A temporal perspective on aquatic subsidy: Bti affects emergence of Chironomidae

Ecotoxicology and Environmental Safety, Год журнала: 2023, Номер 250, С. 114503 - 114503

Опубликована: Янв. 1, 2023

Emerging aquatic insects serve as one link between and adjacent riparian food webs via the flux of energy nutrients. These provide high-quality subsidy to terrestrial predators. Thus, any disturbance emergence processes may cascade higher trophic levels lead effects across ecosystem boundaries. One stressor with potential impact on non-target insects, especially non-biting midges (Diptera: Chironomidae), is widely used mosquito control agent Bacillus thuringiensis var. israelensis (Bti). In a field experiment, we investigated emerging insect communities from Bti-treated (three applications, maximum rate) floodplain pond mesocosms (FPMs) over 3.5 months for changes in their composition, diversity well dynamics individual weight emerged time. Bti treatments altered community compositions entire study duration - an effect mainly attributed earlier (∼10 days) reduced (∼26%) peak Chironomidae, dominant family (88% collected individuals). The most reasonable explanation this significant alteration less resource competition caused by decrease chironomid larval density due lethal Bti. This supported Chironomidae treated FPMs (∼21%) during application (April May). A temporal shift can cause availability prey linked ecosystems. Consequently, predators be affected lack appropriate leading bottom-up top-down webs. indicates importance responsible elaborated use additionally, highlights need include perspective evaluations stressors aquatic-terrestrial meta-ecosystems.

Язык: Английский

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The sexual reproduction of the nontarget planarian Girardia tigrina is affected by ecologically relevant concentrations of difenoconazole: new sensitive tools in ecotoxicology

Environmental Science and Pollution Research, Год журнала: 2022, Номер 29(18), С. 27095 - 27103

Опубликована: Янв. 3, 2022

Язык: Английский

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Effects of Polyurethane Small-Sized Microplastics in the Chironomid, Chironomus riparius: Responses at Organismal and Sub-Organismal Levels

International Journal of Environmental Research and Public Health, Год журнала: 2022, Номер 19(23), С. 15610 - 15610

Опубликована: Ноя. 24, 2022

Freshwater provides valuable services and functions to humankind. However, macroinvertebrates that underpin the delivery of many those ecosystem are under an additional threat caused by microplastic pollution. Chironomids one most abundant groups in these environments sensitive microplastics. This investigation addressed effects polyurethane (PU-MPs; 7.0–9.0 µm) on chironomid Chironomus riparius at organism sub-organism levels. For this purpose, two assays were carried out: (i) addressing PU-MPs C. partial life cycle traits (larval size emergence parameters) a 28 d assay considering concentrations up 750 mg/Kg, (ii) larvae behaviour (locomotion) as well biochemical responses (oxidative damage, aerobic energy production, reserves) 10 environmentally relevant concentration with no observed previous history (no effect concentration; NOEC = (375 mg/kg). Exposure did not affect larval length nor cumulative time emergence. Conversely, when exposed for days, contaminated revealed be lighter (but smaller less nutritionally affected terms more active foraging, which was reflected activation their metabolism assessing electron transport chain proxy. Notwithstanding, originate observable costs, either protein, lipid, or sugar contents larvae, may justify absence growth Therefore, increased production used locomotion functioning expense fraction should have been allocated weight individuals. A long-term exposure involving multigenerational assessment would bring intel potential (cumulative) sub-lethal fitness.

Язык: Английский

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Toxicokinetics and bioaccumulation of silver sulfide nanoparticles in benthic invertebrates in an indoor stream mesocosm

The Science of The Total Environment, Год журнала: 2023, Номер 873, С. 162160 - 162160

Опубликована: Фев. 11, 2023

Язык: Английский

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A Dangerous Couple: Sequential Effect of Phosphorus Flame-Retardant and Polyurethane Decrease Locomotor Activity in Planarian <em>Girardia tigrina</em>

Опубликована: Апрель 15, 2024

Understanding the interplay among organophosphorus flame-retardants (OPFRs), microplastics, and freshwater organisms is crucial for unravelling dynamics within environments foreseeing potential impacts of organic pollutants plastic contamination. For that purpose, present research assessed exposure impact 10 mg L&ndash;1 flame-retardant alumin-ium diethylphosphinate (ALPI), &mu;g mg&ndash;1liver microplastics polyurethane (PU), combina-tion ALPI PU on planarian Girardia tigrina. The G. tigrina to both revealed a sequential effect, i.e., decrease in locomotor activity, while other molecular biomarkers (oxidative stress metabolic response) remained unaffected. Despite this fact, it was possible observe range (min-max) responses exposed or-ganisms were altered, particular case electron transport system, cholinesterase glutathione S-transferase, catalase levels total proteins, showing energetic costs detoxification antioxidant capacity might be causing less energy allocated activity. By examining physiological, behavioural, ecological planarians these pollutants, insights can gained into broader ecosystem-level effects inform strategies mitigating environmental risks associated with OPFRs microplastic pol-lution environments.

