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Fernández-Pérez, Uxía; Santos, Ricardo N; Rodrigues, Teresa; Schefuß, Enno; Bao, Roberto; Raposeiro, Pedro Miguel; Sáez, Alberto; Giralt, Santiago; Martín-Puertas, Celia; Francus, Pierre; Trigo, Ricardo M; Ramos, Alexandre M; Hernández, Armand: Concentrations and compound-specific hydrogen (δ²H) and carbon (δ¹³C) isotope compositions of plant wax n-alkanes from sediment core PEX19-01, Lake Peixão, Serra da Estrela, Portugal [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993909 (dataset in review)

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Abstract:
This dataset contains compound-specific hydrogen (δ²H) and carbon (δ¹³C) isotope compositions and concentrations of plant wax n-alkanes from the PEX19-01 sediment record of Lake Peixão (40°20'35'' N, 7°36'19'' W), a small alpine lake located at 1677 meters above sea level in the Serra da Estrela Mountain, Portugal. Sediment cores were retrieved in June 2019 using a UWITEC piston coring system (Hernández et al., 2023). We adopt the age-depth model published by Hernández et al. (2023), which indicates continuous sedimentation over the past ~11,100 years. We present concentrations and compound-specific hydrogen (δ²H n-alk) and carbon (δ¹³C n-alk) isotope compositions of plant-wax n-alkanes from 75 sediment samples between 149 and 730 cm depth (~2.2–11.1 cal. ka BP), sub-sampled at variable intervals (2, 4, 8, 12, 16, and 20 cm) to optimise temporal resolution and stratigraphic coverage. These data extend the record previously published by Santos et al. (2024), which covers the uppermost 149 cm (~0–2.2 cal. ka BP). Plant-wax n-alkanes were extracted and analyzed at the BioGeoChemistry Lab, IPMA in Lisbon, Portugal. The total lipid extracts underwent various purification and analysis steps, including ultrasonic bath extraction, hydrolysis with potassium hydroxide in methanol, and separation using silica gel columns. Concentrations were measured using gas chromatography with flame ionization detection (GC-FID). Compound-specific isotope analyses were conducted using gas chromatography-isotope ratio mass spectrometry (GC-IRMS) at MARUM, University of Bremen, Germany (see Santos et al., 2022). The dataset was generated to reconstruct past hydroclimate and vegetation dynamics in Western Iberia.
Keyword(s):
Biomarkers; bulk organic matter; d13C; d2H; Holocene; Lake Peixão; Lake sediment core; leaf waxes; lipid biomarkers; Mediterranean mountain; mountain lakes; n-alkanes; North Atlantic; Organic Geochemistry; Paleoclimate; plant waxes; Portugal; Serra da Estrela; Stable carbon and hydrogen isotopes of plant-waxes; TN; TOC; Western Iberia; XRF core scanner data; δ13Corg; δ15N
References:
Hernández, Armand; Sáez, Alberto; Santos, Ricardo N; Rodrigues, Teresa; Martín-Puertas, Celia; Gil-Romera, Graciela; Abbott, Mark; Carballeira, Rafael; Costa, Pedro; Giralt, Santiago; Gomes, Sandra D; Griffore, Melissa; Ibañez-Insa, Jordi; Leira, M; Moreno, João; Naughton, Filipa; Oliveira, Dulce; Raposeiro, Pedro Miguel; Trigo, Ricardo M; Vieira, Gonçalo; Ramos, Alexandre M (2023): The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal). Earth Surface Processes and Landforms, esp.5536, https://doi.org/10.1002/esp.5536
Santos, Ricardo N; Rodrigues, Teresa; Naughton, Filipa; Schefuß, Enno; Oliveira, Dulce; Moreno, João; Raposeiro, Pedro Miguel; Gil-Romera, Graciela; Morgan, Alistair; Leira, M; Gomes, Sandra D; Ladd, S N; Trigo, Ricardo M; Ramos, Alexandre M; Hernández, Armand (2024): Understanding the Atlantic influence on climate and vegetation dynamics in western Iberia over the last 2000 years. Quaternary Science Reviews, 337, 108796, https://doi.org/10.1016/j.quascirev.2024.108796
Santos, Ricardo N; Schefuß, Enno; Cordeiro, Lívia Gebara M S; Oliveira, Dulce; Hernández, Armand; Ramos, Alexandre M; Rodrigues, Teresa (2022): Leaf wax biomarkers of a high-mountain lake area in western iberia—Implications for environmental reconstructions. Frontiers in Environmental Science, 10, 994377, https://doi.org/10.3389/fenvs.2022.994377
