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dc.contributor.authorHeidke, Inkenen_NZ
dc.contributor.authorHartland, Adamen_NZ
dc.contributor.authorScholz, Denisen_NZ
dc.contributor.authorPearson, Andrewen_NZ
dc.contributor.authorHellstrom, John C.en_NZ
dc.contributor.authorBreitenbach, Sebastian F.M.en_NZ
dc.contributor.authorHoffmann, Thorstenen_NZ
dc.date.accessioned2021-04-09T02:19:17Z
dc.date.available2021-04-09T02:19:17Z
dc.date.issued2021
dc.identifier.citationHeidke, I., Hartland, A., Scholz, D., Pearson, A., Hellstrom, J., Breitenbach, S. F. M., & Hoffmann, T. (2021). Lignin oxidation products in soil, dripwater and speleothems from four different sites in New Zealand. Biogeosciences, 18(7), 2289–2300. https://doi.org/10.5194/bg-18-2289-2021en
dc.identifier.urihttps://hdl.handle.net/10289/14226
dc.description.abstractLignin oxidation products (LOPs) are widely used as vegetation proxies in climate archives, such as sediment and peat cores. The total LOP concentration, Σ8, provides information on the abundance of vegetation, while the ratios C/V and S/V of the different LOP groups also provide information on the type of vegetation. Recently, LOP analysis has been successfully applied to speleothem archives. However, there are many open questions concerning the transport and microbial degradation of LOPs on their way from the soil into the cave system. These processes could potentially alter the original source-dependent LOP signals, in particular the C/V and S/V ratios, and thus complicate their interpretation in terms of past vegetation changes. We analyzed LOPs in leaf litter and different soil horizons as well as dripwater and flowstone samples from four different cave sites from different vegetation zones in New Zealand using ultrahigh-performance liquid chromatography coupled to high-resolution mass spectrometry. We test whether the original source-dependent LOP signal of the overlying vegetation is preserved and can be recovered from flowstone samples and investigate how the signal is altered by the transport from the soil to the cave. The LOP concentrations range from mg g−1 in the soil to ng g−1 in the flowstones. Our results demonstrate that, from the soil to the flowstone, the C/V and S/V ratios both increase, while the total lignin content, Σ8, strongly decreases. This shows that the LOP signal is strongly influenced by both transport and degradation processes. Nevertheless, the relative LOP signal from the overlying soil at the different cave sites is preserved in the flowstone. We emphasize that for the interpretation of C/V and S/V ratios in terms of past vegetation changes, it is important to compare only samples of the same type (e.g., speleothem, dripwater or soil) and to evaluate only relative variations.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoenen_NZ
dc.publisherCopernicus GmbHen_NZ
dc.relation.urihttps://bg.copernicus.org/articles/18/2289/2021/
dc.rights© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
dc.titleLignin oxidation products in soil, dripwater and speleothems from four different sites in New Zealanden_NZ
dc.typeJournal Article
dc.identifier.doi10.5194/bg-18-2289-2021en_NZ
dc.relation.isPartOfBiogeosciencesen_NZ
pubs.begin-page2289
pubs.elements-id260307
pubs.end-page2300
pubs.issue7en_NZ
pubs.publication-statusPublished onlineen_NZ
pubs.volume18en_NZ
dc.identifier.eissn1726-4189en_NZ


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