Spatial and Temporal Variability in Pesticide Exposure Downstream of a Heavily Irrigated Cropping Area: Application of Different Monitoring Techniques

D. O'Brien; S. Lewis; A. Davis; C. Gallen; R. Smith; R. Turner; Michael St. J. Warne; S. Turner; S. Caswell; J. F. Mueller; J. Brodie

doi:10.1021/acs.jafc.5b04710

Spatial and Temporal Variability in Pesticide Exposure Downstream of a Heavily Irrigated Cropping Area: Application of Different Monitoring Techniques

D. O'Brien, S. Lewis, A. Davis, C. Gallen, R. Smith, R. Turner, Michael St. J. Warne, S. Turner, S. Caswell, J. F. Mueller, J. Brodie

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Abstract

Pesticide exposure threatens many freshwater and estuarine ecosystems around the world. This study examined the temporal and spatial trends of pesticide concentrations in a waterway within an agriculturally developed dry-tropics catchment using a combination of grab and passive sampling methods over a continuous two-year monitoring program. A total of 43 pesticide residues were detected with 7 pesticides exceeding ecologically relevant water quality guidelines/trigger values during the study period and 4 (ametryn, atrazine, diuron, and metolachlor) of these exceeding guidelines for several months. The presence and concentration of the pesticides in the stream coincided with seasonal variability in rainfall, harvest timing/cropping cycle, and management changes. The sampling approach used demonstrates that the application of these complementary sampling techniques (both grab and passive sampling methods) was effective in establishing pesticide usage patterns in upstream locations where application data are unavailable.

Original language	English
Pages (from-to)	3975–3989
Journal	Journal of Agricultural and Food Chemistry
Volume	64
Issue number	20
Early online date	11 Jan 2016
DOIs	https://doi.org/10.1021/acs.jafc.5b04710
Publication status	Published - 25 May 2016
Externally published	Yes

Bibliographical note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Agricultural and Food Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.jafc.5b04710

Keywords

Great Barrier Reef
pesticides
herbicides
passive sampling
sugar cane
irrigation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.jafc.5b04710

O'Brien et al in press

Cite this

O'Brien, D., Lewis, S., Davis, A., Gallen, C., Smith, R., Turner, R., Warne, M. S. J., Turner, S., Caswell, S., Mueller, J. F., & Brodie, J. (2016). Spatial and Temporal Variability in Pesticide Exposure Downstream of a Heavily Irrigated Cropping Area: Application of Different Monitoring Techniques. Journal of Agricultural and Food Chemistry, 64(20), 3975–3989. https://doi.org/10.1021/acs.jafc.5b04710

O'Brien, D, Lewis, S, Davis, A, Gallen, C, Smith, R, Turner, R, Warne, MSJ, Turner, S, Caswell, S, Mueller, JF & Brodie, J 2016, 'Spatial and Temporal Variability in Pesticide Exposure Downstream of a Heavily Irrigated Cropping Area: Application of Different Monitoring Techniques', Journal of Agricultural and Food Chemistry, vol. 64, no. 20, pp. 3975–3989. https://doi.org/10.1021/acs.jafc.5b04710

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abstract = "Pesticide exposure threatens many freshwater and estuarine ecosystems around the world. This study examined the temporal and spatial trends of pesticide concentrations in a waterway within an agriculturally developed dry-tropics catchment using a combination of grab and passive sampling methods over a continuous two-year monitoring program. A total of 43 pesticide residues were detected with 7 pesticides exceeding ecologically relevant water quality guidelines/trigger values during the study period and 4 (ametryn, atrazine, diuron, and metolachlor) of these exceeding guidelines for several months. The presence and concentration of the pesticides in the stream coincided with seasonal variability in rainfall, harvest timing/cropping cycle, and management changes. The sampling approach used demonstrates that the application of these complementary sampling techniques (both grab and passive sampling methods) was effective in establishing pesticide usage patterns in upstream locations where application data are unavailable. ",

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AB - Pesticide exposure threatens many freshwater and estuarine ecosystems around the world. This study examined the temporal and spatial trends of pesticide concentrations in a waterway within an agriculturally developed dry-tropics catchment using a combination of grab and passive sampling methods over a continuous two-year monitoring program. A total of 43 pesticide residues were detected with 7 pesticides exceeding ecologically relevant water quality guidelines/trigger values during the study period and 4 (ametryn, atrazine, diuron, and metolachlor) of these exceeding guidelines for several months. The presence and concentration of the pesticides in the stream coincided with seasonal variability in rainfall, harvest timing/cropping cycle, and management changes. The sampling approach used demonstrates that the application of these complementary sampling techniques (both grab and passive sampling methods) was effective in establishing pesticide usage patterns in upstream locations where application data are unavailable.

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ER -

Spatial and Temporal Variability in Pesticide Exposure Downstream of a Heavily Irrigated Cropping Area: Application of Different Monitoring Techniques

Abstract

Bibliographical note

Keywords

UN SDGs

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