Wildfire-Derived Pyrogenic Carbon Modulates Riverine Organic Matter and Biofilm Enzyme Activities in an In Situ Flume Experiment
Lukas Thuile Bistarelli, Caroline Poyntner, Cristina Santín, Stefan H. Doerr, Lauren Talluto, Gabriel Singer, Gabriel Sigmund
Abstract
(-0.31 unit) and a higher pH (0.25 unit) was associated with changes in enzymatic activities in benthic biofilms, including a lower recalcitrance index (β-glucosidase/phenol oxidase), suggesting preferential usage of recalcitrant over readily available DOM by biofilms. The deposition of particulate PyC onto biofilms may further modulate the impacts of PyC due to direct contact with the biofilm matrix. This study highlights the importance of PyC for in-stream biogeochemical organic matter cycling in fire-affected watersheds.
Topics & Concepts
Dissolved organic carbonEnvironmental chemistryChemistryBiogeochemical cycleOrganic matterSorptionTotal organic carbonBenthic zoneBiofilmEcologyAdsorptionGeologyOrganic chemistryBiologyBacteriaPaleontologyToxic Organic Pollutants ImpactPer- and polyfluoroalkyl substances researchMarine and coastal ecosystems