Table 1 Morph frequencies and ages of sites

From: Rapid, habitat-related evolution of land snail colour morphs on reclaimed land

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

***

  1. Abbreviation : NS, not significant.
  2. 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.