RT Journal Article
T1 A Two-Part Harmony: Changes in Peat Molecular Composition in Two Cores from an Ombrotrophic Peatland (Tremoal do Pedrido, Xistral Mountains, NW Spain)
A1 Martínez Cortizas, Antonio
A1 Francos Golán, Ainé
A1 Traoré, Mohamed
A1 López Costas, Olalla
K1 FTIR-ATR
K1 Raised bog
K1 Peat organic matter
AB In peat research, the question often arises as to how similar/different the records of cores collected in the same mire are. This has been addressed for some metals (e.g., Pb and Hg), but the question remains open for the molecular composition of organic matter (pOM). Here, we explore this issue by analysing two cores from a raised bog, combining FTIR-ATR, mid-infrared (MIR) indices, and principal component analysis (PCA), and support the interpretation with multilinear regression (MLR) modelling of peat physical (colour) and elemental (C, N, and C/N) properties. The MIR indices and principal components showed depth patterns mainly related to long- and short-term peat decomposition, as well as other secondary changes involving some compounds (e.g., lignin). The depth records of the two cores are remarkably similar, indicating they were synchronously affected by the same processes and to almost the same degree. Cellulose crystallinity was the only property that showed differences in intensity. The good-to-excellent fitting of the MLR models supports the usefulness of FTIR-ATR in peat research. Further studies in a larger number of cores, from the same peatland and from different types of peatlands, are needed to better understand the spatio-temporal responses of the pOM and the factors involved.
PB MDPI
YR 2025
FD 2025-02-12
LK https://hdl.handle.net/10347/46625
UL https://hdl.handle.net/10347/46625
LA eng
NO Cortizas, A. M., Golan, A. F., Traore, M., & Lopez-Costas, O. (2025). A Two-Part Harmony: Changes in Peat Molecular Composition in Two Cores from an Ombrotrophic Peatland (Tremoal do Pedrido, Xistral Mountains, NW Spain). SOIL SYSTEMS, 9(1). https://doi.org/10.3390/SOILSYSTEMS9010014
NO This research was funded by the Grupos de Referencia Competitiva (ED431C 2021/32, Xunta de Galicia) and European Union (ERC Consolidator Grant, PollutedPast, 101087832). The views and opinions expressed are, however, those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. The OLC is funded by Ramón y Cajal 2020 (RYC2020-030531-I).
DS Minerva
RD 23 abr 2026