Tracing tetraether lipids from source to sink in the Rhône River system (NW Mediterranean)

Jung-Hyun Kim 1, 2 Wolfgang Ludwig 3 Roselyne Buscail 3 Denise Dorhout 2, 1 Jaap S. Sinninghe Damsté 2, 1
1 Faculty of Geosciences, Utrecht University
2 Department of Marine Organic Biogeochemistry
3 CEFREM - Centre de Formation et de Recherche sur les Environnements Méditérranéens
Abstract : In this study, we investigated soils and river suspended particulate matter (SPM) collected in the Rhône and its tributary basins as well as marine surface sediments taken in the Rhône prodelta (Gulf of Lions, NW Mediterranean). Thereby, we traced the signal of branched glycerol dialkyl glycerol tetraethers (brGDGTs) from the source to sink via the Rhône River and its tributaries and identified sources of brGDGTs in rivers and marine sediments. Soil pH rather than the mean annual air temperature (MAAT) explains most of the observed variances of the brGDGT distribution in our soil dataset. The observed changes in the distribution of brGDGTs in the river SPM indicate that brGDGTs brought by the river to the sea are primarily derived from the lower Rhône and its tributary soils, even though in situ production in the river itself cannot be excluded. In marine surface sediments, it appears that the input of riverine brGDGTs is the primary source of brGDGTs in the Rhône prodelta, although the brGDGT composition may be further modified by the in situ production in the marine environment. More work is required to assess fully whether brGDGTs can be used to reconstruct the terrestrial paleoenvironmental changes using marine sediment cores taken in the Rhône prodelta close to the river mouth.
Keywords : BIT MBT'/CBT Rhône River Gulf of Lions glycerol dialkyl glycerol tetraethers crenarchaeol
Type de document :
Article dans une revue
Frontiers in Earth Science, Frontiers Media, 2015, 3, 22 p. 〈10.3389/feart.2015.00022〉
Liste complète des métadonnées

Littérature citée [79 références]  Voir  Masquer  Télécharger
https://hal-univ-perp.archives-ouvertes.fr/hal-01169395
Contributeur : Olivier Savoyat <>
Soumis le : mercredi 15 juillet 2015 - 15:51:45
Dernière modification le : jeudi 11 janvier 2018 - 06:25:50
Document(s) archivé(s) le : vendredi 16 octobre 2015 - 10:11:13

Fichier

feart-03-00022.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

UNIV-PERP | AGROPOLIS

Citation

Jung-Hyun Kim, Wolfgang Ludwig, Roselyne Buscail, Denise Dorhout, Jaap S. Sinninghe Damsté. Tracing tetraether lipids from source to sink in the Rhône River system (NW Mediterranean). Frontiers in Earth Science, Frontiers Media, 2015, 3, 22 p. 〈10.3389/feart.2015.00022〉. 〈hal-01169395〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

257

Téléchargements de fichiers

105

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD