Geochemical parameters determined in sediment cores from Lake Burgäschi, Switzerland
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2019
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| _version_ | 1867169517031915520 |
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| author | Tu, Luyao Zander, Paul D Szidat, Sönke Lloren, Ronald Grosjean, Martin |
| author_facet | Tu, Luyao Zander, Paul D Szidat, Sönke Lloren, Ronald Grosjean, Martin |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_908896 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemical parameters determined in sediment cores from Lake Burgäschi, Switzerland Tu, Luyao Zander, Paul D Szidat, Sönke Lloren, Ronald Grosjean, Martin Burg17-B; deep lakes; eutrophication; GCUWI; Gravity corer, UWITEC; hypolimnetic anoxia; hypolimnetic withdrawal; Lake Burgäschi, Switzerland; Phosphorus fractions 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. |
| title | Geochemical parameters determined in sediment cores from Lake Burgäschi, Switzerland |
| topic | Burg17-B; deep lakes; eutrophication; GCUWI; Gravity corer, UWITEC; hypolimnetic anoxia; hypolimnetic withdrawal; Lake Burgäschi, Switzerland; Phosphorus fractions |
| url | https://doi.org/10.1594/PANGAEA.908896 |