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Aquatic occurrence of phytotoxins in small streams triggered by biogeography, vegetation growth ...

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GUNTHARDT, Barbara F., Juliane HOLLENDER, Martin SCHERINGER, Konrad HUNGERBUHLER, Mulatu Y. NANUSHA, Werner BRACK and Thomas D. BUCHELI. Aquatic occurrence of phytotoxins in small streams triggered by biogeography, vegetation growth stage, and precipitation. Science of the Total Environment. Amsterdam: Elsevier Science, 2021, vol. 798, December 2021, p. 1-11. ISSN 0048-9697. doi:10.1016/j.scitotenv.2021.149128.
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Original name Aquatic occurrence of phytotoxins in small streams triggered by biogeography, vegetation growth stage, and precipitation
Authors GUNTHARDT, Barbara F., Juliane HOLLENDER, Martin SCHERINGER, Konrad HUNGERBUHLER, Mulatu Y. NANUSHA, Werner BRACK and Thomas D. BUCHELI.
Edition Science of the Total Environment, Amsterdam, Elsevier Science, 2021, 0048-9697.
Other information
Original language English
Type of outcome Article in a journal
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW URL
Organization Přírodovědecká fakulta - Repository
Doi http://dx.doi.org/10.1016/j.scitotenv.2021.149128
UT WoS 000701750700002
Keywords in English Phytotoxins; poisonous plants; Surface water contamination; High resolution mass spectrometry screening; Persistence; mobility; toxicity characterization
Links EF15_003/0000469, research and development project. LM2018121, research and development project.
Changed by Changed by: RNDr. Daniel Jakubík, učo 139797. Changed: 25/11/2021 02:20.
Abstract
Toxic plant secondary metabolites (PSMs), so-called phytotoxins, occur widely in plant species. Many of these phytotoxins have similar mobility, persistence, and toxicity properties in the environment as anthropogenic micropollutants, which increasingly contaminate surface waters. Although recent case studies have shown the aquatic relevance of phytotoxins, the overall exposure remains unknown. Therefore, we performed a detailed occurrence analysis covering 134 phytotoxins from 27 PSM classes. Water samples from seven small Swiss streams with catchment areas from 1.7 to 23 km(2) and varying land uses were gathered over several months to investigate seasonal impacts. They were complemented with samples from different biogeographical regions to cover variations in vegetation. A broad SPE-LC-HRMS/MS method was applied with limits of detection below 5 ng/L for over 80% of the 134 included phytotoxins. In total, we confirmed 39 phytotoxins belonging to 13 PSM classes, which corresponds to almost 30% of all included phytotoxins. Several alkaloids were regularly detected in the low ng/L-range, with average detection frequencies of 21%. This is consistent with the previously estimated persistence and mobility properties that indicated a high contamination potential. Coumarins were previously predicted to be unstable, however, detection frequencies were around 89%, and maximal concentrations up to 90 ng/L were measured for fraxetin produced by various trees. Overall, rainy weather conditions at full vegetation led to the highest total phytotoxin concentrations, which might potentially be most critical for aquatic organisms.
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  • a concrete person Mgr. Lucie Vařechová, uco 106253
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  • a concrete person Mgr. Jolana Surýnková, uco 220973
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