Systemic pesticides in a solitary bee pollen food store affect larval development and increase pupal mortality

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 915, P. 170048 - 170048

Published: Jan. 12, 2024

Language: Английский

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Local and landscape factors differently influence health and pollination services in two important pollinator groups

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 959, P. 178330 - 178330

Published: Jan. 1, 2025

Agricultural management significantly affects insects, especially pollinators, which are crucial for crop pollination and biodiversity. In agricultural landscapes, various factors spanning different spatial scales known to affect pollinator health, which, in turn, can influence services. However, the importance of these driving health performance groups remains unclear. Using a long-term biodiversity research platform, German Biodiversity Exploratories, we investigated links between local landscape-level land-use, services common bumblebee Bombus lapidarius syrphid fly Episyrphus balteatus, by measuring traits as proxies Because their life histories, expected territorial bumblebees be more vulnerable land-use intensification at both levels, compared with migratory flies. Both environmental (climate) across affected mostly via changes body size: High intensity reduced size, whereas higher ambient air temperature decreased size. Increasing proportions intensively managed areas landscape level viral infections species. Additionally, climate changed cuticular chemical profile, is essential communication social insects. intensive had an indirect negative effect on flower cover Pollination species were linked Thus, differently: intensification, while flies resilient potentially due mobility. As services, our results indicate that poses high risk crops pollinated small home ranges.

Language: Английский

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The challenge of balancing fungicide use and pollinator health

Advances in insect physiology, Journal Year: 2023, Volume and Issue: unknown, P. 117 - 190

Published: Jan. 1, 2023

Language: Английский

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Land-use-associated stressors interact to reduce bumblebee health at the individual and colony level

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(2008)

Published: Oct. 11, 2023

In agricultural landscapes, bees face a variety of stressors, including insecticides and poor-quality food. Although both stressors individually have been shown to affect bumblebee health negatively, few studies focused on stressor interactions, scenario expected in intensively used landscapes. Using the Bombus terrestris , key pollinator we conducted fully factorial laboratory experiment starting at nest initiation. We assessed effects food quality insecticides, alone interaction, traits various levels, some which rarely studied. Pollen with diluted nutrient content (low quality) reduced ovary size delayed colony development. Wing asymmetry, indicating developmental stress, was increased during insecticide exposure interactions poor food, whereas body size. Both their interaction changed workers’ chemical profile worker immune response. Our findings suggest that combined nutritional stress reduce individual thus possibly affecting performance, such as development reproduction, stability plant–pollinator networks. The synergistic highlight need combining risk assessments when studying complex anthropogenic outcomes.

Language: Английский

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Field agrochemical exposure impacts locomotor activity in wild bumblebees

Ecology, Journal Year: 2024, Volume and Issue: 105(6)

Published: June 1, 2024

Abstract Agricultural intensification has been identified as one of the key causes global insect biodiversity losses. These losses have further linked to widespread use agrochemicals associated with modern agricultural practices. Many these chemicals are known negative sublethal effects on commercial pollinators, such managed honeybees and bumblebees, but less is about impacts wild bees. Laboratory‐based studies pollinators consistently shown that pesticide exposure can impact bee behavior, cascading foraging performance, reproductive success, pollination services. However, typically assess only chemical, neglecting complexity real‐world multiple other stressors. In summer 2020, we collected wild‐foraging workers common eastern bumblebee, Bombus impatiens , from five squash ( Cucurbita ) sites (organic conventional farms), selected represent a range agrochemical, including neonicotinoid insecticide, use. For each bee, measured two behaviors relevant success previously be impacted by exposure: sucrose responsiveness locomotor activity. Following behavioral testing, used liquid chromatography–tandem mass spectrometry (LC–MS/MS) chemical analysis detect quantify presence 92 in bumblebee. Bees our did not vary expected. While found limited occurrence neonicotinoids, fungicides (azoxystrobin difenoconazole) were detected at all sites, synergist piperonyl butoxide (PBO) was present 123 We bumblebees contained higher levels PBO active, this effect stronger for larger bumblebee workers. unlikely direct cause reduction activity, it could an indicator pyrethroids and/or insecticides unable directly quantify, which frequently tank‐mixed during applications crops. find relationship between agrochemical responsiveness. To knowledge, first evidence

