Traces of a Neonicotinoid Induce Precocious Foraging and Reduce Foraging Performance in Honey Bees

Environmental Science & Technology, Год журнала: 2019, Номер 53(14), С. 8252 - 8261

Опубликована: Июль 1, 2019

There is increasing worldwide concern about the impacts of pesticide residues on honey bees and bee colony survival, but how sublethal effects pesticides might cause failure remains highly controversial, with field data giving very mixed results. To explore trace levels neonicotinoid imidacloprid impacted foraging performance, we equipped RFID tags that allowed us to track their lifetime flight behavior. One group was exposed a concentration (5 μg/kg, ppb) in sugar syrup while larval stage. The caused start when younger as adults perform fewer orientation flights, reduced flights by 28%. magnitude delivered only during stage highlights severity for performance. Our suggest neonicotinoids could impact function imbalancing normal age based division labor reducing efficiency. Understanding this mechanism will help development interventions safeguard health.

Язык: Английский

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Decline of bumble bees in northeastern North America, with special focus on Bombus terricola

Biological Conservation, Год журнала: 2017, Номер 217, С. 437 - 445

Опубликована: Дек. 5, 2017

Язык: Английский

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Species Sensitivity to Toxic Substances: Evolution, Ecology and Applications

Frontiers in Environmental Science, Год журнала: 2020, Номер 8

Опубликована: Дек. 1, 2020

Because it is only possible to test chemicals for effects on a restricted range of species and exposure scenarios, ecotoxicologists are faced with significant challenge how translate the measurements in model into predictions impacts wider ecosystems. this challenge, within ecotoxicology there no more fundamental aspect than understand nature traits that determine sensitivity. To account uncertainties extrapolations risk assessment, “safety factors” or sensitivity distributions commonly used. While valuable as pragmatic tools, these approaches have mechanistic grounding. Here we highlight information increasingly available can be used potentially predict chemicals. We review current knowledge toxicokinetic, toxicodynamic, physiological, ecological contribute differences go discuss being make using correlative trait-based approaches, including comparisons target receptor orthologs. Finally, emerging associated tools enhance theoretical applied ecotoxicological research through improvements modeling, predictive ecotoxicology, distribution development, mixture toxicity chemical design, biotechnology application mechanistically informed monitoring.

Язык: Английский

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Pollinator Decline – An Ecological Calamity in the Making?

Science Progress, Год журнала: 2018, Номер 101(2), С. 121 - 160

Опубликована: Апрель 19, 2018

Since pollination by insects is vitally important for much of global crop production, and to provide services more widely throughout the planetary ecosystems, prospect an imminent 'pollination crisis', due a die-off flying insects, most disquieting, say least. Indeed, term 'ecological Armageddon' has been used in media. However, know whether or not wholesale decline pollinators (including non-bee species) occurring across world very difficult, insufficiency geographically widespread long-term data. Bees, as best documented species, can be seen suffering from chronic exposure range stressors, which include: loss abundance diversity flowers, suitable habitat them build nests; agrochemicals, including pesticides such neonicotinoids; infection parasites pathogens, many inadvertently spread actions humans. It likely that climate change may impact further on particular pollinators, example bumble bees, are cool-climate specialists. Moreover, co-operative element various different stress factors should noted; thus, example, known diminish detoxification mechanisms also immune responses, hence lowering resistance bees parasitic infections. conspicuous those wild - principally moths butterflies where data available, picture one significant population losses. Alarmingly, recent study Germany indicated biomass had occurred 76% less than three decades, sampled nature reserves country. Accordingly, fully answer question posed title this article 'pollinator ecological calamity making?' will require detailed, encompassing, species-inclusive, longer-term studies, but available evidence points clear 'probably', precautionary principle would suggest we afford ignore.

Язык: Английский

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Honey bee (Apis mellifera) gut microbiota promotes host endogenous detoxification capability via regulation of P450 gene expression in the digestive tract

Microbial Biotechnology, Год журнала: 2020, Номер 13(4), С. 1201 - 1212

Опубликована: Апрель 27, 2020

Summary There is growing number of studies demonstrating a close relationship between insect gut microbiota and insecticide resistance. However, the contribution honey bee to host detoxification ability has yet be investigated. In order address this question, we compared expression cytochrome P450s (P450s) genes deficient (GD) workers conventional community (CV) mortality rates pesticide residue levels GD CV treated with thiacloprid or tau ‐fluvalinate. Our results showed that promotes P450 enzymes in midgut, rate are significantly higher than those workers. Further comparisons tetracycline‐treated untreated demonstrated antibiotic‐induced dysbiosis leads attenuated midgut. The co‐treatment antibiotics pesticides reduced survival amount residues bees. Taken together, our symbiont could contribute health through modification xenobiotics pathways revealed potential negative impact health.

Язык: Английский

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