Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/10662
DC Field | Value | Language |
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dc.contributor.author | Zech M. | en_US |
dc.contributor.author | Pedentchouk N. | en_US |
dc.contributor.author | Buggle B. | en_US |
dc.contributor.author | Leiber K. | en_US |
dc.contributor.author | Kalbitz K. | en_US |
dc.contributor.author | Marković, Slobodan | en_US |
dc.contributor.author | Glaser B. | en_US |
dc.date.accessioned | 2020-03-03T14:40:43Z | - |
dc.date.available | 2020-03-03T14:40:43Z | - |
dc.date.issued | 2011-09-01 | - |
dc.identifier.issn | 00167037 | en_US |
dc.identifier.uri | https://open.uns.ac.rs/handle/123456789/10662 | - |
dc.description.abstract | During the last decade, compound-specific hydrogen isotope analysis of plant leaf-wax and sedimentary n-alkyl lipids has become a promising tool for paleohydrological reconstructions. However, with the exception of several previous studies, there is a lack of knowledge regarding possible effects of early diagenesis on the δD values of n-alkanes. We therefore investigated the n-alkane patterns and δD values of long-chain n-alkanes from three different C3 higher plant species (Acer pseudoplatanus L., Fagus sylvatica L. and Sorbus aucuparia L.) that have been degraded in a field leaf litterbag experiment for 27. months.We found that after an initial increase of long-chain n-alkane masses (up to ~50%), decomposition took place with mean turnover times of 11.7months. Intermittently, the masses of mid-chain n-alkanes increased significantly during periods of highest total mass losses. Furthermore, initially high odd-over-even predominances (OEP) declined and long-chain n-alkane ratios like n-C31/C27 and n-C31/C29 started to converge to the value of 1. While bulk leaf litter became systematically D-enriched especially during summer seasons (by ~8‰ on average over 27months), the δD values of long-chain n-alkanes reveal no systematic overall shifts, but seasonal variations of up to 25‰ (Fagus, n-C27, average ~13‰).Although a partly contribution by leaf-wax n-alkanes by throughfall cannot be excluded, these findings suggest that a microbial n-alkane pool sensitive to seasonal variations of soil water δD rapidly builds up. We propose a conceptual model based on an isotope mass balance calculation that accounts for the decomposition of plant-derived n-alkanes and the build-up of microbial n-alkanes. Model results are in good agreement with measured n-alkane δD results. Since microbial 'contamination' is not necessarily discernible from n-alkane concentration patterns alone, care may have to be taken not to over-interpret δD values of sedimentary n-alkanes. Furthermore, since leaf-water is generally D-enriched compared to soil and lake waters, soil and water microbial n-alkane pools may help explain why soil and sediment n-alkanes are D-depleted compared to leaves. © 2011 Elsevier Ltd. | en |
dc.relation.ispartof | Geochimica et Cosmochimica Acta | en |
dc.title | Effect of leaf litter degradation and seasonality on D/H isotope ratios of n-alkane biomarkers | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.doi | 10.1016/j.gca.2011.06.006 | - |
dc.identifier.scopus | 2-s2.0-79961170323 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/79961170323 | - |
dc.description.version | Unknown | en_US |
dc.relation.lastpage | 4928 | en |
dc.relation.firstpage | 4917 | en |
dc.relation.issue | 17 | en |
dc.relation.volume | 75 | en |
item.grantfulltext | none | - |
item.fulltext | No Fulltext | - |
crisitem.author.dept | Prirodno-matematički fakultet, Departman za geografiju, turizam i hotelijerstvo | - |
crisitem.author.orcid | 0000-0002-4977-634X | - |
crisitem.author.parentorg | Prirodno-matematički fakultet | - |
Appears in Collections: | PMF Publikacije/Publications |
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