Impact of an organophosphate herbicide (GlyphosateR) on periphyton communities developed in experimental streams

Austin, A. P.; Harris, G.E.; Lucey, W. P.

doi:10.1007/bf01689449

Cited by 44 publications

(29 citation statements)

References 11 publications

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“…For this reason, many experimental studies have attempted to use complex communities. Two papers by Goldsborough & Brown (1988) and Austin et al (1991) found that glyphosate had no major impact on periphyton communities. However, Austin et al (1991) suggested that the degradation of glyphosate could increase the concentration of soluble phosphorus, and consequently increase the biomasses of the communities.…”

Section: Impact Of Glyphosate On Aquatic Microorganismsmentioning

confidence: 99%

“…Two papers by Goldsborough & Brown (1988) and Austin et al (1991) found that glyphosate had no major impact on periphyton communities. However, Austin et al (1991) suggested that the degradation of glyphosate could increase the concentration of soluble phosphorus, and consequently increase the biomasses of the communities. Subsequently, Vera et al (2010) showed that the periphytic colonization of substrata was delayed in Roundup-contaminated large mesocosms, and that this phenomenon could be attributed to a direct effect of the contaminant.…”

Section: Impact Of Glyphosate On Aquatic Microorganismsmentioning

confidence: 99%

See 1 more Smart Citation

Herbicide Contamination of Freshwater Ecosystems: Impact on Microbial Communities

Villeneuve¹,

Larroudé²,

Humbert³

2011

Pesticides - Formulations, Effects, Fate

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Section: Impact Of Glyphosate On Aquatic Microorganismsmentioning

confidence: 99%

Section: Impact Of Glyphosate On Aquatic Microorganismsmentioning

confidence: 99%

Herbicide Contamination of Freshwater Ecosystems: Impact on Microbial Communities

Villeneuve¹,

Larroudé²,

Humbert³

2011

Pesticides - Formulations, Effects, Fate

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“…Because periphyton integrates the influences of environmental conditions over long periods of time, they have been widely applied for monitoring purposes (Sabater and Admiral 2005). Some studies focused on the effect of Roundup Ò on structural and functional features of the periphytic algal fraction (Goldsborough and Brown 1988;Holtby and Baillie 1989) while Austin et al (1991) used Vision Ò , another glyphosate-based herbicide, for a similar purpose.…”

Section: Introductionmentioning

confidence: 99%

New evidences of Roundup® (glyphosate formulation) impact on the periphyton community and the water quality of freshwater ecosystems

et al. 2009

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Argentina is the second largest world producer of soybeans (after the USA) and along with the increase in planted surface and production in the country, glyphosate consumption has grown in the same way. We investigated the effects of Roundup (glyphosate formulation) on the periphyton colonization. The experiment was carried out over 42 days in ten outdoor mesocosms of different typology: "clear" waters with aquatic macrophytes and/or metaphyton and "turbid" waters with great occurrence of phytoplankton or suspended inorganic matter. The herbicide was added at 8 mg L(-1) of the active ingredient (glyphosate) in five mesocosms while five were left as controls (without Roundup addition). The estimate of the dissipation rate (k) of glyphosate showed a half-life value of 4.2 days. Total phosphorus significantly increased in treated mesocosms due to Roundup degradation what favored eutrophication process. Roundup produced a clear delay in periphytic colonization in treated mesocosms and values of the periphytic mass variables (dry weight, ash-free dry weight and chlorophyll a) were always higher in control mesocosms. Despite the mortality of algae, mainly diatoms, cyanobacteria was favored in treated mesocosms. It was observed that glyphosate produced a long term shift in the typology of mesocosms, "clear" turning to "turbid", which is consistent with the regional trend in shallow lakes in the Pampa plain of Argentina. Based on our findings it is clear that agricultural practices that involve the use of herbicides such as Roundup affect non-target organisms and the water quality, modifying the structure and functionality of freshwater ecosystems.

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“…There are many reports on the effects of herbicides such as atrazine and simazine on algal production and/or communities in the experimental streams (Kosinski 1984;Hamala and Kollig 1985;Lynch et al 1985;Krieger et al 1988;Jurgensen and Hoagrani 1990;Austin et al 1991). Most of these deal with the effects of a single herbicide.…”

Section: Introductionmentioning

confidence: 99%

Assessment of herbicide effects on algal production in the Kokai River (Japan) using a model stream and Selenastrum bioassay

Hatakeyama

Fukushima²,

Kasai

et al. 1994

Ecotoxicology

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The effects of herbicides on algal production in the Kokai River were assessed using a Selenastrum growth inhibition test and by an investigation of the periphyton formed in a channel carrying river water. Herbicides in the water were analysed at the same intervals as the algal growth test (three times per week) from April to August 1992. Growth of Selenastrum in the river water samples was inhibited severely in mid-May, mostly by the joint effects of butachlor and pretilachlor and from early to late June mostly by simetryn alone. The influence of six other kinds of herbicide was low or not detectable. Selenastrum growth ratios (SGR) in the river water samples were correlated with fluctuations in SG-IP (Selenastrum growth inhibition potential), the sum of the growth inhibition ratios by the respective herbicides at the concentrations detected in the river. However, the expected growth inhibition (SG-IP) was usually larger than the observed value (SGR); the reasons for this are discussed.The rate of accumulation of periphyton, which formed on a substrate in the channel, decreased from early May and stayed at relatively low levels until early June. The low accumulation rate from mid-June to mid-July, when growth of Selenastrum had almost recovered, can be attributed to grazing by invertebrates. These results suggested that algal production in the Kokai River is affected by the single or joint action of herbicides, at least in the period from early May to early June.

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Impact of an organophosphate herbicide (GlyphosateR) on periphyton communities developed in experimental streams

Cited by 44 publications

References 11 publications

Herbicide Contamination of Freshwater Ecosystems: Impact on Microbial Communities

Herbicide Contamination of Freshwater Ecosystems: Impact on Microbial Communities

New evidences of Roundup® (glyphosate formulation) impact on the periphyton community and the water quality of freshwater ecosystems

Assessment of herbicide effects on algal production in the Kokai River (Japan) using a model stream and Selenastrum bioassay

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