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Multiple Drying Aspects Shape Dissolved Organic Matter Composition in Intermittent Streams by Verónica Granados; Rebeca Arias-Real; Cayetano Gutiérrez-Cánovas; Biel Obrador; Andrea Butturini is a Environmental Science article available to read on EtoBox.

What is Multiple Drying Aspects Shape Dissolved Organic Matter Composition in Intermittent Streams about?

Water availability is a fundamental driver of biogeochemical processing in highly dynamic ecosystems such as intermittent rivers and ephemeral streams (IRES), which are recognized as the most common fluvial ecosystem globally. Because of their global extent, IRES have a remarkable contribution to organic matter processing, which is expected to intensify as climate change and water extraction expand IRES extension. Nevertheless, the effect of the complexity of the drying process on river biogeochemistry remains unclear. This study investigated how drying aspects affect the dissolved organic carbon (DOC) concentration and composition in 35 streams along a wide flow-intermittence gradient in the NE Iberian Peninsula. To do that, four drying aspects: annual drying duration, annual frequency, duration of the last drying event, and time since the last drying event were characterized. Results showed that DOC concentration and the contribution of humic-like compounds were positively associated with intensifying drying conditions. In addition, protein-like compounds decreased over the drying gradient. More specifically, changes in DOC concentration were driven mainly by annual drying durati

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Author

Verónica Granados; Rebeca Arias-Real; Cayetano Gutiérrez-Cánovas; Biel Obrador; Andrea Butturini

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)