Heatwaves, elevated temperatures, and a pesticide cause interactive effects on multi-trophic levels of a freshwater ecosystem

Environmental Pollution, Journal Year: 2023, Volume and Issue: 327, P. 121498 - 121498

Published: March 23, 2023

Climate impacts of elevated temperatures and more severe frequent weather extremes like heatwaves are globally becoming discernible on nature. While a mechanistic understanding is pivotal for ecosystem management, stressors pesticides may interact with warming, leading to unpredictable effects freshwater ecosystems. These multiple stressor studies scarce experimental designs often lack environmental realism. To investigate the effects, we conducted microcosm experiment 48 days comprising benthic macroinvertebrates, zooplankton, phytoplankton, macrophytes, microbes. The fungicide carbendazim (100 μg/L) was investigated combined temperature scenarios representing (+4 °C) or (+0 +8 °C), both applied similar energy input daily fluctuating ambient (18 °C ± 1.5 which served as control. Measurements showed highest dissipation in water under followed by temperatures. Average concentrations were about 50% 16% sediment nominal concentration. In heated cosms, zooplankton community dynamics revealed an unexpected shift from Rotifera Cladocera Copepoda nauplii, indicating variations their thermal sensitivity, tolerance resilience. Notably, warming shaped responses similarly, suggesting heat intensity rather than distribution patterns determined structure. Heatwaves led significant early longer-lasting adverse that exacerbated over time being most sensitive likely due interactions. Finally, structural equation model demonstrated relationships between macrophytes significantly negative whereas positive macroinvertebrate abundances. relationship feeding abundance masked temperature-affected microbial leaf litter decomposition. Despite communities, our study highlights increased pesticide threat extremes. More intense thus cause alterations assemblages will adversely affect ecosystem's processes functions.

Language: Английский

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High pollution loads engineer oxygen dynamics, ecological niches, and pathogenicity shifts in freshwater environments

Journal of Hazardous Materials Advances, Journal Year: 2024, Volume and Issue: 14, P. 100425 - 100425

Published: March 28, 2024

The current study comprehensively reviews the ecological niche and pathogenicity shift in freshwater microbial community response to stress induced by a high pollution load. provides unique understanding of how change oxygen level tends affect survival aquatic biota delving into an increase pollutant load affects stability. review indicated that loads alter balance resources such as organic matter, dissolved gases, light penetration, essential nutrients. This causes dynamics species-dependent microorganisms environments. also alteration genome microorganisms, leading development antibiotic resistance genes thereby increasing microorganisms. dynamic created lowers natural defence strategies environment, efficacy pathogens infest respective host. A detailed mechanisms involved exotoxins production interaction with will give important insight effect exotoxin. is importance both environmental medical interests. because not only detrimental organisms but resists improperly treated drinking water. Such water could retrogress wellness quality life when used continuously. An extensive on specific pollutants cause microbiota provide impact stability environment.

Language: Английский

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Sensitivity ecology and evolution, toxicology organism assessment model in the use of chemical applications for the management of toxic substances

Deleted Journal, Journal Year: 2024, Volume and Issue: 44(5), P. 890 - 908

Published: June 22, 2024

The sensitivity of organisms to toxic substances is a pivotal facet in ecological and toxicological research. Understanding differential sensitivity's basis its evolutionary underpinnings imperative for anticipating managing the repercussions toxins on organisms. Our comprehensive analysis reveals that physiological traits, encompassing metabolic capacity, membrane transporters, wield significant influence determining organism toxins. Evolutionary processes, including natural selection genetic variations also contribute tolerance or resistance substances. This review focuses existing research concerning sensitivity, particularly emphasizing toxicokinetics, toxicodynamics, factors underlie Furthermore, it explores practical applications predictive ecotoxicology chemical management identifies promising prospects models. integration these insights into development application can usher era effective environmentally benign chemicals, thereby curtailing impacts fostering harmonious coexistence between their surroundings.

Language: Английский

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Limitations of wastewater treatment plants in removing trace anthropogenic biomarkers and future directions: A review

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 281, P. 116610 - 116610

Published: June 22, 2024

This review highlights the limitations faced by conventional wastewater treatment plants (WWTPs) in effectively removing contaminants of emerging concern (CECs), heavy metals (HMs), and Escherichia coli (E. coli). emphasises current methods advocates for innovative approaches to enhance removal efficiency. By following PRISMA guidelines, study systematically reviewed relevant literature on detecting remedying these pollutants facilities. Conventional struggle eliminate CECs, HMs, E. owing their small size, persistence, complex nature. The suggests upgrading WWTPs with advanced tertiary processes significantly improve contaminant removal. calls cost-effective parameters standardised assessment techniques fate MPs WRRFs. It recommends integrating insights from mass-balance model studies WWTP overcome modelling challenges ensure reliability. In conclusion, this underscores urgent need advancements mitigate environmental impact trace anthropogenic biomarkers. Future efforts should focus conducting comprehensive studies, implementing methods, optimising management practices

Language: Английский

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Multiple-stressor exposure of aquatic food webs: Nitrate and warming modulate the effect of pesticides

Water Research, Journal Year: 2022, Volume and Issue: 216, P. 118325 - 118325

Published: March 19, 2022

Language: Английский

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Explicit Consideration of Temperature Improves Predictions of Toxicokinetic–Toxicodynamic Models for Flupyradifurone and Imidacloprid in Gammarus pulex

