Plant wax biomarkers record from sediment core PEX19-01, Lake Peixão, Serra da Estrela, Portugal

These data comprise a downcore record (PEX19-01) of plant wax n-alkanes (concentration and compound-specific δ2H and δ13C isotopes) from 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. The lake covers an area of 0.02 km² with a maximum water depth of approximately 5 meters. Characterized as oligotrophic, slightly acidic, and monomictic, Lake Peixão's settings and location present an ideal setting for paleoenvironmental studies between Atlantic and Mediterranean-influenced climates. Sediment cores were collected at a depth of about 4 meters during a field campaign from June 10 to June 14, 2019, using a UWITEC© piston coring system from a floating platform, and a short core (PEX15-01C; 1.23 m long) using a UWITEC gravity coring system (see Moreno et al., 2023). According to the age model by Hernández et al., 2023, the studied section of the sediment core (upper 120 cm) spans the last 2000 years with a mean resolution of 30 ± 10 years for n-alkane samples.

This study aims to reconstruct past vegetation and climate dynamics in western Iberia and to address the lack of long-term climate data. It focuses on understanding the interactions between Mediterranean and Atlantic influences on Western Iberia during key climatic periods such as the Roman Period, Early Middle Ages, Medieval Climate Anomaly, Little Ice Age, and the Industrial Era to the present day. This knowledge is crucial for predicting future climate scenarios and understanding the adaptive responses of alpine ecosystems to climatic variability.

The sediment samples were collected every 2 cm, resulting in 60 samples weighing between 0.4 and 0.6 grams each. 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 (δ13C n-alk and δ2H n-alk) were conducted using gas chromatography-isotope ratio mass spectrometry (GC-IRMS) at MARUM, University of Bremen, Germany (see Santos et al., 2022).

Data and Resources

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Cite this as

Santos, Ricardo N, Rodrigues, Teresa, Naughton, Filipa, Schefuß, Enno, Oliveira, Dulce, Moreno, João, Raposeiro, Pedro Miguel, Gil-Romera, Graciela, Morgan, Alistair, Leira, M, Domingues Gomes, Sandra, Ladd, S N, Trigo, Ricardo M, Ramos, Alexandre M, Hernández, Armand (2024). Dataset: Plant wax biomarkers record from sediment core PEX19-01, Lake Peixão, Serra da Estrela, Portugal. https://doi.org/10.1594/PANGAEA.972149

DOI retrieved: 2024

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-4.0
Source https://doi.org/10.1594/PANGAEA.972149
Author Santos, Ricardo N
Given Name Ricardo N
Family Name Santos
More Authors
Rodrigues, Teresa
Naughton, Filipa
Schefuß, Enno
Oliveira, Dulce
Moreno, João
Raposeiro, Pedro Miguel
Gil-Romera, Graciela
Morgan, Alistair
Leira, M
Domingues Gomes, Sandra
Ladd, S N
Trigo, Ricardo M
Ramos, Alexandre M
Hernández, Armand
Source Creation 2024
Publication Year 2024
Resource Type text/tab-separated-values - filename: PEX19-01_plant_wax_biomarkers
Subject Areas
Name: Chemistry

Name: LandSurface

Name: Lithosphere

Related Identifiers
Title: Understanding the Atlantic influence on climate and vegetation dynamics in western Iberia over the last 2000 years
Identifier: https://doi.org/10.1016/j.quascirev.2024.108796
Type: DOI
Relation: References
Year: 2024
Source: Quaternary Science Reviews
Authors: 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 .