The effects of a pesticide mixture on aquatic ecosystems differing in trophic status: responses of the macrophyte Myriophyllum spicatum and the periphytic algal community

Wendt-Rasch, Lina; Brink, Paul J. Van den; Crum, Sjh; Woin, Per

doi:10.1016/j.ecoenv.2003.09.010

Cited by 46 publications

(45 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The structure of an ecosystem determines the final effect of pesticide exposure to macrophytes (Wendt-Rasch et al 2004). Using a pesticide mixture containing lambdacyhalothrin applied to 10 mesotrophic aquatic ecosystems dominated by submerged macrophytes (Elodea) and 10 simulated eutrophic ecosystems with a high Lemna surface coverage, significant increases in the biomass and alterations of species composition of the periphytic algae were observed in the Elodea-dominated microcosms, but no effect on Myriophyllum spicatum growth was observed.…”

Section: Macrophytesmentioning

confidence: 94%

Environmental Chemistry, Ecotoxicity, and Fate of Lambda-Cyhalothrin

Troiano

Wang

et al. 2008

Reviews of Environmental Contamination and Toxicology

120

View full text Add to dashboard Cite

Section: Macrophytesmentioning

confidence: 94%

Environmental Chemistry, Ecotoxicity, and Fate of Lambda-Cyhalothrin

Troiano

Wang

et al. 2008

Reviews of Environmental Contamination and Toxicology

120

View full text Add to dashboard Cite

“…; Zabik and Seiber 1993;Aston and Seiber 1997;McConnell et al 1998;LeNoir et al 1999;Battaglin et al 2003;Hageman et al 2006;Munn et al 2006;Daly et al 2007;Gilliom et al 2007). Although we have data on the toxicity of most pesticides to a small number of model organisms, and a few studies have examined separate and pairwise combinations of pesticides (Howe et al 1998;van Den Brink et al 2002;Boone and Bridges-Britton 2006;Relyea 2004), we have a poor understanding of how more diverse mixtures of contaminants (e.g., four or more chemicals) aVect individuals (Britson and Threlkeld 1998;Faust et al 2003;Christin et al 2003Christin et al , 2004Gendron et al 2003;Hayes et al 2006) or communities (Ridal et al 2001;van Wijngaarden et al 2004;Wendt-Rasch et al 2004).…”

Section: Introductionmentioning

confidence: 98%

A cocktail of contaminants: how mixtures of pesticides at low concentrations affect aquatic communities

2008

View full text Add to dashboard Cite

The ubiquity of anthropogenic chemicals in nature poses a challenge to understanding how ecological communities are impacted by them. While we are rapidly gaining an understanding of how individual contaminants affect communities, communities are exposed to suites of contaminants yet investigations of the effects of diverse contaminant mixtures in aquatic communities are rare. I examined how a single application of five insecticides (malathion, carbaryl, chlorpyrifos, diazinon, and endosulfan) and five herbicides (glyphosate, atrazine, acetochlor, metolachlor, and 2,4-D) at low concentrations (2-16 p.p.b.) affected aquatic communities composed of zooplankton, phytoplankton, periphyton, and larval amphibians (gray tree frogs, Hyla versicolor, and leopard frogs, Rana pipiens). Using outdoor mesocosms, I examined each pesticide alone, a mix of insecticides, a mix of herbicides, and a mix of all ten pesticides. Individual pesticides had a wide range of direct and indirect effects on all trophic groups. For some taxa (i.e., zooplankton and algae), the impact of pesticide mixtures could largely be predicted from the impacts of individual pesticides; for other taxa (i.e., amphibians) it could not. For amphibians, there was an apparent direct toxic effect of endosulfan that caused 84% mortality of leopard frogs and an indirect effect induced by diazinon that caused 24% mortality of leopard frogs. When pesticides were combined, the mix of herbicides had no negative effects on the survival and metamorphosis of amphibians, but the mix of insecticides and the mix of all ten pesticides eliminated 99% of leopard frogs. Interestingly, these mixtures did not cause mortality in the gray tree frogs and, as a result, the gray tree frogs grew nearly twice as large due to reduced competition with leopard frogs. In short, wetland communities can be dramatically impacted by low concentrations of pesticides (both separate and combined) and these results offer important insights for the conservation of wetland communities.

show abstract

“…Other studies have been reported elsewhere on the trophic status of aquatic ecosystems (Rosas et al 1993;Fatoki et al 2003;Wendt-Rasch et al 2004;Liou and Lo 2005;Nasrollahzadeh et al 2008;Sager 2009;Giordani et al 2009). Several approaches have been used to assess the trophic status such as Fuzz index model (Liou and Lo 2005), measurements of water physical-chemical parameters and rates of periphytic net primary productivity (Sager 2009), physical-chemical parameters and phytoplankton communities (Rosas et al 1993).…”

Section: Introductionmentioning

confidence: 99%

Trophic status of Vondo and Albasini Dams; impacts on aquatic ecosystems and drinking water

Odiyo

Chimuka

Mamali³

et al. 2012

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The presence and levels of major nutrients in the water from Vondo and Albasini Dams and their water treatment plants have been assessed to determine trophic status of the dams and impacts on aquatic ecosystems and drinking water. Water quality parameters particularly phosphates and nitrates are critical in assessing the trophic status. Water quality parameters linked to eutrophication and agrochemicals were analyzed. Phosphate was undetectable in both dams. The nitrate levels in Albasini and Vondo Dams which were from 1.16 to 6.65 mg/L and 0.46 to 4.19 mg/L, respectively, were within and above the South African guideline for aquatic ecosystems of 2 mg/L. The raw water pH for Vondo and Albasini Dams were from 6.20 to 7.46 and 6.35 to 8.70, respectively, and were mostly within acceptable guidelines for aquatic ecosystems. The water transparency for Vondo and Albasini Dams were from 0.5 to 4.2 m and 0.4 to 0.9 m, respectively. The levels of all other water quality parameters investigated in both dams and their WTPs mostly indicate low, rarely high and no water quality problems in aquatic ecosystems and drinking water. The low levels of total suspended solids and water transparency, the pH range, low to high electrical conductivity, low to acceptable dissolved oxygen levels, acceptable to high biological oxygen demand and nitrate levels for both dams indicate oligotrophic to eutrophic states. Though oligotrophic state dominates, the mixture of trophic states has been attributed to increase in urbanization and intensive agriculture.

show abstract

The effects of a pesticide mixture on aquatic ecosystems differing in trophic status: responses of the macrophyte Myriophyllum spicatum and the periphytic algal community

Cited by 46 publications

References 39 publications

Environmental Chemistry, Ecotoxicity, and Fate of Lambda-Cyhalothrin

Environmental Chemistry, Ecotoxicity, and Fate of Lambda-Cyhalothrin

A cocktail of contaminants: how mixtures of pesticides at low concentrations affect aquatic communities

Trophic status of Vondo and Albasini Dams; impacts on aquatic ecosystems and drinking water

Contact Info

Product

Resources

About