Fig. 4
From: River channel connectivity shifts metabolite composition and dissolved organic matter chemistry
Multivariate analysis of metabolites and environmental drivers using capscale. Constrained analysis of principal coordinates (capscale) ordinations are based on Bray-Curtis dissimilarity, computed from normalized peak intensities, and used to test for an association of metabolite composition (as derived from electron ionization gas chromatography mass spectrometry) with spatial, climate, and fluvial characteristics. Red crosses represent individual metabolites, black circles represent samples, black vectors represent environmental variables with a significance level of <0.05 (p-values based on analysis of variance with 1000 permutations; the relationship between all potential predictor variables and metabolites is shown in Supplementary Figure 8). DOC, dissolved organic carbon; Precip, month-averaged precipitation; Temp, month-averaged temperature; Proteins, EEMS region I; Discharge, daily average; Snow, daily snow depth at Wild Basin
