https://www.socictopen.socict.org/files/original/dc0c25fd4e1764fe240d21e650b9b4f5.pdf 76948547f48ffd98703da5190ea31b8b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Dissolved Organic Matter Cycling in the Coastal Upwelling System Off Central Peru During an “El Niño” Year Creator An entity primarily responsible for making the resource Thorsten Dittmar, Maricarmen Igarza, Michelle Graco, Jutta Niggemann Description An account of the resource The Peruvian upwelling system (PUS) is among the most productive regions in the ocean, with high rates of primary production and an intense oxygen minimum zone (OMZ). The main perturbation of this system is associated to “El Niño” (EN), which affects water mass distribution and reduces primary production. Previous studies in the PUS provided first insights into the dynamics of dissolved organic matter (DOM), but high-resolution studies involving the molecular characterization of the DOM pool to reveal the processes that affect the carbon cycle in this highly productive system are lacking. We characterized the molecular composition of solid-phase extractable DOM (SPE-DOM) in the coastal upwelling system off Central Peru and linked it to specific processes that affect DOM cycling. Seasonal sampling (April, August, and December) was carried out off Central Peru (12°S) during 2015, a low productivity year marked by EN conditions. The DOM molecular composition was obtained via Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). Solid-phase extractable dissolved organic carbon (SPE-DOC) concentrations showed significant differences (p &lt; 0.05) between the water masses present off central Peru. In order to explore if changes in SPE-DOC concentrations were the result of water mass mixing, we applied a conservative mixing (CM) model. The model revealed a non-conservative behavior of SPE-DOC and allowed us to identify two distinct groups of samples with increased and decreased SPE-DOC concentrations, respectively, and one group of samples inside the CM range. Differences in environmental parameters characterizing these groups were in accordance with respective processes associated to production and degradation of SPE-DOC. The trends observed for molecular parameters revealed the imprint of processes related to DOM production and DOM degradation, both biotic (microbial degradation) and abiotic (photodegradation). Our study suggests that even under low productivity conditions like EN, there is an active cycling of the DOM pool off central Peru. Date A point or period of time associated with an event in the lifecycle of the resource 2019 Subject The topic of the resource Carbon cycling, Central Peru, Peruvian upwelling system, dissolved organic matter, el niño, ultrahigh resolution mass spectrometry Identifier An unambiguous reference to the resource within a given context 10.3389/fmars.2019.00198 Source A related resource from which the described resource is derived Frontiers in Marine Science Publisher An entity responsible for making the resource available Frontiers Media S.A. Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Science, General. Including nature conservation, geographical distribution Relation A related resource <a href="https://www.frontiersin.org/article/10.3389/fmars.2019.00198/full" target="_blank" rel="noreferrer noopener">https://www.frontiersin.org/article/10.3389/fmars.2019.00198/full</a>