High-resolution historical record of plant protection product deposition documented by target and nontarget trend analysis in a Swiss lake under anthropogenic pressure

Chiaia-Hernández, Aurea C.; Zander, Paul; Schneider, Tobias; Szidat, Sönke; Lloren, Ronald; Grosjean, Martin (2020). High-resolution historical record of plant protection product deposition documented by target and nontarget trend analysis in a Swiss lake under anthropogenic pressure. Environmental science & technology, 54(20), pp. 13090-13100. ACS Publications 10.1021/acs.est.0c04842

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A multiproxy workflow was used to assess >60 plant protection products (PPPs) in sediment samples from a Swiss lake under heavy agricultural pressure. The results show the appearance of PPPs for the first time in the early 1960s with an overall detection of 34 PPPs and with herbicides and fungicides found in equal proportions. Paleolimnological data [e.g., chronology, hyperspectral imaging of sedimentary green pigments, and semiquantitative elemental composition (μXRF scans)] suggest that PPP concentrations and fluxes to the sediment over time are not related to land surface processes such as soil erosion or lake biogeochemistry but are attributed mainly to PPP application (inferred from sales) or regulatory measures (bans). Additional compounds with similar sources of contamination as the target PPPs captured by nontarget trend analysis (≥2000 unknown profiles) reveal significant inputs of contaminants to the lake starting in the 1970s, followed by a decrease of contamination at the beginning of the 1990s and a constant increase by ∼28% of the unknown compounds since the year 2000. An ecological risk assessment conducted on detected PPPs indicates that since the 1980s, the sediment quality is insufficient with risk quotient values displaying maximum levels in the most recent sediments (∼2010) despite bans of specific PPPs and environmental regulations.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleolimnology
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Chiaia-Hernández, Aurea; Zander, Paul David; Schneider, Tobias; Szidat, Sönke and Grosjean, Martin

Subjects:

500 Science > 540 Chemistry
500 Science > 550 Earth sciences & geology
900 History > 910 Geography & travel

ISSN:

0013-936X

Publisher:

ACS Publications

Language:

English

Submitter:

Giulia Luise Wienhues

Date Deposited:

05 Oct 2020 10:19

Last Modified:

18 Sep 2021 02:30

Publisher DOI:

10.1021/acs.est.0c04842

BORIS DOI:

10.7892/boris.146822

URI:

https://boris.unibe.ch/id/eprint/146822

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