Effects of Herbicide Glyphosate and Glyphosate-Based Formulations on Aquatic Ecosystems

Pérez, Gonzalo L.; Vera, María Solange; Miranda, Leandro Andrés

doi:10.5772/12877

Cited by 25 publications

(13 citation statements)

References 102 publications

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“…In addition, here we demonstrated that the herbicide also does not have severe effects on the studied predators if it is present at a constantly high concentration and does not diminish due to degradation, precipitation or adsorption. These results are surprising, because glyphosate-based herbicides have been shown to have strong impacts at lower concentrations on other aquatic arthropods and amphibians even in larval (Relyea 2005b, Relyea & Jones 2009, Pérez et al 2011 or adult stages (BrÜhl et al 2011). Hence, our results stress the need for further studies uncovering differences between the sensitivity of different taxa and life stages.…”

Section: Discussionmentioning

confidence: 70%

“…Aquatic species are especially sensitive to pesticides, and already low concentrations can lead to mortalities and local extinctions (Pérez et al 2011). However, sublethal concentrations are usually found in nature (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Glyphosate-based herbicides are among the most frequently applied pesticides worldwide (Pérez et al 2011, MÖrtl et al 2013. Expected worstcase concentrations of these herbicides in shallow water bodies range from 1.4 to 7.6 mg acid equivalent (a.e.)…”

Section: Introductionmentioning

confidence: 99%

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No effect of a glyphosate-based herbicide on larval dragonflies (Aeshna cyanea) and adult newts (Lissotriton vulgaris) in a laboratory-based experiment

Ujszegi¹,

Gál²,

Mikó³

et al. 2016

Acta Zool Acad Sci H

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Pesticides can exert negative effects on aquatic organisms at very low concentrations. While several prey taxa are frequently used as models in ecotoxicology studies, there is little information about the pesticide-sensitivity of predators. We examined the effects of a frequently applied glyphosate-based herbicide on two common aquatic predators: larval Aeshna cyanea dragonflies and adult male Lissotriton vulgaris newts, which are top predators in ephemeral water bodies lacking fishes. We exposed predators to the herbicide for 18 days under laboratory conditions and measured potential effects on survival, activity, body mass and predatory activity. To maximize detectability of effects, we applied the herbicide at a concentration of 6.5 mg a. e. glyphosate/L, corresponding to the highest concentration expected in nature. Our results showed that the tested herbicide formulation did not have severe effects on any of the measured fitness-related traits. Results of the present study support the hypothesis that the tested species are insensitive to the herbicide and are able to fulfil their important ecological role of top-down regulation even in highly contaminated habitats. However, potential long-term or indirect effects of the herbicide on the fitness of aquatic predators remain unknown.

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Section: Discussionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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No effect of a glyphosate-based herbicide on larval dragonflies (Aeshna cyanea) and adult newts (Lissotriton vulgaris) in a laboratory-based experiment

Ujszegi¹,

Gál²,

Mikó³

et al. 2016

Acta Zool Acad Sci H

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“…At the same time residues of glyphosate and its primary metabolite aminomethylphosphonic acid (AMPA, Figure 5) were detected in the soil, in freshwater, and in the organisms that live there (Perez et al, 2011), in the crop products, in the animals that were fed with them, and in humans, too. Therefore, studies were initiated to determine whether continuous exposure to glyphosate leads to unwanted effects to the environment, such as soil microorganisms (Kremer and Means, 2009), insects (Saska et al, 2016), fish (Giannini, 2013), and to humans.…”

Section: Fate In the Environment And Side Effectsmentioning

confidence: 97%

On glyphosate

Kőmíves¹,

Schröder²

2016

Ecocycles

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“…Using glyphosate in the compound of herbicides over the last four decades has turned out to be efficient (Benbrook, 2016). It is used due to absence of direct risks for health of people and animals or absence of tendency towards bioaccumulation in the trophic networks (Lund-Høie & Friestad, 1986;Luis et al, 2011;Landrigan & Belpoggi, 2018). But its application has increasingly fallen under question, and thus its impact on the environment, living organisms and people should be tested (Mao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Combined effect of glyphosate, saccharin and sodium benzoate on the gut microbiota of rats

Bilan

Lieshchova

Tishkina

et al. 2019

Regul. Mech. Biosyst.

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Glyphosate is the main component of many broadly used herbicides due to its safety for humans and animals. It is known that the remains of glyphosate are present in allowable doses in fodders and food products, and, consumrd in low doses, it is found in insignificant amounts in milk, eggs and even in the internal organs (liver, kidneys) of animals. For determining combined impact of glyphosate and the commonest food additives on the composition of microbiota of animals, four groups of laboratory male rats were formed, which during 42 days consumed pure water without any restrictions; 1% aqueous solution of glyphosate; 1% solution of glyphosate in combination with 1% solution of sodium benzoate; 1% solution of glyphosate with 1% solution of saccharin. After killing the animals, 1 g of feces were collected and by serial dilutions with 10–1 to 10–9 sterile physiologic solution, a microbiological analysis was undertaken. Out of each dilution an inoculation of the studied material to the elective growth media was performed, by 0.1 cm3, then the material was incubated in a thermostat (24–72 hours, temperature 37 °С), the results were recorded after 24–72 h. The microorganisms were identified by studying morphological parameters, tinctorial, cultural and enzymic properties. Results are provided in CFU/g (colony-forming unit per gramm) of feces. The impact of glyphosate and glyphosate with food additives led to no changes in the number of Escherichia coli and emergence of this species of microorganism with changed enzymic activity. Also no changes occurred in the number of microorganisms of Bifidobactrium and Lactobacillus spp. Addition of glyphosate, and also glyphosate in combination with saccharin to the diet contributes to broader reproduction of microorganisms of Klebsiella, Citrobacter, Enterobacter and Pseudomonas genera. Mixtures of glyphosate and food additives allow conditionally pathogenic yeast-like Candida fungi (Candida glabrata and C. albicans) to spread more widely in the intestine. Significant fluctuations in the number of Enterococcus spp. bacteria genus were observed: by 80 times within range of each of the three experimental groups of rats with addition of herbicide with benzoate and saccharin to the diet.

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Effects of Herbicide Glyphosate and Glyphosate-Based Formulations on Aquatic Ecosystems

Cited by 25 publications

References 102 publications

No effect of a glyphosate-based herbicide on larval dragonflies (Aeshna cyanea) and adult newts (Lissotriton vulgaris) in a laboratory-based experiment

No effect of a glyphosate-based herbicide on larval dragonflies (Aeshna cyanea) and adult newts (Lissotriton vulgaris) in a laboratory-based experiment

On glyphosate

Combined effect of glyphosate, saccharin and sodium benzoate on the gut microbiota of rats

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