Table 2.
Summary of model fits for the frequency of occurrences of species. (AIC and model weights for the models compared in each of the four microfossil groups using frequency of occurrence data. Each of the groups are also subsetted such that all species are used (all), only species with more than 10 standardized data points or s.d.p.s (>10) or more than 20 s.d.p.s (>20) are used in model fitting. N, number of species. Best models in each case are in italics.)
| all | >10 | >20 | |||||
|---|---|---|---|---|---|---|---|
| AIC | weight | AIC | weight | AIC | weight | ||
| diatoms | N | 453 | 76 | 15 | |||
| uniform | 730.98 | 0.01 | 240.75 | 0.12 | 59.88 | 0.21 | |
| linear | 729.75 | 0.02 | 241.98 | 0.06 | 61.85 | 0.08 | |
| symmetric | 721.77 | 0.97 | 238.78 | 0.31 | 60.91 | 0.12 | |
| skewed | 806.77 | 0.00 | 237.80 | 0.51 | 57.75 | 0.60 | |
| nannoplankton | N | 372 | 108 | 29 | |||
| uniform | 726.77 | 0.03 | 376.26 | 0.00 | 126.58 | 0.03 | |
| linear | 728.52 | 0.01 | 369.90 | 0.00 | 124.60 | 0.07 | |
| symmetric | 719.82 | 0.96 | 374.27 | 0.00 | 124.66 | 0.07 | |
| skewed | 777.59 | 0.00 | 358.18 | 1.00 | 119.56 | 0.84 | |
| planktic foraminifers | N | 209 | 99 | 24 | |||
| uniform | 593.38 | 0.00 | 338.02 | 0.00 | 112.29 | 0.00 | |
| linear | 593.38 | 0.00 | 336.21 | 0.00 | 112.69 | 0.00 | |
| symmetric | 581.89 | 0.99 | 328.16 | 0.00 | 109.50 | 0.00 | |
| skewed | 593.72 | 0.00 | 294.85 | 1.00 | 89.21 | 1.00 | |
| radiolarians | N | 404 | 129 | 24 | |||
| uniform | 773.05 | 0.01 | 402.12 | 0.00 | 86.84 | 0.04 | |
| linear | 773.71 | 0.01 | 402.69 | 0.00 | 87.75 | 0.03 | |
| symmetric | 763.77 | 0.98 | 396.68 | 0.01 | 86.63 | 0.04 | |
| skewed | 810.64 | 0.00 | 388.07 | 0.99 | 80.62 | 0.89 | |