A Pulse of Endosulfan-Contaminated Sediment Affects Macroinvertebrates in Artificial Streams

Hose, Grant C.; Lim, Richard P.; Hyne, Ross V.; Pablo, Fleur

doi:10.1006/eesa.2001.2127

Cited by 23 publications

(8 citation statements)

References 17 publications

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“…The CYP × Part trials resulted in an increase in drift (Fig. 2), thus supporting results from similar microcosm experiments [1,30]. The significant interaction of cypermethrin and sediment (Table 3), however, led to a drift rate that was considerably lower than that in the CYP treatment and measured rates that were significantly lower than the expected rate (Fig.…”

Section: Discussionsupporting

confidence: 80%

“…Macroinvertebrate drift rate has been shown to increase with more fine sediments present [27], which has been attributed to factors such as physical disturbance by moving sediment [28], a response to light reduction [29], and settling of silt. Yet, studies also have shown no change in macroinvertebrate drift behavior in response to sediment contamination [30]. Cooper [31] found that invertebrates have the ability to withstand high concentrations of suspended sediments (> 1 g/L) for brief periods but that their mortality rates increase with time.…”

Section: Discussionmentioning

confidence: 99%

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Combined effects of discharge, turbidity, and pesticides on mayfly behavior: Experimental evaluation of spray‐drift and runoff scenarios

Dabrowski

Bollen

Schulz

2005

Enviro Toxic and Chemistry

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The effects of the pyrethroid-insecticide cypermethrin (CYP), increased flow speed (Flow), and increased suspended particles (Part) on drift behavior and activity of mayfly nymphs (Baetis harrisoni) were investigated both individually and in combination in a laboratory stream microcosm. Spray-drift trials were performed by exposing the nymphs to 1 microg/L of CYP. During runoff trials (CYP x Part), contaminated sediment containing 2,000 microg/kg of CYP was introduced to the microcosm at a concentration of 500 mg/L. Both trials were carried out under high-flow (CYP x Flow and CYP x Part x Flow) and low-flow (CYP and CYP x Part) conditions, and for all cases, control experiments were performed. Drift rate, drift density (for any treatments with increased flow), and activity were used as behavioral endpoints. Multifactorial analysis of variance shows that CYP exposure significantly increased the drift, whereas Part and Flow trials significantly decreased the drift (p < 0.05). In addition, activity decreased significantly under high-flow conditions. The CYP x Part and CYP x Flow treatments resulted in increased drift rate and drift density, respectively, whereas Part x Flow and CYP x Part x Flow treatments resulted in decreased drift density. The CYP x Part and CYP x Flow trials had a significant antagonistic, interactive effect on drift rate and drift density, respectively, with measured levels being lower than expected levels. The reduction in bioavailability of CYP in the presence of increased flow and sediment levels suggests that mayflies are more likely to be affected by spray-drift exposure (CYP) than by runoff exposure (CYP x Part x Flow). Results indicate that mayflies reacted actively in response to flow conditions and passively in response to pesticide exposure.

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Combined effects of discharge, turbidity, and pesticides on mayfly behavior: Experimental evaluation of spray‐drift and runoff scenarios

Dabrowski

Bollen

Schulz

2005

Enviro Toxic and Chemistry

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“…On the other hand, Endosulfan I was the fifth compound in terms of average concentration, and was found in 12% of sediments. This broad spectrum insecticide and acaricide widely used in agriculture and forestry throughout the world (Leonard et al 2001;Hose et al 2002;Di et al 2005) is commonly used as Technical Endosulfan containing approximately 70% Endosulfan I and 30% Endosulfan II. As Endosulfan II was not detected in sediments (which have been reported to interconvert with its isomer under certain conditions) and its major metabolite, Endosulfan sulfate was found in 4% of sediments in lesser amounts, the occurrence of Endosulfan I was indicative of quite recent use of commercial Endosulfan.…”

Section: Seasonal Distributionmentioning

confidence: 99%

Multi-year monitoring of estuarine sediments as ultimate sink for DDT, HCH, and other organochlorinated pesticides in Argentina

Arias

Pereyra

Marcovecchio

2010

Environ Monit Assess

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Forty-nine superficial sediment samples used in this study were collected from eight sites in the Bahia Blanca Estuary, located in the Buenos Aires Province southwest, Argentina, in a period between April 2005 and March 2009, to assess the concentration levels, spatial and seasonal distribution, and putative input sources of 18 selected organochlorine pesticides (OCs), following UNEP-IAEA procedures. Average concentration levels in sediments ranged between 3.54 and 63.79 ng g⁻¹, d.w. (mean = 15.99 ng g⁻¹, d.w.), for ∑OCs, and from nondetectable to 8.03 ng g⁻¹, d.w. (mean = 2.16 ng g⁻¹, d.w.), and from nondetectable to 3.20 ng g⁻¹ (mean = 0.97 ng g⁻¹, d.w.) for hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs), respectively. Principal component analysis allowed the classification of sampling sites according to the main OCs inputs over the estuary. In comparison to other worldwide locations and to the world coastal sediment concentrations range, sediment DDTs and HCHs levels were in the low range; on the opposite, ∑OCs average was in the medium range. OCs seasonal distribution was found to be highly correlated with the precipitations seasonality and sowing seasons in the adjacent agriculture fields. In addition, an ecotoxicological risk assessment pointed industrial and agriculture catchment zones with intermediate probability of adverse effects to biota, while the city sewage outfall was classified with none indication of an immediate threat. Data indicated that the estuary sediments were functioning as a sink for persistent OC pesticides (either in use or banned), however, it was found a declining trend on their environmental burden.

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“…Toxicity tests were conducted in a system of stream mesocosms that was constructed on the banks of the Namoi River near Gunnedah (NSW, Australia). The stream mesocosms (hereafter referred to as mesocosms) are described in detail by Hose et al [13].…”

Section: Methodsmentioning

confidence: 99%

Toxicity of endosulfan to Atalophlebia spp. (Ephemeroptera) in the laboratory, mesocosm, and field

Hose

Hyne

Lim

2003

Enviro Toxic and Chemistry

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A series of single-species toxicity tests was conducted in the laboratory and in outdoor stream mesocosms. The mayfly nymphs of Atalophlebia spp. (A. av2 and A. av6) were exposed to the organochlorine pesticide endosulfan for either 12- or 48-h periods, with mortality recorded after 96 h. For both exposure periods, the lethal concentration (LC50 and LC 10) values were not significantly different between laboratory and mesocosm single-species tests, suggesting that the absence of natural environmental conditions and biological interactions in laboratory single-species tests did not influence the toxicity of technical endosulfan to Atalophlebia spp. Interpolation of toxicity test data indicates that peak endosulfan concentrations recorded in the rivers during storm events are likely to cause only minimal impact on Atalophlebia spp. populations. This suggests that changes in the abundance of populations observed in the field, if due to total endosulfan alone, are the result of chronic rather than acute exposure.

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A Pulse of Endosulfan-Contaminated Sediment Affects Macroinvertebrates in Artificial Streams

Cited by 23 publications

References 17 publications

Combined effects of discharge, turbidity, and pesticides on mayfly behavior: Experimental evaluation of spray‐drift and runoff scenarios

Combined effects of discharge, turbidity, and pesticides on mayfly behavior: Experimental evaluation of spray‐drift and runoff scenarios

Multi-year monitoring of estuarine sediments as ultimate sink for DDT, HCH, and other organochlorinated pesticides in Argentina

Toxicity of endosulfan to Atalophlebia spp. (Ephemeroptera) in the laboratory, mesocosm, and field

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