A low concentration of atrazine does not influence the acute toxicity of the insecticide terbufos or its breakdown products to Chironomus tepperi

Choung, Catherine B.; Hyne, Ross V.; Stevens, Mark M.; Hose, Grant C.

doi:10.1007/s10646-010-0538-4

Cited by 9 publications

(3 citation statements)

References 61 publications

(69 reference statements)

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“…For example, laboratory studies have measured toxicity using bioassays of cultured taxa (Choung et al . ), and field microcosms have measured the response of invertebrate communities to contaminated sediment (O'Brien et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Hence, there has been considerable effort to quantify the impacts of contaminated sediments and surface waters on aquatic fauna through laboratory and field ecotoxicological studies (Burton, Pitt & Clark 2000). For example, laboratory studies have measured toxicity using bioassays of cultured taxa (Choung et al 2010), and field microcosms have measured the response of invertebrate communities to contaminated sediment (O'Brien et al 2010). In situ bioassays, where caged aquatic organisms are exposed to in-stream conditions, measure biological responses over time and can incorporate impacts from pulse events such as episodic sewage spills, which are often difficult to assess in traditional laboratory-based bioassays (Crane et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Ecological evidence links adverse biological effects to pesticide and metal contamination in an urban Australian watershed

Kellar

Hassell

Long

et al. 2014

Journal of Applied Ecology

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Summary1. Aquatic ecosystems near urban areas are often ecologically impaired, but causative factors are rarely identified. Effects may be revealed by considering multiple lines of evidence at different levels of biological organization. 2. Biological impairment is evident in the urban section of the Upper Dandenong Creek Catchment (Victoria, Australia). We assessed whether episodic sewage spills or other pollutants were the cause of poor ecological condition in the stream. The evidence evaluated included chemical and invertebrate assessments, caging studies of mudsnails Potamopyrgus antipodarum, antioxidant biomarkers and endocrine disruption-related endpoints in fish (Carassius auratus and Gambusia holbrooki) and toxicological studies with chironomids (Chironomus tepperi). 3. A combination of metals and pesticides is likely to be affecting the aquatic fauna across all biological levels, with macroinvertebrate communities, P. antipodarum and C. tepperi populations and C. auratus individuals all ecologically impaired. Adverse alterations to aquatic fauna were consistently seen in Bungalook Creek and persisted downstream of this confluence into Dandenong Creek. 4. In addition, chemical assessments and toxicity identification evaluation (TIEs) resulted in several point sources of both metals and pesticides being identified as origins of impairment. This contrasted with an expectation that adverse effects were likely to be associated with sewer-related pollution. As a consequence, target areas and specific pollutants were identified for remediation instead of an expensive sewer upgrade. 5. Synthesis and applications. The results demonstrate that it is important to investigate biological effects in different taxa, in both the laboratory and field, to understand which stressors are causing adverse effects on faunal assemblages. When adverse effects are seen across multiple levels of biological organization and caused by the same pollutant from an identifiable source, there is a clear remedial path for managers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ecological evidence links adverse biological effects to pesticide and metal contamination in an urban Australian watershed

Kellar

Hassell

Long

et al. 2014

Journal of Applied Ecology

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“…These species have been used extensively in laboratory-and field-based toxicity testing (e.g. Duft et al 2003;Choung et al 2010;Seeland et al 2013;Gust et al 2014;Kellar et al 2014;Ma et al 2014). Population-level responses (reproduction and first-generation survival) were measured in P. antipodarum and P. acuta.…”

Section: Introductionmentioning

confidence: 99%

Detecting copper toxicity in sediments: from the subindividual level to the population level

Jeppe

Yang

Long

et al. 2016

Journal of Applied Ecology

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Summary Sediments accumulate chemicals that can be toxic to biota and often contribute to aquatic ecosystem decline. Measuring mortality in laboratory‐bred organisms is a common way to assess sediment toxicity. However, mortality‐based responses of resilient laboratory organisms may not reflect indigenous macroinvertebrate responses, which can be relatively more sensitive to sediment toxicants. A possible solution is to also measure responses at the subindividual level. Several organism responses to sediment copper toxicity were assessed in a field‐based microcosm. Responses of laboratory‐bred chironomids and snails deployed in microcosms were compared at subindividual (metabolomic and gene expression), individual (survival and dry weight) and population (reproduction) levels, and contrasted to the abundance of colonizing macroinvertebrates in the microcosms. Colonizing macroinvertebrate abundance showed a range of sensitivities based on EC50 (effect dose 50% change). Chironomidae made up 94·5% of the microcosm macroinvertebrates, with Paratanytarsus the most sensitive genus (EC50: 89 mg kg−1 copper) and Procladius the least sensitive (EC50: 681 mg kg−1). Survival of laboratory‐bred organisms was the least sensitive response, comparable to decreased abundance of the least sensitive macroinvertebrate. Juvenile production in the snail, Potamopyrgus antipodarum, was the most sensitive population‐level response (EC50: 121 mg kg−1), in contrast the snail Physella acuta was relatively more tolerant (EC50: 298 mg kg−1). Changes in subindividual responses (gene expression and metabolite abundance) in laboratory‐bred chironomid, Chironomus tepperi, were evident at 60 mg kg−1. These changes likely reflect the direct effects of copper exposure and represent metal‐specific responses. Synthesis and applications. We showed that copper toxicity in sediments could be readily detected through changes in gene expression and metabolites in laboratory‐bred chironomids exposed in field‐based microcosms. These responses were more sensitive than mortality, and detected copper levels that caused microcosm chironomid populations to decline. These novel approaches will provide managers with new tools to better assess sediment toxicity.

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A multi-platform metabolomics approach demonstrates changes in energy metabolism and the transsulfuration pathway in Chironomus tepperi following exposure to zinc

Long

Tull²,

Jeppe

et al. 2015

Aquatic Toxicology

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A low concentration of atrazine does not influence the acute toxicity of the insecticide terbufos or its breakdown products to Chironomus tepperi

Cited by 9 publications

References 61 publications

Ecological evidence links adverse biological effects to pesticide and metal contamination in an urban Australian watershed

Ecological evidence links adverse biological effects to pesticide and metal contamination in an urban Australian watershed

Detecting copper toxicity in sediments: from the subindividual level to the population level

A multi-platform metabolomics approach demonstrates changes in energy metabolism and the transsulfuration pathway in Chironomus tepperi following exposure to zinc

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