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(22), P. 15920 - 15929

Published: Oct. 25, 2022

In the face of global climate change, where temperature fluctuations and frequency extreme weather events are increasing, it is needed to evaluate impact on ecological risk assessment chemicals. Current state-of-the-art mechanistic effect models, such as toxicokinetic–toxicodynamic (TK–TD) often do not explicitly consider a modulating factor. This study implemented in widely used modeling framework, General Unified Threshold model for Survival (GUTS). We tested using data from toxicokinetic toxicity experiments with Gammarus pulex exposed insecticides imidacloprid flupyradifurone. The revealed increased TK rates increasing under chronic exposures. Using Arrhenius equation, we could include influence into modeling. By further testing different approaches, differences scaling TD parameters be identified, urging investigations underlying mechanisms. Finally, our results show that predictions TK–TD models improve if explicitly.

Language: Английский

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Heat waves rather than continuous warming exacerbate impacts of nutrient loading and herbicides on aquatic ecosystems

Environment International, Journal Year: 2022, Volume and Issue: 168, P. 107478 - 107478

Published: Aug. 18, 2022

Submerged macrophytes are vital components in shallow aquatic ecosystems, but their abundances have declined globally. Shading by periphyton and phytoplankton/turbidity plays a major role this decline, the competing primary producers subject to complex influence of multiple stressors such as increasing temperatures, nutrient loading herbicides. Their joint impact has rarely been tested is difficult predict due potentially opposing effects on different producers, interactions grazers. Here, we used 48 mesocosms (2500 L) simulate lakes dominated two typical submerged macrophytes, bottom-dwelling Vallisneria denseserrulata canopy-forming Hydrilla verticillata, associated food web components. We applied combination loading, continuous warming, heat waves glyphosate-based herbicides test how these interactively growth phytoplankton producers. Warming or alone did not affect abundance, negatively influenced biomass V. denseserrulata. Nutrient increased water turbidity thus affected macrophyte biomass, particularly for denseserrulata, shading. Glyphosate each producer under ambient temperatures. However, facilitated combined glyphosate treatments more than warming. As consequence, H. verticillata was lowest conditions indicating potential decline. Our study demonstrated that alter can eventually lead loss communities shift dominance. These results show risks ponds agricultural landscapes underline need stressor studies base future management.

Language: Английский

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Environmental variability in aquatic ecosystems: Avenues for future multifactorial experiments

Limnology and Oceanography Letters, Journal Year: 2022, Volume and Issue: 8(2), P. 247 - 266

Published: Oct. 22, 2022

Abstract The relevance of considering environmental variability for understanding and predicting biological responses to changes has resulted in a recent surge variability‐focused ecological research. However, integration findings that emerge across studies identification remaining knowledge gaps aquatic ecosystems remain critical. Here, we address these aspects by: (1) summarizing relevant terms research including the components (characteristics) key interactions when multiple factors; (2) identifying conceptual frameworks consequences single multifactorial scenarios; (3) highlighting challenges bridging theoretical experimental involving transitioning from simple more complex (4) proposing improved approaches overcome current mismatches between predictions observations; (5) providing guide designing integrated experiments scales, degrees control, complexity light their specific strengths limitations.

Language: Английский

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Thermal Performance Curves in a Polluted World: Too Cold and Too Hot Temperatures Synergistically Increase Pesticide Toxicity

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(8), P. 3270 - 3279

Published: Feb. 14, 2023

Ecotoxicological studies typically cover only a limited part of the natural thermal range populations and ignore daily temperature fluctuations (DTFs). Therefore, we may miss important stressor interaction patterns have poor knowledge on how pollutants affect performance curves (TPCs), which is needed to improve insights into fate warming in polluted world. We tested single combined effects pesticide exposure DTFs TPCs low- high-latitude Ischnura elegans damselfly larvae. While chlorpyrifos did not any effect at intermediate mean temperatures (20–24 °C), it became toxic (reflecting synergisms) lower (≤16 °C, reduced growth) especially higher (≥28 survival temperatures, resulting more concave-shaped TPCs. Remarkably, these toxicity were largely consistent both latitudes hence across gradient. Moreover, magnified pesticide-induced reductions 34 °C. The TPC perspective allowed us identify different types (mainly additive vs synergistic) This highlights importance using gradients make realistic predictions about impact pesticides world

Language: Английский

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Thresholds and interactive effects of BPA-gradient and temperature on life history traits of Daphnia magna

Environmental Pollution, Journal Year: 2024, Volume and Issue: 355, P. 124186 - 124186

Published: May 19, 2024

Bisphenol A (BPA), a synthetic organic compound widely used in the production of plastics, is recognized as an emerging contaminant because its toxicity and potential risks associated with bioaccumulation organisms. Despite environmental hazards, there lack studies examining BPA mechanisms impact on various trophic levels, even fewer exploring whether global stressors such temperature can affect Our aim was to assess combined varying regimes life-history traits Daphnia magna. results revealed significant growth, reproduction, accumulated moulting D. magna, adverse effects primarily assimilation algae rather than present medium, pointing transfer mechanism. The interactive effect between demonstrated slight stimulatory low level magna growth rate under warming constant conditions, but inhibitory fluctuating temperatures. Additionally, threshold identified, below which became temperature-dependent. This study emphasizes crucial role considering predicting how toxins may within aquatic food webs.

Language: Английский

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