Language: Английский

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Low toxicity crop fungicide (fenbuconazole) impacts reproductive male quality signals leading to a reduction of mating success in a wild solitary bee

Journal of Applied Ecology, Journal Year: 2022, Volume and Issue: 59(6), P. 1596 - 1607

Published: April 24, 2022

Abstract Recent reports on bee health suggest that sublethal doses of pesticides have negative effects wild reproduction and ultimately their population growth. Females the solitary horned mason Osmia cornuta , evaluate thoracic vibrations odours males to assess male quality. When certain criteria are met, female accepts copulates. However, these signals were found be modified by in other hymenopterans. Here, we tested whether a commonly used fungicide (Fenbuconazole) impact quality mating success O. . Males exposed fenbuconazole exhibited reduced an altered cuticular hydrocarbon profile compared control bees. Moreover, less successful than males. Synthesis applications Our results indicate low toxicity can negatively affect reproductive altering behavioural chemical cues. This could explain decreasing pollinator populations pesticide‐polluted environment. study highlights need for more comprehensive approach, including behaviour cues, when testing new cautionary approach already crops.

Language: Английский

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Sublethal pesticide exposure decreases mating and disrupts chemical signaling in a beneficial pollinator

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 970, P. 179005 - 179005

Published: March 1, 2025

Language: Английский

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Romance in peril: A common pesticide impairs mating behaviours and male fertility of solitary bees (Osmia bicornis)

Chemosphere, Journal Year: 2025, Volume and Issue: 377, P. 144335 - 144335

Published: April 9, 2025

Language: Английский

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Consumption of pollen contaminated with field-realistic concentrations of fungicide causes sublethal effects in Bombus impatiens (Hymenoptera: Apidae) microcolonies

Environmental Entomology, Journal Year: 2024, Volume and Issue: 53(4), P. 706 - 715

Published: May 27, 2024

Bumble bees are declining across the globe. The causes of this decline have been attributed to a variety stressors, including pesticides. Fungicides type pesticide that has understudied in context bumble bee health. As result, fungicides often applied flowering plants without consideration pollinator exposure. Recent work demonstrates sublethal effects bees, but little is known about how much fungicide it takes cause these effects. To address gap literature, we fed microcolonies common eastern (Bombus impatiens CressonHymenoptera: ApidaeHymenoptera: Apidae) pollen contaminated with range concentrations. We chose concentrations based on and nectar were reported literature. Results revealed later-stage pupae newly emerged males potentially sensitive exposure, showing smaller size reduced fat reserves at intermediate levels contamination. Compared control, intermediated fungicide-contaminated led increased pupal mortality delayed male emergence. Contrary expectations, higher did not exhibit linear relationship negative impacts, suggesting nuanced Because body emergence timing important aspects reproductive behavior, results implications for mating success, disrupting colony development.

Language: Английский

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Advances in Catalytic Asymmetric Construction of Quaternary Stereogenic Centers by Conjugate Addition to β,β‐Disubstituted Nitroalkenes

Advanced Synthesis & Catalysis, Journal Year: 2023, Volume and Issue: 365(17), P. 2789 - 2817

Published: July 6, 2023

Abstract Quaternary stereogenic centers are of great importance because their prevalence in a series bioactive natural products and pharmaceuticals. Although the catalytic asymmetric construction these highly congested poses formidable challenge, this field has been extensively explored past few decades, several elegant strategies, such as conjugate addition to β,β‐disubstituted nitroalkenes, have developed. The resultant β‐nitro quaternary stereocenters can be conveniently transformed into corresponding β‐amino commonly found compounds. This review summarizes recent advances all‐carbon or hetero‐carbon via metal‐catalyzed organocatalyzed focusing on scope, applications, mechanisms reactions.

Language: Английский

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