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, Multigroup path model of soil mesofaunal food webs after filtered or unfiltered knotweed rhizome addition. Differences between the 770 observed multigroup model and a "null model" with fixed Intercepts and Regressions was assessed with an ANOVA. Green arrows indicate a 771 positive correlation while red arrows indicate a negative correlation. Arrow width is proportional to the strength of the relationship. KRE concent. = 772 knotweed rhizome extract concentration level, Fungi = ergosterol concentration, Figure, vol.5

, Fungivorous nematodes abundance, Bacter. nemat. = Bacterivorous nematodes abundance, Predat. nemato. = Predatorous nematodes 774 abundance, Herb.-Fung. Acari = Herbo-fungivorous Acari, Predat. Acari = Predatorous Acari

, Table 1: Relative differences in physico-chemical and microbiological variables compared to control values (%) between knotweed rhizome extract 781 exposed pots and control pots. Values are means +/-SE. P-values are from repeated Wilcoxon rank-sum tests on absolute relative differences