<p> Supplementary document</p><p>Table S1: Scheffe multiple comparisons test of differences in mean population density for 24 species. Bold probabilities indicate that the mean </p><p> densities were significantly different with each other. </p><p>Species code Ost4 Ost5 Os5A Ost6 Harp HarpM CycL Cyc9 CycS CycM Daphn Leid Alon CrabL Tany Mos1 Dipter Nema Gyratr Oligo PolyT PolyJ Ost1 Ost2 Density 0.44 0.60 1.34 1.10 2.39 0.64 2.26 0.47 0.96 0.29 0.76 0.25 0.69 1.14 0.71 0.88 0.14 1.35 0.74 0.95 0.28 0.31 1.00 1.08 (log+1) Ost4 Ost5 1.00 Os5A 0.42 0.86 Ost6 0.96 1.00 1.00 Harp 0.00 0.00 0.11 0.00 HarpM 1.00 1.00 0.92 1.00 0.00 CycL 0.00 0.00 0.40 0.02 1.00 0.00 Cyc9 1.00 1.00 0.52 0.98 0.00 1.00 0.00 CycS 1.00 1.00 1.00 1.00 0.00 1.00 0.00 1.00 CycM 1.00 1.00 0.10 0.72 0.00 1.00 0.00 1.00 0.95 Daphn 1.00 1.00 0.99 1.00 0.00 1.00 0.00 1.00 1.00 1.00 Leid 1.00 1.00 0.06 0.59 0.00 1.00 0.00 1.00 0.90 1.00 1.00 Alon 1.00 1.00 0.96 1.00 0.00 1.00 0.00 1.00 1.00 1.00 1.00 1.00 CrabL 0.92 1.00 1.00 1.00 0.00 1.00 0.04 0.95 1.00 0.59 1.00 0.45 1.00 Tany 1.00 1.00 0.97 1.00 0.00 1.00 0.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Mos1 1.00 1.00 1.00 1.00 0.00 1.00 0.00 1.00 1.00 0.99 1.00 0.98 1.00 1.00 1.00 Dipter 1.00 1.00 0.01 0.27 0.00 1.00 0.00 1.00 0.66 1.00 0.98 1.00 1.00 0.18 0.99 0.85 Nema 0.39 0.84 1.00 1.00 0.12 0.91 0.42 0.50 1.00 0.09 0.99 0.05 0.95 1.00 0.97 1.00 0.01 Gyratr 1.00 1.00 0.99 1.00 0.00 1.00 0.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.99 0.98 Oligo 1.00 1.00 1.00 1.00 0.00 1.00 0.00 1.00 1.00 0.96 1.00 0.92 1.00 1.00 1.00 1.00 0.69 1.00 1.00 PolyT 1.00 1.00 0.09 0.69 0.00 1.00 0.00 1.00 0.94 1.00 1.00 1.00 1.00 0.56 1.00 0.99 1.00 0.08 1.00 0.95 PolyJ 1.00 1.00 0.12 0.75 0.00 1.00 0.00 1.00 0.96 1.00 1.00 1.00 1.00 0.63 1.00 0.99 1.00 0.11 1.00 0.97 1.00 Ost1 1.00 1.00 1.00 1.00 0.00 1.00 0.00 1.00 1.00 0.92 1.00 0.84 1.00 1.00 1.00 1.00 0.56 1.00 1.00 1.00 0.90 0.93 Ost2 0.97 1.00 1.00 1.00 0.00 1.00 0.02 0.98 1.00 0.75 1.00 0.63 1.00 1.00 1.00 1.00 0.31 1.00 1.00 1.00 0.73 0.79 1.00 Table S2. Slope and Pearson correlation coefficients, r, of the relationship between number of temporal turnover and environmental variability (EV); </p><p> and CE and species richness for each of 24 species in a cluster of 49 rock pools. </p><p>Species code Scientific name CE Vs EV CE Vs EV (Pure) CE Vs S CE Vs S (Pure) r2 slope r p r2 slope r p r2 slope r p r2 slope r p Alon Alona davidii 0.021 0.029 0.144 0.557 0.011 0.021 0.106 0.666 0.044 -0.08 -0.21 0.39 0.021 -0.06 -0.14 0.557 CrabL Sesarma miersi 0.18 -0.1 -0.4 0.01 0.14 -0.1 -0.4 0.01 0.061 0.071 0.247 0.115 0.009 0.028 0.093 0.556 Rathburn Cyc9 Copepod sp. 0.095 0.06 0.308 0.214 0.014 0.026 0.119 0.636 0.4 -0.2 -0.6 0.01 0.36 -0.2 -0.6 0.01 CycL Orthocyclops 0.02 -0 -0.1 0 0.11 -0.1 -0.3 0.02 0.27 -0.1 -0.5 0 0.37 -0.2 -0.6 0 modestus (Herrick) CycM Metis sp. 0.54 0.17 0.74 0 0.33 0.16 0.57 0.03 0.224 -0.14 -0.47 0.088 0.113 -0.11 -0.34 0.24 CycS Paracyclops 0.064 0.035 0.253 0.142 0.044 0.03 0.209 0.229 0.063 -0.07 -0.25 0.146 0.027 -0.05 -0.17 0.342 fimbriatus (Fischer) Daphn Ceriodaphnia 0.098 0.055 0.313 0.178 0.086 0.049 0.293 0.21 0.009 -0.04 -0.1 0.684 0.002 0.016 0.042 0.859 rigaudi Richard Dipter Dipteran larvae 0.065 0.078 0.255 0.45 0.245 0.192 0.495 0.122 0.102 0.124 0.32 0.337 0.172 0.175 0.414 0.205 Gyratr Gyratrix 0.093 -0.03 -0.3 0.148 0.143 -0.04 -0.38 0.068 0.019 -0.02 -0.14 0.517 0.063 -0.04 -0.25 0.238 hermaphrodite s Harp Nitocra 0.11 -0.1 -0.3 0.02 0.18 -0.1 -0.4 0 0.1 -0.1 -0.3 0.03 0.19 -0.1 -0.4 0 spinipes Boeck HarpM Copepod 0.111 0.087 0.333 0.192 0.089 0.1 0.298 0.245 0.021 -0.06 -0.15 0.579 0.005 -0.04 -0.07 0.78 (genus, species, unidentified) Leid Leidigia leidigi 0.118 0.08 0.344 0.404 0.155 0.084 0.394 0.335 0.054 0.102 0.232 0.581 0.112 0.137 0.335 0.417 Mos1 Culex sp. 0.022 -0.02 -0.15 0.391 0.035 -0.03 -0.19 0.28 0 -0 -0.01 0.961 0.007 -0.03 -0.09 0.627 Nema Nematode sp. 0.03 0.03 0.18 0 0.014 0.02 0.116 0.469 0.123 -0.11 -0.35 0.025 0.082 -0.09 -0.29 0.07 Oligo Oligochaete sp. 0.114 -0.05 -0.34 0.063 0.172 -0.06 -0.41 0.02 0.12 -0.1 -0.4 0.05 0.27 -0.2 -0.5 0 Os5A Cypricercus sp. 0.18 0.09 0.43 0.01 0.19 0.1 0.44 0.01 0.003 -0.02 -0.06 0.744 0.007 0.029 0.083 0.626 Ost1 Cypridopsis cf. 0.15 0.08 0.39 0.02 0.072 0.054 0.268 0.12 0.137 -0.13 -0.37 0.028 0.063 -0.09 -0.25 0.145 mariae Rome Ost2 Heterocypris 0.002 0.008 0.044 0.81 0.029 -0.03 -0.17 0.343 0.43 -0.2 -0.7 0 0.5 -0.3 -0.7 0 sp. Ost4 Cytheromorph 0.05 0.028 0.223 0.487 0.019 0.016 0.139 0.66 0.243 -0.22 -0.49 0.103 0.07 -0.09 -0.26 0.406 a sp. Ost5 Candona sp. 0.35 0.13 0.6 0.01 0.25 0.12 0.5 0.03 0.014 -0.05 -0.12 0.624 0.005 0.031 0.072 0.769 Ost6 Potamocypris 0.045 0.042 0.211 0.203 0.008 0.018 0.09 0.592 0.043 -0.08 -0.21 0.21 0.024 -0.06 -0.16 0.353 sp. PolyJ Polychaete T 0.081 0.041 0.284 0.305 0.089 0.062 0.298 0.281 0.029 -0.03 -0.17 0.542 0.017 -0.02 -0.13 0.648 PolyT Dorsovilleid 0.204 0.029 0.452 0.091 0.058 0.078 0.24 0.389 0.3 -0.2 -0.5 0.04 0.26 -0.2 -0.5 0.05 polychaete Tany Tanypodid sp. 0.000 0.000 0.000 0.999 0.017 0.02 0.131 0.46 0.13 0.09 0.36 0.04 0.14 0.1 0.38 0.03</p>