Survey of bioaccessible pyrethroid insecticides and sediment toxicity in urban streams of the northeast United States

Kara E. Huff Hartz, Samuel Nutile, Courtney Y. Fung, Federico L. Sinche, Patrick W. Moran, Peter C. Van Metre, Lisa H. Nowell, Michael J. Lydy

Research output: Contribution to journalArticle

Abstract

Pyrethroids are a class of widely-used insecticides that can be transported from terrestrial applications to aquatic systems via runoff and tend to sorb to organic carbon in sediments. Pyrethroid occurrence is detrimental to stream ecosystems due to toxicity to sediment-dwelling invertebrates which are particularly at risk of pyrethroid exposure in urban streams. In this work, 49 streams located in watersheds in the northeastern United States were surveyed for nine current-use pyrethroids using two extraction methods. Total sediment concentrations were determined by exhaustive chemical extraction, while bioaccessible concentrations were determined by single-point Tenax extraction. Total and bioaccessible pyrethroid concentrations were detected in 76% and 67% of the sites, and the average sum of pyrethroids was 232 ng/g organic carbon (OC) for total and 43.8 ng/g OC for bioaccessible pyrethroids. Bifenthrin was the most commonly detected pyrethroid in streambed sediments. Sediment toxicity was assessed using 10-d Hyalella azteca bioassays, and 28% and 15% of sediments caused a decrease in H. azteca biomass and survival, respectively. A temperature-based focused toxicity identification evaluation was used to assess pyrethroids as the causal factor for toxicity. The concentrations of pyrethroids was only weakly correlated with the degree of urban land use. Sediment toxicity was predicted by total and bioaccessible pyrethroid concentrations expressed as toxic units. This work suggests that bioaccessibility-based methods, such as Tenax extraction, can be a valuable tool in assessing sediment toxicity. A survey of urban streambed sediments collected from the northeastern U.S. showed that pyrethroid insecticides were present and bioaccessible at the majority of sites, and most of the sediments were not toxic according to 10-d amphipod bioassays.

Original languageEnglish (US)
Article number112931
JournalEnvironmental Pollution
Volume254
DOIs
StatePublished - Nov 1 2019

Fingerprint

Pyrethrins
Insecticides
Toxicity
Sediments
Organic carbon
Carbon
Bioassay
Poisons
Biological Assay
Surveys and Questionnaires
Amphipoda
New England
Invertebrates
Watersheds
Runoff
Land use
Biomass
Ecosystems
Ecosystem

All Science Journal Classification (ASJC) codes

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Huff Hartz, Kara E. ; Nutile, Samuel ; Fung, Courtney Y. ; Sinche, Federico L. ; Moran, Patrick W. ; Van Metre, Peter C. ; Nowell, Lisa H. ; Lydy, Michael J. / Survey of bioaccessible pyrethroid insecticides and sediment toxicity in urban streams of the northeast United States. In: Environmental Pollution. 2019 ; Vol. 254.
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abstract = "Pyrethroids are a class of widely-used insecticides that can be transported from terrestrial applications to aquatic systems via runoff and tend to sorb to organic carbon in sediments. Pyrethroid occurrence is detrimental to stream ecosystems due to toxicity to sediment-dwelling invertebrates which are particularly at risk of pyrethroid exposure in urban streams. In this work, 49 streams located in watersheds in the northeastern United States were surveyed for nine current-use pyrethroids using two extraction methods. Total sediment concentrations were determined by exhaustive chemical extraction, while bioaccessible concentrations were determined by single-point Tenax extraction. Total and bioaccessible pyrethroid concentrations were detected in 76{\%} and 67{\%} of the sites, and the average sum of pyrethroids was 232 ng/g organic carbon (OC) for total and 43.8 ng/g OC for bioaccessible pyrethroids. Bifenthrin was the most commonly detected pyrethroid in streambed sediments. Sediment toxicity was assessed using 10-d Hyalella azteca bioassays, and 28{\%} and 15{\%} of sediments caused a decrease in H. azteca biomass and survival, respectively. A temperature-based focused toxicity identification evaluation was used to assess pyrethroids as the causal factor for toxicity. The concentrations of pyrethroids was only weakly correlated with the degree of urban land use. Sediment toxicity was predicted by total and bioaccessible pyrethroid concentrations expressed as toxic units. This work suggests that bioaccessibility-based methods, such as Tenax extraction, can be a valuable tool in assessing sediment toxicity. A survey of urban streambed sediments collected from the northeastern U.S. showed that pyrethroid insecticides were present and bioaccessible at the majority of sites, and most of the sediments were not toxic according to 10-d amphipod bioassays.",
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Survey of bioaccessible pyrethroid insecticides and sediment toxicity in urban streams of the northeast United States. / Huff Hartz, Kara E.; Nutile, Samuel; Fung, Courtney Y.; Sinche, Federico L.; Moran, Patrick W.; Van Metre, Peter C.; Nowell, Lisa H.; Lydy, Michael J.

In: Environmental Pollution, Vol. 254, 112931, 01.11.2019.

Research output: Contribution to journalArticle

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