S1 Data - Origin, trophic transfer and recycling of particulate organic matter in two upwelling bays of Humboldt Current System: Insights from compound-specific isotopic compositions of amino acids

S1 Fig. Vertical profiles of Chlorophyl-a, and NH 4 + contents in MB (A and C) and AB (B and D). S2 Fig. Vertical profiles of NO 2 - , and NO 3 - contents in MB (A and C) and AB (B and D). S3 Fig. Vertical profiles of PO 4 3- , and TOC contents in MB (A and C) and AB (B and D). S4 Fig. (A) A box plot accompanied by jitter points illustrates the dissolved oxygen inventories in the water columns of MB and AB. Additionally, vertical profiles of water column stratification, represented by the Brünt-Väisälä frequency, are presented for both MB (A) and AB (B). S5 Fig. Vertical profiles of mean values for (A) δ 15 N Phe-normalized Tr-AA, and (B) Sr-AA in the water columns of MB and BA. Data are presented as mean ± standard deviation values. S6 Fig. Box and jitter plots of (A) δ 15 N and (B) δ 13 C of THAA in suspended POM from MB and AB. S7 Fig. Bayesian stable isotope mixing model (MixSIAR) applied to δ 15 N end-members in POM samples from two depths in Mejillones and Antofagasta Bays. The top panel shows results from Mejillones Bay at two depths: 5–20 m (A-B) and 35–45 m (C-D). Panels A and C display the range of variability for the end-members, along with the POM data at their respective depths, and density plots illustrating the prior and posterior distributions for each source. Panels B and D depict the relationships (distributions and correlations) between the different sources within the mixture. The bottom panel shows the same distributions for Antofagasta Bay. S8 Fig. Biplot data on phenylalanine (Phe)-normalized threonine (Thr) and alanine (Ala) δ 15 N values for end-members (microbially degraded organic matter, MDOM; fecal pellets, FP; phytoplankton; and zooplankton) as well as suspended and sinking POM from MB and AB are presented as means ± standard deviations. Suspended and sinking POM data are from this study. Other data are from published studies, detailed in Table S1. S1 Table. Phe-normalized δ 15 N values of Thr and Ala used in S7 Fig., with metadata. S2 Table. Full data on δ 15 N amino acids in ...