Research Article
Changes in Abiotic Drivers of Green Sea Urchin Demographics following the Loss of a Keystone Predator
Table 4
SIMPER analyses comparing the relative contribution of each of the five binned size classes to the observed differences among time periods.
| Predecline vs. end of decline | | | | | | | Average | | | | | | | Size | Predecline | End of decline | Av.Diss | Diss/SD | Contrib% | Cum.% | Category | Av.Abund | Av.Abund | Recruit | 87.43 | 80.38 | 26.14 | 1.21 | 45.69 | 45.69 | Small | 43.13 | 70.15 | 18.72 | 1.17 | 32.71 | 78.41 | Medium | 12.34 | 34.51 | 10.84 | 0.89 | 18.95 | 97.35 | Large | 1.87 | 1.89 | 1.13 | 0.43 | 1.97 | 99.32 | Extralarge | 0.94 | 0.2 | 0.39 | 0.18 | 0.68 | 100 |
| Predecline vs. postdecline 1 | | | | | | | Average | | | | | | | Species | Predecline | Postdecline 1 | Av.Diss | Diss/SD | Contrib% | Cum.% | Av.Abund | Av.Abund | Recruit | 87.43 | 89.92 | 26.36 | 1.28 | 45.09 | 45.09 | Small | 43.13 | 44.59 | 14.16 | 1.1 | 24.21 | 69.3 | Medium | 12.34 | 31.05 | 10.28 | 0.84 | 17.59 | 86.89 | Large | 1.87 | 14.44 | 5.15 | 0.62 | 8.81 | 95.7 | Extralarge | 0.94 | 6.4 | 2.51 | 0.39 | 4.3 | 100 |
| End of decline vs. postdecline 1 | | | | | | | Average | | | | | | | Species | End of decline | Postdecline 1 | Av.Diss | Diss/SD | Contrib% | Cum.% | Av.Abund | Av.Abund | Recruit | 80.38 | 89.92 | 24.57 | 1.17 | 42.03 | 42.03 | Small | 70.15 | 44.59 | 15.99 | 1.16 | 27.36 | 69.39 | Medium | 34.51 | 31.05 | 11.24 | 0.93 | 19.22 | 88.61 | Large | 1.89 | 14.44 | 4.54 | 0.6 | 7.77 | 96.39 | Extralarge | 0.2 | 6.4 | 2.11 | 0.36 | 3.61 | 100 |
| Predecline vs. postdecline 2 | | | | | | | Average | | | | | | | Species | Predecline | Postdecline 2 | | | | | Av.Abund | Av.Abund | Av.Diss | Diss/SD | Contrib% | Cum.% | Recruit | 87.43 | 97.13 | 26.37 | 1.3 | 43.66 | 43.66 | Small | 43.13 | 55.84 | 15.17 | 1.1 | 25.12 | 68.78 | Medium | 12.34 | 27.65 | 8.71 | 0.81 | 14.42 | 83.2 | Large | 1.87 | 16.16 | 5.91 | 0.64 | 9.79 | 93 | Extralarge | 0.94 | 10.57 | 4.23 | 0.49 | 7 | 100 |
| End of decline vs. postdecline 2 | | | | | | | Average | | | | | | | Species | End of decline | Postdecline 2 | Av.Diss | Diss/SD | Contrib% | Cum.% | Av.Abund | Av.Abund | Recruit | 80.38 | 97.13 | 24.28 | 1.19 | 40.89 | 40.89 | Small | 70.15 | 55.84 | 16.08 | 1.12 | 27.09 | 67.97 | Medium | 34.51 | 27.65 | 10.14 | 0.89 | 17.08 | 85.06 | Large | 1.89 | 16.16 | 5.22 | 0.61 | 8.78 | 93.84 | Extralarge | 0.2 | 10.57 | 3.66 | 0.46 | 6.16 | 100 |
| Postdecline 1 vs. postdecline 2 | | | | | | | Average | | | | | | | Species | Postdecline 1 | Postdecline 2 | Av.Diss | Diss/SD | Contrib% | Cum.% | Av.Abund | Av.Abund | Recruit | 89.92 | 97.13 | 24.87 | 1.22 | 42.79 | 42.79 | Small | 44.59 | 55.84 | 13.48 | 1.09 | 23.19 | 65.98 | Medium | 31.05 | 27.65 | 9.45 | 0.88 | 16.25 | 82.23 | Large | 14.44 | 16.16 | 6.12 | 0.8 | 10.54 | 92.77 | Extralarge | 6.4 | 10.57 | 4.2 | 0.57 | 7.23 | 100 |
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