Total enzyme activity (before filtration) and dissolved enzyme activity (after filtration) in Zurich.

<p>(a) Acid phosphatases (AP), (b) β-d-glucosidases (BG), and (c) β-d-glucosaminidases (NAG) in each species. A closed symbol represents that dissolved enzyme activity was not detectable and was treated as zero. The differences in mean values between untreated and filtered fluid were examined by the Wilcoxon signed rank test, and p-values were adjusted by the BH method for multiple comparison and were shown in the upper box for each species (unadjusted p-values are shown in brackets). ns: not significant.