Field evidence supports former experimental claims on the stimulatory effect of glyphosate on picocyanobacteria communities

Berman, Manuel Castro; Llames, María Eugenia del Rosario; Minotti, Priscilla Gail; Fermani, Paulina; Quiroga, María Victoria; Ferraro, Marcela; Metz, Sebastián; Zagarese, Horacio

doi:10.1016/j.scitotenv.2019.134601

Cited by 22 publications

(15 citation statements)

References 56 publications

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“…2011, Harris and Smith 2016); that is, even in observational studies of natural ecosystems (Berman et al. 2020). The parallel study by Fugère et al.…”

Section: Discussionmentioning

confidence: 99%

“…Glyphosate acid contains 18.3% P, implying that its presence in water represents an additional source of P that may be used by microbial and algal communities, either in the form of glyphosate or degraded products (Hove-Jensen et al 2014, Wang et al 2016, Brock et al 2019, Lu et al 2020. Other studies have reported increases in phytoplankton in the presence of glyphosate, attributing this fertilizing effect to glyphosate-derived P (P erez et al 2007, Forlani et al 2008, Saxton et al 2011, Harris and Smith 2016; that is, even in observational studies of natural ecosystems (Berman et al 2020). The parallel study by Fug ere et al (2020) showed that glyphosate led to dose-dependent increases in TP and chl a concentrations in our ponds, presumably as a result of phytoplankton P limitation (initial N:P molar ratio ~33).…”

Section: Community Responses To Agrochemicalsmentioning

confidence: 99%

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Widespread agrochemicals differentially affect zooplankton biomass and community structure

Hébert

Fugère

Beisner

et al. 2021

Ecological Applications

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Anthropogenic environmental change is causing habitat deterioration at unprecedented rates in freshwater ecosystems. Despite increasing more rapidly than many other agents of global change, synthetic chemical pollution—including agrochemicals such as pesticides—has received relatively little attention in freshwater community and ecosystem ecology. Determining the combined effects of multiple agrochemicals on complex biological systems remains a major challenge, requiring a cross‐field integration of ecology and ecotoxicology. Using a large‐scale array of experimental ponds, we investigated the response of zooplankton community properties (biomass, composition, and diversity metrics) to the individual and joint presence of three globally widespread agrochemicals: the herbicide glyphosate, the neonicotinoid insecticide imidacloprid, and nutrient fertilizers. We tracked temporal variation in zooplankton biomass and community structure along single and combined pesticide gradients (each spanning eight levels), under low (mesotrophic) and high (eutrophic) nutrient‐enriched conditions, and quantified (1) response threshold concentrations, (2) agrochemical interactions, and (3) community resistance and recovery. We found that the biomass of major zooplankton groups differed in their sensitivity to pesticides: ≥0.3 mg/L glyphosate elicited long‐lasting declines in rotifer communities, both pesticides impaired copepods (≥3 µg/L imidacloprid and ≥5.5 mg/L glyphosate), whereas some cladocerans were highly tolerant to pesticide contamination. Strong interactive effects of pesticides were only recorded in ponds treated with the combination of the highest doses. Overall, glyphosate was the most influential driver of aggregate community properties of zooplankton, with biomass and community structure responding rapidly but recovering unequally over time. Total community biomass showed little resistance when first exposed to glyphosate, but rapidly recovered and even increased with glyphosate concentration over time; in contrast, taxon richness decreased in more contaminated ponds but failed to recover. Our results indicate that the biomass of tolerant taxa compensated for the loss of sensitive species after the first exposure, conferring greater community resistance upon a subsequent contamination event; a case of pollution‐induced community tolerance in freshwater animals. These findings suggest that zooplankton biomass may be more resilient to agrochemical pollution than community structure; yet all community properties measured in this study were affected at glyphosate concentrations below common water quality guidelines in North America.

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“…2011, Harris and Smith 2016); that is, even in observational studies of natural ecosystems (Berman et al. 2020). The parallel study by Fugère et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Community Responses To Agrochemicalsmentioning

confidence: 99%

Widespread agrochemicals differentially affect zooplankton biomass and community structure

