Herbaceous or Salix miyabeana ‘SX64’ narrow buffer strips as a means to minimize glyphosate and aminomethylphosphonic acid leaching from row crop fields

Hénault-Éthier, Louise; Lucotte, Marc; Moingt, Matthieu; Paquet, Serge; Maccario, Sophie; Smedbol, Élise; Gomes, Marcelo Pedrosa; Lepage, Laurent; Juneau, Philippe; Labrecque, Michel

doi:10.1016/j.scitotenv.2017.04.104

Cited by 32 publications

(15 citation statements)

References 63 publications

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“…2015, Hénault‐Ethier et al. 2017, Satiroff et al. 2021); but concentrations on the order of ng/L are common for both pesticides (Montiel‐Léon et al.…”

Section: Discussionmentioning

confidence: 99%

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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“…2015, Hénault‐Ethier et al. 2017, Satiroff et al. 2021); but concentrations on the order of ng/L are common for both pesticides (Montiel‐Léon et al.…”

Section: Discussionmentioning

confidence: 99%

Widespread agrochemicals differentially affect zooplankton biomass and community structure

Hébert

Fugère

Beisner

et al. 2021

Ecological Applications

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“…Regardless of whether glyphosate is transported immediately to waterways via runoff or is exported after a longer leaching process in the ground, the presence of glyphosate in surface waters is influenced by the timing, doses, and frequency of pesticide application, climate (eg rainfall intensity and frequency), hydrology (eg flow routes), and soil composition and structure (Kjaer et al 2005;Candela et al 2010). These variables influence the flow of glyphosate and the amount that reaches surface waters; reported concentrations in surface runoff can vary considerably, ranging from ~0.1 μg L −1 to as high as 5200 μg L −1 (Edwards et al 1980;Coupe et al 2011;Hénault-Ethier et al 2017).…”

Section: From Soil To Watermentioning

confidence: 99%

“…Traces of glyphosate have now been observed in nearly all water bodies in the Montérégie region monitored by the provincial government (Giroux 2015). Although maintenance of riparian buffer strips along waterways is a commonly employed preventive strategy in Québec (Figure 4), the results of a recent study indicate that the 3-m buffers required by legislation are ineffective at intercepting glyphosate (Hénault-Ethier et al 2017). compete for the same (limited) sorption sites, with phosphate-rich soils and fertilization (ie increasing P saturation) potentially reducing glyphosate sorption and enhancing its mobility (Gimsing et al 2004;Vereecken 2005; Figure 3).…”

Section: Glyphosate-phosphate Competition: Implications For P Losses mentioning

confidence: 99%

The overlooked impact of rising glyphosate use on phosphorus loading in agricultural watersheds

Hébert

Fugère

Gonzalez

2018

Frontiers in Ecol & Environ

106

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Glyphosate is the most extensively used pesticide worldwide. In addition to raising ecotoxicological concerns, the use of glyphosate adds phosphorus (P) to agricultural landscapes, influencing the accumulation and cycling of P in soil and nearby surface waters. Yet pesticides have been largely ignored when monitoring anthropogenic sources of P in agricultural watersheds. Estimating the supply of P derived from glyphosate use, both globally and in the US alone, we show that trends have markedly increased over the past two decades. Across the US, mean inputs of glyphosate‐derived P increased from 1.6 kg P km−2 in 1993 to 9.4 kg P km−2 in 2014, with values frequently exceeding 20 kg P km−2 in areas planted with glyphosate‐resistant crops. Although still a minor source of P relative to fertilizers, P inputs from glyphosate use have now reached levels comparable to those from sources for which P regulations were initiated in the past. We thus argue for greater recognition of glyphosate's influence on P flow in watershed research and management.

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“…These fast growing phreatophytic woody plants are frequently used in short rotation intensive culture (SRIC) for biomass production [1], often intended for bioenergy and biofuel processes [2]. Willows also show strong tolerance to several contaminants, such as nitrogen rich wastewater [3], trace elements (TEs) [4], various petroleum hydrocarbons compounds [5,6], as well as pesticides [7], making them effective riparian buffer strips in agricultural systems [8]. More recently, their utilization has been extended to treatment wetlands [9] as well as vegetation filters designed to treat landfill leachate [10].…”

Section: Introductionmentioning

confidence: 99%

Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

Faubert

Desjardins²,

Hijri

et al. 2021

Applied Sciences

Self Cite

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The Salix genus includes shrub species that are widely used in phytoremediation and various other phytotechnologies due to their advantageous characteristics, such as a high evapotranspiration (ET) rate, in particular when cultivated in short rotation intensive culture (SRIC). Observations made in past field studies suggest that ET and its impact on soil hydrology can also lead to increases in soil pollutant concentrations near shrubs. To investigate this, sections of a mature willow plantation (seven years old) were cut to eliminate transpiration (Cut treatment). Soil concentrations of polychlorinated biphenyls (PCBs), aliphatic compounds C10–C50, polycyclic aromatic hydrocarbons (PAHs) and five trace elements (Cd, Cr, Cu, Ni and Zn) were compared between the Cut and the uncut plots (Salix miyabeana ‘SX61’). Over 24 months, the results clearly show that removal of the willow shrubs limited the contaminants’ increase in the soil surface, as observed for C10–C50 and of 10 PAHs under the Salix treatment. This finding strongly reinforces a hypothesis that SRIC of willows may facilitate the migration of contaminants towards their roots, thus increasing their concentration in the surrounding soil. Such a “pumping effect” in a high-density willow crop is a prominent characteristic specific to field studies that can lead to counterintuitive results. Although apparent increases of contaminant concentrations contradict the purification benefits usually pursued in phytoremediation, the possibility of active phytoextraction and rhizodegradation is not excluded. Moreover, increases of pollutant concentrations under shrubs following migration suggest that decreases would consequently occur at the source points. Some reflections on interpreting field work results are provided.

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Herbaceous or Salix miyabeana ‘SX64’ narrow buffer strips as a means to minimize glyphosate and aminomethylphosphonic acid leaching from row crop fields

Cited by 32 publications

References 63 publications

Widespread agrochemicals differentially affect zooplankton biomass and community structure

Widespread agrochemicals differentially affect zooplankton biomass and community structure

The overlooked impact of rising glyphosate use on phosphorus loading in agricultural watersheds

Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

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