9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR-ATR
Por favor, use este identificador para citas ou ligazóns a este ítem:
http://hdl.handle.net/10347/26626
Ficheiros no ítem
Metadatos do ítem
Título: | 9000 years of changes in peat organic matter composition in Store Mosse (Sweden) traced using FTIR-ATR |
Autor/a: | Martínez Cortizas, Antonio Manuel Sjöström, Jenny K. Ryberg, Eleonor E. Kylander, Malin E. Kaal, Joeri López Costas, Olalla Álvarez Fernández, Noemí Bindler, Richard |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Edafoloxía e Química Agrícola |
Data: | 2021 |
Editor: | Wiley |
Resumo: | Store Mosse (the ‘Great Bog’ in Swedish) is one of the most extensive bog complexes in southern Sweden (~77 km2), where pioneering palaeoenvironmental research has been carried out since the early 20th century. This includes, for example, vegetation changes, carbon and nitrogen dynamics, peat decomposition, atmospheric metal pollution, mineral dust deposition, dendrochronology, and tephrochronology. Even though organic matter (OM) represents the bulk of the peat mass and its compositional change has the potential to provide crucial ecological information on bog responses to environmental factors, peat OM molecular composition has not been addressed in detail. Here, a 568-cm-deep peat sequence was studied at high resolution, by attenuated reflectance Fourier-transform infrared spectroscopy (FTIR-ATR) in the mid-infrared region (4000–400 cm–1). Principal components analysis was performed on selected absorbances and change-point modelling was applied to the records to determine the timing of changes. Four components accounted for peat composition: (i) depletion/accumulation of labile (i.e. carbohydrates) and recalcitrant (i.e. lignin and other aromatics, aliphatics, organic acids and some N compounds) compounds, due to peat decomposition; (ii) variations in N compounds and carbohydrates; (iii) residual variation of lignin and organic acids; and (iv) residual variation of aliphatic structures. Peat decomposition showed two main patterns: a long-term trend highly correlated to peat age (r = 0.87), and a short-term trend, which showed five main phases of increased decomposition (at ~8.4–8.1, ~7.0–5.6, ~3.5–3.1, ~2.7–2.1 and ~1.6–1.3 ka) – mostly corresponding to drier climate and its effect on bog hydrology. The high peat accumulation event (~5.6–3.9 ka), described in earlier studies, is characterized by the lowest degree of peat decomposition of the whole record. Given that FTIR-ATR is a quick, non-destructive, cost-effective technique, our results indicate that it can be applied in a systematic way (including multicore studies) to peat research and provide relevant information on the evolution of peatlands |
Versión do editor: | https://doi.org/10.1111/bor.12527 |
URI: | http://hdl.handle.net/10347/26626 |
DOI: | 10.1111/bor.12527 |
E-ISSN: | 1502-3885 |
Dereitos: | © 2021 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
Coleccións
-
- EQA-Artigos [207]
O ítem ten asociados os seguintes ficheiros de licenza:
A licenza do ítem descríbese como
© 2021 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made
© 2021 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made