Application of in-situ bioassays with macrophytes in aquatic mesocosm studies

Coors, Anja; Kuckelkorn, Jochen; Hammers‐Wirtz, Monika; Strauß, Tido

doi:10.1007/s10646-006-0095-z

Cited by 27 publications

(14 citation statements)

References 24 publications

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“…Terbuthylazine is a triazine pesticide that is moderately toxic to fish and highly toxic to zooplankton (PAN, 2009). Literature reports a wide range of EC50 for the different trophic levels in aquatic ecosystems, with algae being the most sensitive group, and for that reason terbuthylazine is also used as an algicide in some parts of the world (Coors et al, 2006). Even though terbuthylazine is generally only applied once per season, the predicted effect concentration of 2.9 μg/ℓ poses a risk to the environment.…”

Section: The 'Possible Risk' Categorymentioning

confidence: 99%

Preliminary risk assessment of common-use pesticides using PRIMET and PERPEST pesticide risk models in a semi-arid subtropical region

Malherbe

Vuren

Wepener

2013

WSA

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The pesticide risk in agriculture in developing countries has not been adequately studied due to the extent and fate of pesticides in the environment often being unknown. South Africa is a country that has significant pressure on its freshwater and agricultural resources, which increases the possibility of pesticide effects. Thus, the aim of this study was to evaluate the use of the PRIMET (Pesticide Risks in the Tropics to Man, Environment and Trade) and PERPEST (Predicting the Ecological Risk of PESTicides) models to predict pesticide exposure and effects on aquatic ecosystems due to spray drift. Vaalharts Irrigation Scheme is situated in the Northern Cape Province and receives water from the Vaal River for 43 000 ha of agricultural land. Crops in the area mostly consist of wheat, maize and groundnuts. Data gathered through household surveys with farmers were used in PRIMET as a first-tier estimate of the potential risk of the pesticides. The Predicted Effect Concentrations (PEC) calculated for the pesticides indicating a possible to definite risk were then used as input for PERPEST. PERPEST is a higher-tier model that predicts the potential effects of a pesticide on various grouped endpoints in the aquatic environment. The PRIMET results indicated most pesticides posed no risk to the environment, except the pyrethroid, deltamethrin. The ETR for deltamethrin indicated a possible to definite risk to the aquatic environment. The PERPEST results for deltamethrin indicated a high probability of clear effects on insects, micro-and macro-crustacean communities, with a lower probability for rotifers, algae, macrophytes and fish. PRIMET and PERPEST provided valid estimates of risk for pesticides and could be used effectively in South Africa.

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Section: The 'Possible Risk' Categorymentioning

confidence: 99%

Preliminary risk assessment of common-use pesticides using PRIMET and PERPEST pesticide risk models in a semi-arid subtropical region

Malherbe

Vuren

Wepener

2013

WSA

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“…Since sub-lethal, population-level responses are of great significance to natural ecosystems, it is important to consider the application of in situ bioassays to obtain reliable and sensitive measures of pesticide effects (Maltby, 1999;Slijkerman et al, 2004). In situ bioassays deployed within semi-field experiments have the advantage of testing selected species under realistic field conditions compared to laboratory tests and provide a mechanistic explanation of effects by linking organism-level physiological or behavioural responses and community functional parameters (Caquet et al, 2007;Coors et al, 2006;Hruska and Dube, 2004;Kreutzweiser et al, 2007). The use of the mesocosm approach in combination with experimental tests covering functional and structural endpoints at various levels of biological organisation can help identify causal mechanisms responsible for direct and indirect effects of pesticide contamination on natural communities and ecosystem functions (Baird et al, 2001;Mills and Semlitsch, 2004;Relyea et al, 2005;Rohr et al, 2006;Slijkerman et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Structural and functional responses of benthic invertebrates to imidacloprid in outdoor stream mesocosms

Pestana

Alexander

Culp

et al. 2009

Environmental Pollution

104

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a b s t r a c tStructural and functional responses of a benthic macroinvertebrate assemblage to pulses of the insecticide imidacloprid were assessed in outdoor stream mesocosms. Imidacloprid pulses reduced invertebrate abundance and community diversity in imidacloprid-dosed streams compared to control streams. These results correlated well with effects of imidacloprid on leaf litter decomposition and feeding rates of Pteronarcys comstocki, a stonefly, in artificial streams. Reductions in oxygen consumption of stoneflies exposed to imidacloprid were also observed in laboratory experiments. Our findings suggest that leaf litter degradation and single species responses can be sensitive ecotoxicological endpoints that can be used as early warning indicators and biomonitoring tools for pesticide contamination. The data generated illustrates the value of mesocosm experiments in environmental assessment and how the consideration of functional and structural endpoints of natural communities together with in situ single species bioassays can improve the evaluation and prediction of pesticide effects on stream ecosystems.

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“…In situ application of the Lemna assay is relatively rare (e.g. Gardner and Grue 1996, Mkandawire and Dudel 2005, Coors et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Phytoassessment of acid mine drainage: Lemna gibba bioassay and diatom community structure

Gerhardt

Bisthoven

Guhr³

et al. 2007

Ecotoxicology

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An integrated multilevel phytoassessment of an acid mine drainage (AMD, pH range 3.3-6.8) in southern Portugal was performed. A 7-day phytotoxicity bioassay with the duckweed Lemna gibba (chlorosis, necrosis, growth) was carried out, both in the laboratory and in situ, combined with an analysis of the resident epilithic diatom community. The toxicity test was performed with water from the AMD gradient, an unpolluted river control and acidified control water, in order to discriminate potential pH-effects from combined pH- and metal-effects. Diatom communities discriminated well among the sites (alkalophilic species versus halobiontic, acidobiontic and acidophilic species), showing inter-site differences to be larger than intra-site seasonal variations. In L. gibba exposed to AMD, necrosis and growth inhibition were higher in situ compared to the laboratory experiments. L. gibba was more sensitive to AMD than to acidified water. Already after 4 days, growth rate inhibition in L. gibba proved to be a reliable indicator of AMD-stress. Ecotoxicological thresholds obtained with L. gibba corresponded with those obtained previously with animals of intermediate tolerance to AMD. The results were summarised in a multimetric index.

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Application of in-situ bioassays with macrophytes in aquatic mesocosm studies

Cited by 27 publications

References 24 publications

Preliminary risk assessment of common-use pesticides using PRIMET and PERPEST pesticide risk models in a semi-arid subtropical region

Preliminary risk assessment of common-use pesticides using PRIMET and PERPEST pesticide risk models in a semi-arid subtropical region

Structural and functional responses of benthic invertebrates to imidacloprid in outdoor stream mesocosms

Phytoassessment of acid mine drainage: Lemna gibba bioassay and diatom community structure

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