Geochemistry of coastal wetland in the Northern Saharan environment through lacustrine sediment core THI

DOI

The core was collected manually from a boat employing a gravity core sampler. The core was sliced every two centimeters in the field, packed in individual identified plastics bags, and kept refrigerated. The THI sediment core (N 27°59.139, W 12°17.109), located in the inner portion of the Lagoon, was retrieved from a secondary channel, having 52 cm of length. The salinity measured at the site on the day of the sampling was 50 PSU, thus revealing a saline gradient that increases towards the upstream, probably due to a longer residence time of the water and consequent higher evaporation rate at that site. To its right side, the secondary channel is protected by a desert plateau, while to its left lays a saltmarsh area, occupied by specimens of the genus Salicornia sp., that are periodically exposed by tidal dynamics. A low marine influence characterizes this part of the Lagoon, depths between 2.70 m and 5.20 m, during low and high tides, respectively, and surrounded by extensive heterogeneous marshes. Aiming the recognition of the environmental changes at this point of the lagoon, we have performed the following measurements in the core's sediments: dating (210Pb and 137Cs calibration), sedimentation rate, mean grainsize, Chlorophyll, Total Organic Carbon (TOC), C/N, Sr/Ca and Si/Ti elemental ratios.

Identifier
DOI https://doi.org/10.1594/PANGAEA.925024
Related Identifier https://doi.org/10.1594/PANGAEA.925346
Related Identifier https://doi.org/10.1002/lno.11992
Related Identifier https://store.pangaea.de/Publications/Nogueira-etal_2020/Readme_Methoden.pdf
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.925024
Provenance
Creator Nogueira, Juliana ORCID logo; Evangelista, Heitor ORCID logo; Bouchaou, Lhoussaine; Moreira, Luciane Silva ORCID logo; Sifeddine, Abdelfettah ORCID logo; ElMouden, Ahmed; Msanda, Fouad; Caquineau, Sandrine ORCID logo; Briceño-Zuluaga, Francisco Javier ORCID logo; Licínio, Marcus Vinicius; Mandeng-Yogo, Magloire; Mendez-Millan, Mercedes; Cordeiro, Renato Campello (ORCID: 0000-0002-6785-601X); Knoppers, Bastiaan; Moreira-Ramírez, Manuel; Martins, Renato
Publisher PANGAEA
Publication Year 2020
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 414 data points
Discipline Earth System Research
Spatial Coverage (-12.285 LON, 27.986 LAT); Morocco