Ecological Archives A016-026-A2
Claudia Gratton and Robert F. Denno. 2006. Arthropod food web restoration following removal of an invasive wetland plant. Ecological Applications 16:622–631.
Appendix B. Means (SEM) of 
13C and 15N and summary of mixed-model ANOVA for basal resources (plants, litter, soil) and arthropod trophic groups (detritus/algal feeders, herbivores, predators, and spiders) analyzed in each habitat type (reference spartina, restored spartina, mixed spartina-phragmites and phragmites) at the Alloway Creek restoration site (Salem County, New Jersey) in August 2001. Same letters within a row indicate habitat types are not significantly different from each other (P > 0.05, Sidak-adjustment for multiple comparisons).
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| Resources/Arthropods |
Mean (SEM)
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ANOVA
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| Type/Trophic group |
Isotope
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Reference spartina
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Restored spartina
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Mixed spartina-phragmites
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Phragmites
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F
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P
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(ndf, ddf)†
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| Resources |
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| Plants |
δ13C
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-12.85(0.18)a
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-12.87(0.18)a
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-12.86(0.18)a
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-26.21(0.14)b
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2002.90
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<0.0001
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(3, 20)
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δ15N
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10.42(0.55)
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9.44(0.55)
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10.05(0.55)
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8.92(0.41)
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1.90
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0.16
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(3, 20)
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| Thatch |
δ13C
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-13.19(0.16)a
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-13.23(0.17)a
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-19.26(1.38)b
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-25.56(0.34)c
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85.88
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<0.0001
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(3, 18)
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δ15N
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9.80(0.60)
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9.25(0.54)
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8.79(0.77)
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8.66(0.55)
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0.71
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0.56
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(3, 18)
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| Soil |
δsup>13C
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-20.08(0.41)a
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-21.10(0.41)ab
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-22.34(0.41)bc
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-23.44(0.33)c
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15.48
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<0.0001
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(3, 19)
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δ15N
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7.31(0.25)
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6.89(0.25)
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6.68(0.25)
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6.84(0.19)
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1.24
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0.32
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(3, 19)
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| Arthropods |
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| Detritus/algal feeders |
δsup>13C
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-15.50(0.90)a
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-14.61(0.88)a
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-16.51(0.86)a
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-21.73(0.79)b
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15.23
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<0.001
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(3, 12.1)
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δ15N
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11.04(0.46)
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10.36(0.43)
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10.50(0.41)
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9.92(0.37)
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1.23
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0.34
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(3, 11.2)
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| Herbivores |
δ13C
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-12.88(0.45)a
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-12.52(0.46)a
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-12.56(0.46)a
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-24.20(0.45)b
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159.25
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<0.0001
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(3, 9.6)
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δ15N
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11.88(0.58)
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11.46(0.61)
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12.10(0.58)
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11.40(0.56)
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0.33
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0.8
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(3, 16)
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| Predators |
δ13C
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-14.26(0.56)a
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-14.61(0.69)a
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-15.99(0.66)a
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-20.61(0.68)b
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19.75
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<0.0001
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(3, 26.8)
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δ15N
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12.93(0.17)
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12.45(0.28)
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12.78(0.30)
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12.48(0.20)
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1.24
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0.33
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(3, 16.2)
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| Spiders |
δ13C
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-13.72(0.23)a
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-13.66(0.22)a
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-15.21(0.31)b
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-20.36(0.34)c
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100.99
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<0.0001
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(3, 14.6)
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δ15N
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13.68(0.16)
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13.22(0.13)
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13.09(0.17)
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13.17(0.19)
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2.7
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0.07
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(3, 20.7)
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† ndf, ddf, numerator and denominator degrees of freedom, respectively.
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