Potentially toxic concentrations of synthetic pyrethroids associated with low density residential land use

Stephen Marshall, David Sharley, Katherine Jeppe, Simon Sharp, Gavin Rose, Vincent Pettigrove

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runoff, concentrations of emerging chemicals of concern were determined in sediments from 99 urban wetlands in and around Melbourne, Australia between February and April, 2015. As a preliminary estimation of potential risks to aquatic biota, we compared measured concentrations with thresholds for acute and chronic toxicity, and modeled toxic units as a function of demographic and land use trends. The synthetic pyrethroid insecticide bifenthrin was common and widespread, and frequently occurred at concentrations likely to cause toxicity to aquatic life. Personal care products DEET and triclosan were common and widely distributed, while the herbicides diuron and prometryn, and the fungicides pyrimethanil and trifloxystrobin occurred less frequently. Toxic unit modeling using random forests found complex and unexpected associations between urban land uses and trace organic concentrations. Synthetic pyrethroid insecticides were identified as emerging compounds of concern, particularly bifenthrin. In contrast with previous surveys, the highest bifenthrin concentrations were associated with lower housing and population density, implicating low-density residential land use in bifenthrin contamination. We discuss the implications for pesticide regulation and urban wetland management in a global context.
Original languageEnglish
Article number75
Number of pages13
JournalFrontiers in Environmental Science
Volume4
DOIs
Publication statusPublished - 22 Nov 2016
Externally publishedYes

Keywords

  • synthetic pyrethroids
  • bifenthrin
  • population density
  • urbanization
  • trace organics

Cite this

Marshall, Stephen ; Sharley, David ; Jeppe, Katherine ; Sharp, Simon ; Rose, Gavin ; Pettigrove, Vincent. / Potentially toxic concentrations of synthetic pyrethroids associated with low density residential land use. In: Frontiers in Environmental Science. 2016 ; Vol. 4.
@article{822753b1fa42452bb4a85ef0ae8ef9e9,
title = "Potentially toxic concentrations of synthetic pyrethroids associated with low density residential land use",
abstract = "Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runoff, concentrations of emerging chemicals of concern were determined in sediments from 99 urban wetlands in and around Melbourne, Australia between February and April, 2015. As a preliminary estimation of potential risks to aquatic biota, we compared measured concentrations with thresholds for acute and chronic toxicity, and modeled toxic units as a function of demographic and land use trends. The synthetic pyrethroid insecticide bifenthrin was common and widespread, and frequently occurred at concentrations likely to cause toxicity to aquatic life. Personal care products DEET and triclosan were common and widely distributed, while the herbicides diuron and prometryn, and the fungicides pyrimethanil and trifloxystrobin occurred less frequently. Toxic unit modeling using random forests found complex and unexpected associations between urban land uses and trace organic concentrations. Synthetic pyrethroid insecticides were identified as emerging compounds of concern, particularly bifenthrin. In contrast with previous surveys, the highest bifenthrin concentrations were associated with lower housing and population density, implicating low-density residential land use in bifenthrin contamination. We discuss the implications for pesticide regulation and urban wetland management in a global context.",
keywords = "synthetic pyrethroids, bifenthrin, population density, urbanization, trace organics",
author = "Stephen Marshall and David Sharley and Katherine Jeppe and Simon Sharp and Gavin Rose and Vincent Pettigrove",
year = "2016",
month = "11",
day = "22",
doi = "10.3389/fenvs.2016.00075",
language = "English",
volume = "4",
journal = "Frontiers in Environmental Science",
issn = "2296-665X",
publisher = "Frontiers Media",

}

Potentially toxic concentrations of synthetic pyrethroids associated with low density residential land use. / Marshall, Stephen; Sharley, David; Jeppe, Katherine ; Sharp, Simon; Rose, Gavin; Pettigrove, Vincent.

In: Frontiers in Environmental Science, Vol. 4, 75, 22.11.2016.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Potentially toxic concentrations of synthetic pyrethroids associated with low density residential land use

AU - Marshall, Stephen

AU - Sharley, David

AU - Jeppe, Katherine

AU - Sharp, Simon

AU - Rose, Gavin

AU - Pettigrove, Vincent

PY - 2016/11/22

Y1 - 2016/11/22

N2 - Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runoff, concentrations of emerging chemicals of concern were determined in sediments from 99 urban wetlands in and around Melbourne, Australia between February and April, 2015. As a preliminary estimation of potential risks to aquatic biota, we compared measured concentrations with thresholds for acute and chronic toxicity, and modeled toxic units as a function of demographic and land use trends. The synthetic pyrethroid insecticide bifenthrin was common and widespread, and frequently occurred at concentrations likely to cause toxicity to aquatic life. Personal care products DEET and triclosan were common and widely distributed, while the herbicides diuron and prometryn, and the fungicides pyrimethanil and trifloxystrobin occurred less frequently. Toxic unit modeling using random forests found complex and unexpected associations between urban land uses and trace organic concentrations. Synthetic pyrethroid insecticides were identified as emerging compounds of concern, particularly bifenthrin. In contrast with previous surveys, the highest bifenthrin concentrations were associated with lower housing and population density, implicating low-density residential land use in bifenthrin contamination. We discuss the implications for pesticide regulation and urban wetland management in a global context.

AB - Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runoff, concentrations of emerging chemicals of concern were determined in sediments from 99 urban wetlands in and around Melbourne, Australia between February and April, 2015. As a preliminary estimation of potential risks to aquatic biota, we compared measured concentrations with thresholds for acute and chronic toxicity, and modeled toxic units as a function of demographic and land use trends. The synthetic pyrethroid insecticide bifenthrin was common and widespread, and frequently occurred at concentrations likely to cause toxicity to aquatic life. Personal care products DEET and triclosan were common and widely distributed, while the herbicides diuron and prometryn, and the fungicides pyrimethanil and trifloxystrobin occurred less frequently. Toxic unit modeling using random forests found complex and unexpected associations between urban land uses and trace organic concentrations. Synthetic pyrethroid insecticides were identified as emerging compounds of concern, particularly bifenthrin. In contrast with previous surveys, the highest bifenthrin concentrations were associated with lower housing and population density, implicating low-density residential land use in bifenthrin contamination. We discuss the implications for pesticide regulation and urban wetland management in a global context.

KW - synthetic pyrethroids

KW - bifenthrin

KW - population density

KW - urbanization

KW - trace organics

U2 - 10.3389/fenvs.2016.00075

DO - 10.3389/fenvs.2016.00075

M3 - Article

VL - 4

JO - Frontiers in Environmental Science

JF - Frontiers in Environmental Science

SN - 2296-665X

M1 - 75

ER -