Язык: Английский

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A Dangerous Couple: Sequential Effect of Phosphorus Flame-Retardant and Polyurethane Decrease Locomotor Activity in Planarian Girardia tigrina

Biology, Год журнала: 2024, Номер 13(5), С. 337 - 337

Опубликована: Май 12, 2024

Understanding the interplay among organophosphorus flame retardants (OPFRs), microplastics, and freshwater organisms is crucial for unravelling dynamics within environments foreseeing potential impacts of organic pollutants plastic contamination. For that purpose, present research assessed exposure impact 10 mg L−1 flame-retardant aluminium diethylphosphinate (ALPI), μg mg−1liver microplastics polyurethane (PU), combination ALPI PU on planarian Girardia tigrina. The to both revealed a sequential effect, i.e., decrease in locomotor activity, while oxidative stress biomarkers (total glutathione, catalase, glutathione S-transferase, lipid peroxidation) metabolic responses (cholinesterase electron transport system, lactate dehydrogenase) remained unaffected. Despite this fact, it was possible observe range physiological exposed varied, particular cases cholinesterase levels total proteins, showing energetic costs detoxification antioxidant capacity might be causing lesser amount energy allocated activity. By examining physiological, behavioural, ecological planarians these pollutants, insights can gained into broader ecosystem-level effects inform strategies mitigating environmental risks associated with OPFRs microplastic pollution environments.

Язык: Английский

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Responses of Freshwater Planarian Girardia tigrina to Fipronil-Based Insecticide: Survival, Behavioral and Physiological Endpoints

Diversity, Год журнала: 2022, Номер 14(9), С. 698 - 698

Опубликована: Авг. 23, 2022

Fipronil is a pyrazole insecticide used to control undesirable insect populations. Due its large-scale application, there the potential for surface waters’ contamination, with toxic action non-target organisms, and consequent impacts on aquatic ecosystems. Planarians are invertebrates these insecticides. They widespread in tropical freshwaters have been proposed as good candidates assess effects of freshwater systems contaminated by Thus, present study aims evaluate sublethal concentrations fipronil-based that may affect planarian physiology. After chronic exposure Regent 800 WG®, significant decrease locomotor velocity (LOEC—6.25 mg·L−1), regeneration auricles photoreceptors (LOEC—3.13 reproduction (fecundity—LOEC 12.5 mg·L−1) were observed. The results our demonstrate long-term can compromise while reinforcing need better investigation complementary parameters (such behavior, regeneration, reproduction) more accurate risk assessment commercial pesticide toxicity systems.

Язык: Английский

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Do bio-insecticides affect only insect species? Behavior, regeneration, and sexual reproduction of a non-target freshwater planarian

Environmental Science and Pollution Research, Год журнала: 2021, Номер 29(7), С. 10665 - 10674

Опубликована: Сен. 15, 2021

Язык: Английский

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Bioaccumulation but no biomagnification of silver sulfide nanoparticles in freshwater snails and planarians

The Science of The Total Environment, Год журнала: 2021, Номер 808, С. 151956 - 151956

Опубликована: Ноя. 26, 2021

Язык: Английский

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Behavioral Parameters of Planarians (Girardia tigrina) as Fast Screening, Integrative and Cumulative Biomarkers of Environmental Contamination: Preliminary Results

Water, Год журнала: 2021, Номер 13(8), С. 1077 - 1077

Опубликована: Апрель 14, 2021

The present study aims to use behavioral responses of the freshwater planarian Girardia tigrina assess impact anthropogenic activities on aquatic ecosystem watershed Araguaia-Tocantins (Tocantins, Brazil). Behavioral are integrative and cumulative tools that reflect changes in energy allocation organisms. Thus, feeding rate locomotion velocity (pLMV) were determined effects induced by laboratory exposure adult planarians water samples collected region Tocantins-Araguaia, identifying sampling points affected contaminants. Furthermore, physicochemical microbiological parameters, as well presence inorganic compounds (dissolved aluminum, total barium, chloride, dissolved iron, fluoride, manganese, nitrates, nitric nitrogen, sulfate, zinc) surfactants, each specific point. biomarkers (feeding pLMV) significantly decreased when organisms exposed from four municipalities (Formoso do Araguaia, Lagoa da Confusão, Gurupi Porto Nacional), sites Tocantins-Araguaia hydrographic region—TAHR. Both up ~37–39% compared ASTM medium only. Our results showed these can be used for fast screening monitoring environmental ecosystems, since a decrease locomotor activity was observed impacted activities. However, absence some does not represent contamination, several other classes contaminants determined. In negative results, deleterious might only indicative potential such affect performance planarians. This approach seems useful determine contaminated ecosystems biomonitoring purposes. knowledge will help develop programs decide appropriate analysis.

Язык: Английский

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