Author(s): Mirzaei Y; Douglas PMJ; Gélinas Y;

The priming effect (PE) refers to the enhanced remineralization of recalcitrant organic carbon (OC) driven by the respiration of labile OC, potentially increasing CO2 fluxes from aquatic ecosystems. Patterns of PE induced by marine and terrestrial OC inputs can be explored through sedimentary contributions to the degraded OC pool. In this study, coastal s ...

Article GUID: 39700996

Author(s): Mirzaei Y; Gélinas Y;

Coastal sediments are the main deposition center for allochthonous and autochthonous organic carbon (OC). The discharge of terrestrial biomass, anthropogenic activities, oceanic primary productivity, and natural events contribute to this carbon pool. The OC buried in sediments undergoes alteration through physical, biological and chemical processes, becom ...

Article GUID: 39117203

Author(s): Joshani A; Mirzaei Y; Barber A; Balind K; Gobeil C; Gélinas Y;

The biogeochemical cycles of iron and organic carbon (OC) are closely interconnected in terrestrial and aquatic systems. In ocean waters, the concentration of reactive Fe is tightly controlled by soluble organic ligands. In soils, Fe stabilizes OC by forming aggregates that shield OC from degradation. In lake sediments however, the role of Fe in the prese ...

Article GUID: 38499107

Author(s): Leone F; Imfeld A; Mirzaei Y; Gélinas Y;

Vapour-phase fumigation with HCl is routinely used to remove inorganic carbon in preparation for the measurement of the concentration and d13C value of organic carbon in a sample using elemental analysis coupled to an isotope ratio mass spectrometer. Acidification of the sample to be analyzed can lead to the loss of low molecular weight conjugate bases as ...

Article GUID: 38097918