McCallum) norvegic us Rattus Rakitu (Arid) RAK 36.07 175.3 350 37.6 Invaded 0 rattus Rattus Aiguilles AIG 36.03 175.39 72.7 47.7 Invaded 0.5 rattus Rattus Goat GOT 36.26 174.8 13.4 0.015 Invaded 0.5 rattus

2 3Grant-Hoffman et al.

Rattus rattus or *Motueka MOK 36.82 175.8 6.2 1.2 R. Invaded 4 norvegic us Rattus norvegic us eradicat Manage TH 36.51 174.74 6 10.5 0.25 †Te Haupa ed 1989, d Mus musculu s Rattus norvegic us eradicat Manage HAU 37.21 175.89 10.3 0.5 1 †Hauturu ed 1985, d Mus musculu s Rattus norvegic *Motuhoropa us Manage MOP 36.41 174.57 8.6 17.9 2 pa erradicat d ed 1987, 1991 Rattus norvegic us Manage *Otata OTA 36.41 174.58 15 17.5 7 erradicat d ed 1987, 1991 Rattus norvegic Manage *Whenuakura WHE 37.22 175.89 3 0.9 us 15.25 d eradicat ed 1985