Quantification of Biodriven Transfer of Per- and Polyfluoroalkyl Substances from the Aquatic to the Terrestrial Environment via Emergent Insects
Emergent aquatic insects are important food subsidies to riparian food webs but can also transfer waterborne contaminants to the terrestrial environment. This study aimed to quantitatively assess this biodriven transfer for per- and polyfluoroalkyl substances (PFAS). Aquatic insect larvae, emergent...
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| Veröffentlicht in: | Environmental science & technology 2021-06, Vol.55 (12), p.7900-7909 |
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| creator | Koch, Alina Jonsson, Micael Yeung, Leo W. Y Kärrman, Anna Ahrens, Lutz Ekblad, Alf Wang, Thanh |
| description | Emergent aquatic insects are important food subsidies to riparian food webs but can also transfer waterborne contaminants to the terrestrial environment. This study aimed to quantitatively assess this biodriven transfer for per- and polyfluoroalkyl substances (PFAS). Aquatic insect larvae, emergent aquatic insects, terrestrial consumers, sediment, and water were collected from a contaminated lake and stream and an uncontaminated pond, and analyzed for PFAS and stable isotopes of carbon and nitrogen. Top predators in this study were spiders, which showed the highest average ∑24PFAS concentration of 1400 ± 80 ng g–1 dry weight (dw) at the lake and 630 ng g–1 dw at the stream. The transfer of PFAS from the lake to the riparian zone, via deposition of emergent aquatic insects, was 280 ng ∑24PFAS m–2 d–1 in 2017 and only 23 ng ∑24PFAS m–2 d–1 in 2018. Because of higher production of emergent aquatic insects, the lake had higher PFAS transfer and higher concentrations in terrestrial consumers compared to the stream, despite the stream having higher PFAS concentration in water and aquatic insect larvae. Our results indicate that biodriven transfer of PFAS from the aquatic systems and subsequent uptake in terrestrial food webs depend more on emergence amounts, i.e., aquatic prey availability, rather than on PFAS concentrations in water and aquatic prey. |
| doi_str_mv | 10.1021/acs.est.0c07129 |
| format | Article |
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Y ; Kärrman, Anna ; Ahrens, Lutz ; Ekblad, Alf ; Wang, Thanh</creator><creatorcontrib>Koch, Alina ; Jonsson, Micael ; Yeung, Leo W. Y ; Kärrman, Anna ; Ahrens, Lutz ; Ekblad, Alf ; Wang, Thanh ; Sveriges lantbruksuniversitet</creatorcontrib><description>Emergent aquatic insects are important food subsidies to riparian food webs but can also transfer waterborne contaminants to the terrestrial environment. This study aimed to quantitatively assess this biodriven transfer for per- and polyfluoroalkyl substances (PFAS). Aquatic insect larvae, emergent aquatic insects, terrestrial consumers, sediment, and water were collected from a contaminated lake and stream and an uncontaminated pond, and analyzed for PFAS and stable isotopes of carbon and nitrogen. Top predators in this study were spiders, which showed the highest average ∑24PFAS concentration of 1400 ± 80 ng g–1 dry weight (dw) at the lake and 630 ng g–1 dw at the stream. The transfer of PFAS from the lake to the riparian zone, via deposition of emergent aquatic insects, was 280 ng ∑24PFAS m–2 d–1 in 2017 and only 23 ng ∑24PFAS m–2 d–1 in 2018. Because of higher production of emergent aquatic insects, the lake had higher PFAS transfer and higher concentrations in terrestrial consumers compared to the stream, despite the stream having higher PFAS concentration in water and aquatic insect larvae. Our results indicate that biodriven transfer of PFAS from the aquatic systems and subsequent uptake in terrestrial food webs depend more on emergence amounts, i.e., aquatic prey availability, rather than on PFAS concentrations in water and aquatic prey.</description><identifier>ISSN: 0013-936X</identifier><identifier>ISSN: 1520-5851</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/acs.est.0c07129</identifier><identifier>PMID: 34029071</identifier><language>eng</language><publisher>Easton: American Chemical Society</publisher><subject>Aquatic environment ; Aquatic insects ; biodriven transfer ; Consumers ; Contaminants ; Contaminants in Aquatic and Terrestrial Environments ; emergent aquatic insects ; Environmental Sciences ; Food ; Food chains ; Food webs ; Insects ; Isotopes ; Lakes ; Larvae ; Miljövetenskap ; Perfluoroalkyl & polyfluoroalkyl substances ; PFAS ; Predators ; Prey ; Riparian land ; Spiders ; Stable isotopes ; Subsidies ; terrestrial consumers ; Terrestrial environments</subject><ispartof>Environmental science & technology, 2021-06, Vol.55 (12), p.7900-7909</ispartof><rights>2021 The Authors. 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Aquatic insect larvae, emergent aquatic insects, terrestrial consumers, sediment, and water were collected from a contaminated lake and stream and an uncontaminated pond, and analyzed for PFAS and stable isotopes of carbon and nitrogen. Top predators in this study were spiders, which showed the highest average ∑24PFAS concentration of 1400 ± 80 ng g–1 dry weight (dw) at the lake and 630 ng g–1 dw at the stream. The transfer of PFAS from the lake to the riparian zone, via deposition of emergent aquatic insects, was 280 ng ∑24PFAS m–2 d–1 in 2017 and only 23 ng ∑24PFAS m–2 d–1 in 2018. Because of higher production of emergent aquatic insects, the lake had higher PFAS transfer and higher concentrations in terrestrial consumers compared to the stream, despite the stream having higher PFAS concentration in water and aquatic insect larvae. 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| subjects | Aquatic environment Aquatic insects biodriven transfer Consumers Contaminants Contaminants in Aquatic and Terrestrial Environments emergent aquatic insects Environmental Sciences Food Food chains Food webs Insects Isotopes Lakes Larvae Miljövetenskap Perfluoroalkyl & polyfluoroalkyl substances PFAS Predators Prey Riparian land Spiders Stable isotopes Subsidies terrestrial consumers Terrestrial environments |
| title | Quantification of Biodriven Transfer of Per- and Polyfluoroalkyl Substances from the Aquatic to the Terrestrial Environment via Emergent Insects |
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