Articles | Volume 22, issue 4
https://doi.org/10.5194/bg-22-831-2025
https://doi.org/10.5194/bg-22-831-2025
Research article
 | 
18 Feb 2025
Research article |  | 18 Feb 2025

Locally produced leaf wax biomarkers in the high-altitude Areguni Mountains outweigh downstream transport

Alex Brittingham, Michael T. Hren, Samuel Spitzschuch, Phil Glauberman, Yonaton Goldsmith, Boris Gasparyan, and Ariel Malinsky-Buller

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Cited articles

Alewell, C., Birkholz, A., Meusburger, K., Schindler Wildhaber, Y., and Mabit, L.: Quantitative sediment source attribution with compound-specific isotope analysis in a C3 plant-dominated catchment (central Switzerland), Biogeosciences, 13, 1587–1596, https://doi.org/10.5194/bg-13-1587-2016, 2016. 
Bliedtner, M., Schäfer, I. K., Zech, R., and Von Suchodoletz, H.: Leaf wax n-alkanes in modern plants and topsoils from eastern Georgia (Caucasus) – Implications for reconstructing regional paleovegetation, Biogeosciences, 15, 3927–3936, https://doi.org/10.5194/bg-15-3927-2018, 2018. 
Brittingham, A., Hren, M., and Hartman, G.: Microbial alteration of the hydrogen and carbon isotopic composition of n-alkanes in sediments, Org. Geochem., 107, 1–8, https://doi.org/10.1016/j.orggeochem.2017.01.010, 2017. 
Brittingham, A., Hren, M. T., Hartman, G., Wilkinson, K. N., Mallol, C., Gasparyan, B., and Adler, D. S.: Geochemical Evidence for the Control of Fire by Middle Palaeolithic Hominins, Sci. Rep., 9, 15368, https://doi.org/10.1038/s41598-019-51433-0, 2019a. 
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Plant molecules, also called biomarkers, are a tool used for reconstructing climates in the past. In this study, we collected soils and stream sediments in a river catchment in Armenia in order to determine how these molecules move before deposition. We found that trees and grasses produce distinct biomarkers, but these are not incorporated equally into stream sediments. Instead, biomarkers from deciduous trees overprint any upstream transport of grass biomarkers.
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