Funding:
European Multidisciplinary Seafloor and water column Observatory (EMSO-ERIC), grant/award no. PINFRA/22157/2016-EMSO-PT
Fundação para a Ciência e Tecnologia (FCT), grant/award no. PTDC/CTA‐GEO/29029/2017: HOLMODRIVE
Fundação para a Ciência e Tecnologia (FCT), grant/award no. UIDB/04326/2020: Centro de Ciências do Mar (CCMAR)
Coverage:
Latitude: 40.343044 * Longitude: -7.605371
Date/Time Start: 2019-06-10T00:00:00 * Date/Time End: 2019-06-10T00:00:00
Minimum DEPTH, sediment/rock: 1.22 m * Maximum DEPTH, sediment/rock: 7.30 m
Event(s):
PEX19-01 * Latitude: 40.343044 * Longitude: -7.605371 * Date/Time: 2019-06-10T00:00:00 * Elevation: 1677.0 m * Lake water depth: 5 m * Method/Device: Gravity corer, UWITEC (GCUWI)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelFernández-Pérez, Uxía
2DEPTH, sediment/rockDepth sedmFernández-Pérez, UxíaGeocode
3Calendar ageCal ageka BPFernández-Pérez, UxíaAge, calibrated1950 CE
4n-Alkane C17C17ng/gFernández-Pérez, Uxía
5n-Alkane C18C18ng/gFernández-Pérez, Uxía
6n-Alkane C19C19ng/gFernández-Pérez, Uxía
7n-Alkane C20C20ng/gFernández-Pérez, Uxía
8n-Alkane C21C21ng/gFernández-Pérez, Uxía
9n-Alkane C22C22ng/gFernández-Pérez, Uxía
10n-Alkane C23C23ng/gFernández-Pérez, Uxía
11n-Alkane C24C24ng/gFernández-Pérez, Uxía
12n-Alkane C25C25ng/gFernández-Pérez, Uxía
13n-Alkane C26C26ng/gFernández-Pérez, Uxía
14n-Alkane C27C27ng/gFernández-Pérez, Uxía
15n-Alkane C28C28ng/gFernández-Pérez, Uxía
16n-Alkane C29C29ng/gFernández-Pérez, Uxía
17n-Alkane C30C30ng/gFernández-Pérez, Uxía
18n-Alkane C31C31ng/gFernández-Pérez, Uxía
19n-Alkane C32C32ng/gFernández-Pérez, Uxía
20n-Alkane C33C33ng/gFernández-Pérez, Uxía
21n-Alkane C34C34ng/gFernández-Pérez, Uxía
22n-Alkane C35C35ng/gFernández-Pérez, Uxía
23n-Alkane C25, δDC25 δD‰ SMOWFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
24n-Alkane C26, δD, standard deviationC26 δD std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
25n-Alkane C27, δDC27 δD‰ SMOWFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
26n-Alkane C27, δD, standard deviationC27 δD std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
27n-Alkane C29, δDC29 δD‰ SMOWFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
28n-Alkane C29, δD, standard deviationC29 δD std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
29n-Alkane C31, δDC31 δD‰ SMOWFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
30n-Alkane C31, δD, standard deviationC31 δD std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
31n-Alkane C33, δDC33 δD‰ SMOWFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
32n-Alkane C33, δD, standard deviationC33 δD std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
33n-Alkane C25, δ13CC25 δ13C‰ PDBFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
34n-Alkane C25, δ13C, standard deviationC25 δ13C std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
35n-Alkane C27, δ13CC27 δ13C‰ PDBFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
36n-Alkane C27, δ13C, standard deviationC27 δ13C std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
37n-Alkane C29, δ13CC29 δ13C‰ PDBFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
38n-Alkane C29, δ13C, standard deviationC29 δ13C std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
39n-Alkane C31, δ13CC31 δ13C‰ PDBFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
40n-Alkane C31, δ13C, standard deviationC31 δ13C std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
41n-Alkane C31, δ13CC31 δ13C‰ PDBFernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
42n-Alkane C31, δ13C, standard deviationC31 δ13C std dev±Fernández-Pérez, UxíaGas chromatography - isotope ratio mass spectrometry (GC-IRMS)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2609 data points

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