Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Tu, Luyao; Zander, Paul D; Szidat, Sönke; Lloren, Ronald; Grosjean, Martin (2019): Geochemical parameters determined in sediment cores from Lake Burgäschi, Switzerland [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.908896

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2019-11-22 • DOI registered: 2020-04-20

RIS CitationBibTeX Citation ShareShow MapGoogle Earth

Abstract:
Sediment phosphorus (P) released to surface water (a.k.a. internal P loading) is the key factor delaying lake recovery from eutrophication in many lakes. The sediment P availability and release risk into lake water can be largely evaluated by P fractions in sediments. In deep eutrophic lakes, hypolimnetic anoxia is suggested to prompt sediment-P mobility and potentially increase internal P loading on short term. However, the long-term effects hypolimnetic redox conditions and trophic state on sedimentary P-fraction retention in deep lakes are not clear.
In this study we investigated two sediment cores retrieved from the deepest part of Lake Burgäschi, Switzerland. The age-depth profile based on 210Pb and 137Cs chronology dates back to the early 1900s. Sedimentary green-pigments (chlorophylls and diagenetic products) inferred from hyperspectral imaging (HSI) scanning and X-ray fluorescence (XRF)-inferred Fe/Mn ratios primarily reflect lake trophic state evolution (aquatic primary productivity) and hypolimnetic oxygenation, respectively. A sequential P-extraction with five P fractions was performed to uncover P fractionation in sediment profiles. In addition, we measured the sediment bulk elements of carbon, nitrogen and sulfur. The temporal records of P fractions concentrations and net burial rates (NBR) in sediments were investigated.
Keyword(s):
deep lakes; eutrophication; hypolimnetic anoxia; hypolimnetic withdrawal; Phosphorus fractions
Supplement to:
Tu, Luyao; Zander, Paul D; Szidat, Sönke; Lloren, Ronald; Grosjean, Martin (2020): The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland. Biogeosciences, 17, 2715–2729, https://doi.org/10.5194/bg-17-2715-2020
Coverage:
Latitude: 47.169060 * Longitude: 7.668140
Event(s):
Burg17-B * Latitude: 47.169060 * Longitude: 7.668140 * Lake water depth: 31 m * Recovery: 0.75 m * Location: Lake Burgäschi, Switzerland * Method/Device: Gravity corer, UWITEC (GCUWI) * Comment: Deepest point of the lake, September 2017
License:
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC-BY-NC-SA-4.0)
Size:
7 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Tu, L; Zander, PD; Szidat, S et al. (2019): 210Pb chronology of sediment core Burg17-B. https://doi.org/10.1594/PANGAEA.908893
  2. Tu, L; Zander, PD; Szidat, S et al. (2019): RABD index of core Burg17-B. https://doi.org/10.1594/PANGAEA.908894
  3. Tu, L; Zander, PD; Szidat, S et al. (2019): Radionuclides of core Burg17-B. https://doi.org/10.1594/PANGAEA.908898
  4. Tu, L; Zander, PD; Szidat, S et al. (2019): XRF element data of core Burg17-B. https://doi.org/10.1594/PANGAEA.908895
  5. Tu, L; Zander, PD; Szidat, S et al. (2019): Correlation of sediment cores Burg17-C and Burg17-B. https://doi.org/10.1594/PANGAEA.909046
  6. Tu, L; Zander, PD; Szidat, S et al. (2019): Phosphorus flux of sediment core Burg17-C. https://doi.org/10.1594/PANGAEA.909851
  7. Tu, L; Zander, PD; Szidat, S et al. (2019): Phosphorus fractions of core Burg17-C. https://doi.org/10.1594/PANGAEA.909044