Organic Matter Redox State Driven by Specific Sources in Mangrove Sediments: A Case Study from Peruvian Ecosystems

In order to determine the organic matter redox state in relation specific sources mangrove sediments, two 60 cm-long sediment cores were collected from mangrove-covered and mudflat zones within a forest Peru. Sediment subsamples these analyzed δ13C values C:N ratios, whereas indices, namely, electrochemical (fEAOM) spectroscopical (A1650/A3400) taken previous study correlated with geochemical indices obtained this work. These may provide accurate information on sedimentary diagenesis by oxidative processes through its state. The results show that index for sediments exhibited positive correlation negative molar ratios. correlations suggest more labile derived non-terrestrial is oxidized than vegetation. However, was not valid zones, where non-significant between observed. Furthermore, of deposited over time dependent source mixing influences, being better preserved presence mangrove-derived matter.