Kuo et al. Bird Species Migration Ratio

Supplementary materials

NAWI-D-13-00113

Table S1 AIC summary for full and reduced generalized linear models for the avian migration ratio of continental East Asia (the Asian continent east of 70°E)(3345 grid cells) and Australia (851 grid cells).

Table S2 AIC summary for full and reduced generalized linear models for the avian migration ratio of islands from 70°E to 180°E(677 grid cells).

Fig.S3The annual range in ambient temperature (°C), the Enhanced Vegetation Index, and precipitation (mm) from East Asia to New Zealand.

Data S4Sources for the avian database of distribution rangesof breeding and non-breeding distribution ranges of 3,545 terrestrial species that breed between70°E to 180°E.

Table S1 AIC summary for full and reduced generalized linear models for the avian migration ratio of continental East Asia (the Asian continent east of 70°E) and Australia. The criterion for model selection (ΔAIC) was computed with the full dataset (n = 4873 grid cells). AIC = Akaike Information Criterion; ΔAIC = AIC difference between full and reduced models; Akaike weight = relative likelihood of model; TEM, EVI, and PRE = annual range of ambient temperature (°C), the Enhanced Vegetation Index, and precipitation (mm), respectively; ELE = elevational range (m).

Continental East Asia / Australia
Explanatory variables / ΔAIC / AIC / Akaike weight / ΔAIC / AIC / Akaike weight
TEM + EVI + PRE + ELE / 0 / 2602 / 0.99 / 0 / 2174 / 1.00
TEM + EVI + PRE / 10 / 2612 / 0.01 / 80 / 2254 / < 0.001
TEM + EVI + ELE / 197 / 2799 / < 0.001 / 12 / 2186 / < 0.001
TEM + PRE + ELE / 992 / 3594 / < 0.001 / 63 / 2237 / < 0.001
EVI + PRE + ELE / 2768 / 5370 / < 0.001 / 16 / 2190 / < 0.001
TEM + EVI / 205 / 2807 / < 0.001 / 92 / 2266 / < 0.001
TEM + ELE / 990 / 3592 / < 0.001 / 62 / 2236 / < 0.001
TEM + PRE / 990 / 3592 / < 0.001 / 164 / 2338 / < 0.001
EVI + PRE / 2766 / 5368 / < 0.001 / 87 / 2261 / < 0.001
PRE + ELE / 4809 / 7411 / < 0.001 / 93 / 2267 / < 0.001
EVI + ELE / 5985 / 8587 / < 0.001 / 186 / 2360 / < 0.001
TEM / 989 / 3591 / < 0.001 / 162 / 2336 / < 0.001
PRE / 4864 / 7466 / < 0.001 / 182 / 2356 / < 0.001
EVI / 6001 / 8603 / < 0.001 / 221 / 2395 / < 0.001
ELE / 6817 / 9419 / < 0.001 / 197 / 2371 / < 0.001

Table S2AIC summary for full and reduced generalized linear models for the avian migration ratio of islands from 70°E to 180°E. The criterion for model selection (ΔAIC) was computed with the full dataset (n = 4873 grid cells). AIC = Akaike Information Criterion; ΔAIC = AIC difference between full and reduced models; Akaike weight = relative likelihood of model; TEM, EVI, and PRE = annual range of ambient temperature (°C), the Enhanced Vegetation Index, and precipitation (mm), respectively; ISO = island isolation; ELE = elevational range (m).

Islands
Explanatory variables / ΔAIC / AIC / Akaike weight
TEM + EVI + PRE + ELE + ISO / 0 / 566 / 0.90
TEM + EVI + PRE + ISO / 5 / 571 / 0.10
TEM + PRE+ ELE + ISO / 34 / 600 / < 0.001
TEM + EVI + ELE + ISO / 150 / 716 / < 0.001
TEM + EVI + PRE + ELE / 157 / 723 / < 0.001
EVI + PRE + ELE + ISO / 365 / 931 / < 0.001
TEM + PRE +ISO / 35 / 601 / < 0.001
TEM + ELE +ISO / 155 / 721 / < 0.001
TEM + EVI + ISO / 158 / 724 / < 0.001
TEM + EVI + PRE / 174 / 740 / < 0.001
TEM + PRE + ELE / 212 / 778 / < 0.001
TEM + EVI + ELE / 251 / 817 / < 0.001
EVI + ISO + PRE / 372 / 938 / < 0.001
EVI + PRE + ELE / 479 / 1045 / < 0.001
EVI + ISO + ELE / 735 / 1301 / < 0.001
ISO + PRE + ELE / 866 / 1432 / < 0.001
Islands
Explanatory variables / ΔAIC / AIC / Akaike weight
TEM + ISO / 161 / 727 / < 0.001
TEM + PRE / 223 / 789 / < 0.001
TEM + EVI / 271 / 837 / < 0.001
TEM + ELE / 271 / 837 / < 0.001
EVI + PRE / 498 / 1064 / < 0.001
EVI + ISO / 754 / 1320 / < 0.001
EVI + ELE / 776 / 1342 / < 0.001
PRE + ISO / 864 / 1430 / < 0.001
PRE + ELE / 1068 / 1634 / < 0.001
ISO + ELE / 1228 / 1794 / < 0.001
TEM / 286 / 852 / < 0.001
EVI / 804 / 1370 / < 0.001
PRE / 1070 / 1636 / < 0.001
ISO / 1229 / 1795 / < 0.001
ELE / 1349 / 1915 / < 0.001

Fig. S3 The annual range in (a) ambient temperature (°C), (b) the Enhanced Vegetation Index, and (c) precipitation (mm) from East Asia to New Zealand (Behrmann projection).

Data S4Sources for the avian database of distribution rangesof breeding and non-breeding distribution ranges of 3,545 terrestrial species that breed between70°E to 180°E.

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