Long-chain diols in rivers


Long-chain diols (LCDs) occur widespread in marine environments and also in lakes and rivers. Transport of LCDs from rivers may impact the distribution of LCDs in coastal environments, however relatively little is known about the distribution and biological sources of LCDs in river systems. In this study, we investigated the distribution of LCDs in suspended particulate matter (SPM) of three river systems (Godavari, Danube, and Rhine) in relation with precipitation, temperature, and source catchments. The dominant long-chain diol is the C32 1,15-diol followed by the C30 1,15-diol in all studied river systems. In regions influenced by marine waters, such as delta systems, the fractional abundance of the C30 1,15-diol is substantially higher than in the river itself, suggesting different LCD producers in marine and freshwater environments. A change in the LCD distribution along the downstream transects of the rivers studied was not observed. However, an effect of river flow is observed; i.e., the concentration of the C32 1,15-diol is higher in stagnant waters such as reservoirs and during seasons with river low stands. A seasonal change in the LCD distribution was observed in the Rhine, likely due to a change in the producers. Eukaryotic diversity analysis by 18S rRNA gene sequencing of SPM from the Rhine showed extremely low abundances of sequences (i.e., <0.32% of total reads) related to known algal LCD producers. Furthermore, incubation of the river water with 13C-labeled bicarbonate did not result in 13C incorporation into LCDs. This indicates that the LCDs present are mainly of fossil origin in the fast flowing part of the Rhine. Overall, our results suggest that the LCD producers in rivers predominantly reside in lakes or side ponds that are part of the river system.

Supplement to: Lattaud, Julie; Kirkels, Frédérique M S A; Peterse, Francien; Freymond, Chantal V; Eglinton, Timothy Ian; Hefter, Jens; Mollenhauer, Gesine; Balzano, Sergio; Villanueva, Laura; van der Meer, Marcel T J; Hopmans, Ellen C; Sinninghe Damsté, Jaap S; Schouten, Stefan (2018): Long-chain diols in rivers: distribution and potential biological sources. Biogeosciences, 15(13), 4147-4161

DOI https://doi.org/10.1594/PANGAEA.897898
Related Identifier https://doi.org/10.5194/bg-15-4147-2018
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.897898
Creator Lattaud, Julie ; Kirkels, Frédérique M S A ; Peterse, Francien ; Freymond, Chantal V; Eglinton, Timothy Ian ; Hefter, Jens ; Mollenhauer, Gesine (ORCID: 0000-0001-5138-564X); Balzano, Sergio ; Villanueva, Laura ; van der Meer, Marcel T J ; Hopmans, Ellen C ; Sinninghe Damsté, Jaap S ; Schouten, Stefan
Publisher PANGAEA
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (6.070W, 16.452S, 82.358E, 51.861N); Black Sea; Gulf of Bothnia, Baltic sea; Black Forest; Offshore Kobuleti; Kerch Strait; Karlsruhe, Baden-Württemberg, Southern Germany
Temporal Coverage Begin 2007-04-11T18:03:00Z
Temporal Coverage End 2007-04-19T10:19:00Z