Table 4.

Multiple comparisons of means using Tukey contrasts and single-step method for adjusting P-values using the ‘glht’ function from the R package ‘multcomp’. P-values for each comparison are shown for top five compounds across habitat types. Log normalized peak ratios were used as input.

Habitat	Dodecanoic acid	Tetradecanoic acid	n-Pentadecanoic acid	( +)-α-Tocopherol	Cholecalciferol
Suburban-Rural	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Urban–Rural	0.429	0.027	0.999	< 0.001	0.019
Urban-Suburban	< 0.001	0.002	< 0.001	0.81	0.021