Table 1. Morph frequencies and ages of sites.
| Site name | Open/closed | N | Yellow | Pink | Brown | Yellow (eU) | 00300 | 00345 | 12345 | fusion |
|---|---|---|---|---|---|---|---|---|---|---|
| Kuinderbos | Shaded (46 year) | 197 | 101 (0.51) | 36 (0.18) | 60 (0.30) | 67 (0.34) | 3 (0.05) | 21 (0.34) | 33 (0.53) | 18 (0.55) |
| Kuinderbos | Open | 182 | 134 (0.74) | 36 (0.20) | 12 (0.07) | 113 (0.62) | 21 (0.20) | 53 (0.50) | 21 (0.20) | 1 (0.05) |
| *** | NS | *** | *** | ** | * | *** | *** | |||
| Nagele | Shaded (56 year) | 97 | 3 (0.03) | 43 (0.44) | 51 (0.53) | 1 (0.01) | 0 (0.00) | 1 (0.03) | 36 (0.90) | 14 (0.39) |
| Nagele | Open | 91 | 3 (0.03) | 73 (0.80) | 15 (0.16) | 0 (0.00) | 0 (0.00) | 0 (0.00) | 44 (1.00) | 7 (0.16) |
| NS | *** | *** | NS | NS | NS | NS | * | |||
| Voorsterbos | Shaded (7 year) | 196 | 169 (0.86) | 21 (0.11) | 6 (0.03) | 92 (0.47) | 6 (0.04) | 83 (0.49) | 76 (0.44) | 9 (0.12) |
| Voorsterbos | Open | 175 | 111 (0.63) | 55 (0.31) | 9 (0.05) | 87 (0.50) | 45 (0.37) | 44 (0.36) | 25 (0.21) | 3 (0.12) |
| *** | *** | NS | NS | *** | * | *** | NS | |||
| Knarbos | Shaded (36 year) | 179 | 102 (0.57) | 30 (0.17) | 47 (0.26) | 17 (0.09) | 17 (0.16) | 2 (0.02) | 89 (0.82) | 43 (0.48) |
| Knarbos | Open | 219 | 84 (0.38) | 48 (0.22) | 87 (0.40) | 3 (0.01) | 2 (0.02) | 1 (0.01) | 92 (0.96) | 39 (0.42) |
| *** | NS | ** | *** | *** | NS | ** | NS | |||
| Zuiveringsveld | Shaded (46 year) | 153 | 52 (0.34) | 72 (0.47) | 29 (0.19) | 46 (0.30) | 21 (0.31) | 24 (0.35) | 17 (0.25) | 4 (0.24) |
| Zuiveringsveld | Open | 228 | 78 (0.34) | 95 (0.42) | 55 (0.24) | 69 (0.30) | 30 (0.27) | 55 (0.50) | 18 (0.16) | 3 (0.17) |
| NS | NS | NS | NS | NS | NS | NS | NS | |||
| Kamperhoek | Shaded (36 year) | 223 | 136 (0.61) | 46 (0.21) | 41 (0.18) | 106 (0.48) | 47 (0.28) | 77 (0.46) | 40 (0.24) | 25 (0.63) |
| Kamperhoek | Open | 185 | 118 (0.64) | 14 (0.08) | 53 (0.29) | 105 (0.57) | 34 (0.31) | 63 (0.57) | 13 (0.12) | 2 (0.15) |
| NS | *** | * | NS | NS | NS | * | ** | |||
| Dijkgatsbosch | Shaded (57 year) | 151 | 98 (0.65) | 31 (0.21) | 22 (0.15) | 71 (0.47) | 5 (0.06) | 43 (0.48) | 35 (0.39) | 13 (0.37) |
| Dijkgatsbosch | Open | 155 | 52 (0.34) | 85 (0.55) | 18 (0.12) | 28 (0.18) | 17 (0.15) | 46 (0.41) | 48 (0.43) | 3 (0.06) |
| *** | *** | NS | *** | * | NS | NS | *** | |||
| Kolhorn | Shaded (69 year) | 239 | 185 (0.77) | 3 (0.01) | 51 (0.21) | 148 (0.62) | 1 (0.01) | 82 (0.68) | 37 (0.31) | 16 (0.43) |
| Kolhorn | Open | 168 | 165 (0.98) | 1 (0.01) | 2 (0.01) | 160 (0.95) | 2 (0.13) | 7 (0.47) | 5 (0.33) | 0 (0.00) |
| *** | NS | *** | *** | * | NS | NS | NS | |||
| Robbenoordbos | Shaded (77 year) | 161 | 91 (0.57) | 3 (0.02) | 67 (0.42) | 61 (0.38) | 8 (0.13) | 23 (0.36) | 33 (0.52) | 16 (0.48) |
| Robbenoordbos | Open | 278 | 153 (0.55) | 51 (0.18) | 74 (0.27) | 118 (0.42) | 19 (0.13) | 79 (0.53) | 49 (0.33) | 7 (0.14) |
| NS | *** | *** | NS | NS | * | * | *** | |||
| Cirkelbos | Shaded (2 year) | 158 | 127 (0.80) | 31 (0.20) | 0 (0.00) | 87 (0.55) | 39 (0.30) | 49 (0.37) | 42 (0.32) | 18 (0.43) |
| Cirkelbos | Open | 96 | 76 (0.79) | 20 (0.21) | 0 (0.00) | 59 (0.61) | 17 (0.26) | 28 (0.42) | 20 (0.30) | 9 (0.45) |
| NS | NS | NS | NS | NS | NS | NS | NS | |||
| Kathedralenbos | Shaded (22 year) | 148 | 64 (0.43) | 75 (0.51) | 9 (0.06) | 35 (0.24) | 16 (0.13) | 36 (0.30) | 66 (0.55) | 40 (0.61) |
| Kathedralenbos | Open | 163 | 136 (0.83) | 4 (0.02) | 23 (0.14) | 93 (0.57) | 35 (0.30) | 34 (0.29) | 42 (0.36) | 8 (0.19) |
| *** | *** | * | *** | ** | NS | ** | *** | |||
| Wilgenreservaat | Shaded (36 year) | 216 | 182 (0.84) | 31 (0.14) | 3 (0.01) | 46 (0.21) | 25 (0.15) | 3 (0.02) | 135 (0.81) | 40 (0.53) |
| Wilgenreservaat | Open | 332 | 253 (0.76) | 77 (0.23) | 2 (0.01) | 65 (0.20) | 41 (0.18) | 2 (0.01) | 184 (0.80) | 8 (0.19) |
| * | * | NS | NS | NS | NS | NS | *** |
Abbreviation : NS, not significant.
The estimated age (in years, ±3 year) at the time of sampling is given for the shaded habitat. Yellow (eU) comprises all yellow shells with bands 1 and 2 missing. Frequencies of banding categories are given as the proportion of all banded snails. For rarer banding categories, see Supplementary Table 1. Band fusion is calculated as the number of 5-banded snails with at least two bands fused. Statistical significances (χ2-test): NS P>0.05; *P<0.05; **P<0.01; ***P<0.001.