Hébert

Fugère

Beisner

et al. 2021

Ecological Applications

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show abstract

“…The herbicide glyphosate has been shown to affect aquatic microbial community structure in a variety of natural environments and experimental setups (Berman et al, 2020; Lu et al, 2020; Muturi et al, 2017; Stachowski‐Haberkorn et al, 2008). Likewise, the insecticide imidacloprid may disrupt aquatic food webs (Yamamuro et al, 2019), with potential, yet poorly explored consequences for bacterioplankton.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast to the recovery pattern observed in Agrobacterium exposed to both the independent and combined highest concentrations of glyphosate (Figure S6a), the modeled abundance of Flavobacterium (Figure S6b) and Azospirillum (Figure S6c) followed distinct patterns in these two treatments. The herbicide glyphosate has been shown to affect aquatic microbial community structure in a variety of natural environments and experimental setups (Berman et al, 2020;Lu et al, 2020;Muturi et al, 2017;Stachowski-Haberkorn et al, 2008). Likewise, the insecticide imidacloprid may disrupt aquatic food webs (Yamamuro et al, 2019), to manipulate and replicate the exposure of complex lake bacterial communities to agricultural chemical pollutants commonly found in freshwaters (Alexander et al, 2016).…”

Section: Dynamics Of the Taxa Most Responsive To Treatmentsmentioning

confidence: 99%

Resistance, resilience, and functional redundancy of freshwater bacterioplankton communities facing a gradient of agricultural stressors in a mesocosm experiment

et al. 2021

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Agricultural pollution with fertilizers and pesticides is a common disturbance to freshwater biodiversity. Bacterioplankton communities are at the base of aquatic food webs, but their responses to these potentially interacting stressors are rarely explored. To test the extent of resistance and resilience in bacterioplankton communities faced with agricultural stressors, we exposed freshwater mesocosms to single and combined gradients of two commonly used pesticides: the herbicide glyphosate (0-15 mg/L) and the neonicotinoid insecticide imidacloprid (0-60 μg/L), in high or low nutrient backgrounds. Over the 43-day experiment, we tracked variation in bacterial density with flow cytometry, carbon substrate use with Biolog EcoPlates, and taxonomic diversity and composition with environmental 16S rRNA gene amplicon sequencing. We show that only glyphosate (at the highest dose, 15 mg/L), but not imidacloprid, nutrients, or their interactions measurably changed community structure, favouring members of the Proteobacteria including the genus Agrobacterium.However, no change in carbon substrate use was detected throughout, suggesting functional redundancy despite taxonomic changes. We further show that communities are resilient at broad, but not fine taxonomic levels: 24 days after glyphosate application the precise amplicon sequence variants do not return, and tend to be replaced by phylogenetically close taxa. We conclude that high doses of glyphosate -but still within commonly acceptable regulatory guidelines -alter freshwater bacterioplankton by favouring a subset of higher taxonomic units (i.e., genus to phylum) that transiently thrive in the presence of glyphosate. Longer-term impacts of glyphosate at finer taxonomic resolution merit further investigation.

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“…Comprehensive investigations at the community and ecosystem levels have unveiled alterations through trophic webs, and some pesticides have exhibited biomagnification phenomena. For instance, glyphosate, the most widely used pesticide [249], has been found to selectively enhance the growth of pico-cyanobacteria in the laboratory, mesocosm, and also in field studies [250,251].…”

Section: Pesticidesmentioning

confidence: 99%

Multi-Interacting Natural and Anthropogenic Stressors on Freshwater Ecosystems: Their Current Status and Future Prospects for 21st Century

Bănăduc,

Curtean-Bănăduc,

Barinova

et al. 2024

Water

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The inheritance of historic human-induced disruption and the fierceness of its impact change aquatic ecosystems. This work reviews some of the main stressors on freshwater ecosystems, focusing on their effects, threats, risks, protection, conservation, and management elements. An overview is provided on the water protection linked to freshwater stressors: solar ultraviolet radiation, thermal pollution, nanoparticles, radioactive pollution, salinization, nutrients, sedimentation, drought, extreme floods, fragmentation, pesticides, war and terrorism, algal blooms, invasive aquatic plants, riparian vegetation, and invasive aquatic fish. Altogether, these stressors build an exceptionally composite background of stressors that are continuously changing freshwater ecosystems and diminishing or even destroying their capability to create and maintain ongoing natural healthy products and essential services to humans. Environmental and human civilization sustainability cannot exist without the proper management of freshwater ecosystems all over the planet; this specific management is impossible if the widespread studied stressors are not deeply understood structurally and functionally. Without considering each of these stressors and their synergisms, the Earth’s freshwater is doomed in terms of both quantitative and qualitative aspects.

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Field evidence supports former experimental claims on the stimulatory effect of glyphosate on picocyanobacteria communities

Cited by 22 publications

References 56 publications

Widespread agrochemicals differentially affect zooplankton biomass and community structure

Widespread agrochemicals differentially affect zooplankton biomass and community structure

Resistance, resilience, and functional redundancy of freshwater bacterioplankton communities facing a gradient of agricultural stressors in a mesocosm experiment

Multi-Interacting Natural and Anthropogenic Stressors on Freshwater Ecosystems: Their Current Status and Future Prospects for 21st Century

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