Relative Humidity Hypothesis #1 Diurnal Air Temperature Cycle Hypothesis #2 Island ma ma bb rc  rc nd p-value m b r n p-value Puerto Rico e         2.47 -154 0.54 44 <0.001 Hispaniola -4.05 362 -0.74 13 0.0019 1.00 -60  0.52 68  <0.001 Hawaii           0.379f -50 0.091 37 0.29 Maui           287 -439 0.37 20  0.054 Oahu           7.23 -1130 0.65 30 <0.001 Kauai           9.01 -1430 0.90 16 <0.001

a m is slope b b is intercept c r is Pearson correlation coefficient d n is sample size e blank cells represent no data f highlighted in gray are insignificant

Table 1: Results of assaying the hypotheses on oceanic tropical islands.