Worldwide decline of the entomofauna: A review of its drivers

Biological Conservation, Journal Year: 2019, Volume and Issue: 232, P. 8 - 27

Published: Jan. 31, 2019

Language: Английский

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Chronic exposure to neonicotinoids reduces honey bee health near corn crops

Science, Journal Year: 2017, Volume and Issue: 356(6345), P. 1395 - 1397

Published: June 30, 2017

Damage confirmed Early studies of the impacts neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that did not represent field-realistic levels chemicals or prevailing environmental conditions. Two studies, conducted different crops and two continents, now substantiate neonicotinoids diminish bee health (see Perspective by Kerr). Tsvetkov et al. find bees near corn are exposed to for 3 4 months via nontarget pollen, resulting in decreased survival immune responses, especially when coexposed a commonly used agrochemical fungicide. Woodcock , multicounty experiment rapeseed Europe, exposure from several sources reduces overwintering success colony reproduction both honeybees wild bees. These field results confirm negatively affect pollinator under realistic agricultural Science this issue p. 1395 1393 ; see also 1331

Language: Английский

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Drivers of colony losses

Current Opinion in Insect Science, Journal Year: 2018, Volume and Issue: 26, P. 142 - 148

Published: Feb. 8, 2018

Language: Английский

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An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems

Environmental Science and Pollution Research, Journal Year: 2017, Volume and Issue: 28(10), P. 11749 - 11797

Published: Nov. 9, 2017

Abstract New information on the lethal and sublethal effects of neonicotinoids fipronil organisms is presented in this review, complementing previous Worldwide Integrated Assessment (WIA) 2015. The high toxicity these systemic insecticides to invertebrates has been confirmed expanded include more species compounds. Most recent research focused bees ecological impacts have pollinators. Toxic other invertebrate taxa also covered predatory parasitoid natural enemies aquatic arthropods. Little new gathered soil organisms. impact marine coastal ecosystems still largely uncharted. chronic lethality insects crustaceans, strengthened evidence that chemicals impair immune system reproduction, highlights dangers particular insecticidal class (neonicotinoids fipronil), with potential greatly decrease populations arthropods both terrestrial environments. Sublethal fish, reptiles, frogs, birds, mammals are reported, showing a better understanding mechanisms vertebrates their deleterious growth, neurobehaviour most tested. This review concludes summary ecosystem services functioning, particularly pollination, biota, communities, thus reinforcing WIA conclusions (van der Sluijs et al. 2015).

Language: Английский

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Neonicotinoid exposure disrupts bumblebee nest behavior, social networks, and thermoregulation

Science, Journal Year: 2018, Volume and Issue: 362(6415), P. 683 - 686

Published: Nov. 8, 2018

Trouble at the hive Neonicotinoid pesticides cause mortality and decline in insect pollinators. One repeatedly noted effect is a reduction bee colony size. However, mechanism behind this unclear. Crall et al. performed complex real-time monitoring of bumblebee behavior within their nests (see Perspective by Raine). exposure reduced nurse caretaking behaviors, which affected productivity harmed thermoregulation. These changes acted together to decrease viability, even when was nonlethal. Science , issue p. 683 ; see also 643

Language: Английский

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Pesticide reduces bumblebee colony initiation and increases probability of population extinction

Nature Ecology & Evolution, Journal Year: 2017, Volume and Issue: 1(9), P. 1308 - 1316

Published: Aug. 9, 2017

Language: Английский

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Bees and pesticide regulation: Lessons from the neonicotinoid experience

Biological Conservation, Journal Year: 2019, Volume and Issue: 241, P. 108356 - 108356

Published: Nov. 25, 2019

Language: Английский

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Low doses of the neonicotinoid insecticide imidacloprid induce ROS triggering neurological and metabolic impairments in Drosophila

Proceedings of the National Academy of Sciences, Journal Year: 2020, Volume and Issue: 117(41), P. 25840 - 25850

Published: Sept. 28, 2020

Declining insect population sizes are provoking grave concern around the world as insects play essential roles in food production and ecosystems. Environmental contamination by intense insecticide usage is consistently proposed a significant contributor, among other threats. Many studies have demonstrated impacts of low doses insecticides on behavior, but not elucidated links to insecticidal activity at molecular cellular levels. Here, histological, physiological, behavioral imidacloprid investigated Drosophila melanogaster, an experimental organism exposed field. We show that oxidative stress key factor mode action this doses. Imidacloprid produces enduring flux Ca2+ into neurons rapid increase levels reactive oxygen species (ROS) larval brain. It affects mitochondrial function, energy levels, lipid environment, transcriptomic profiles. Use RNAi induce ROS brain recapitulates insecticide-induced phenotypes metabolic tissues, indicating signal from responsible. Chronic level exposures adults lead dysfunction, severe damage glial cells, impaired vision. The potent antioxidant, N-acetylcysteine amide (NACA), reduces severity number imidacloprid-induced phenotypes, causal role for stress. Given known generate stress, research has wider implications. systemic impairment several biological functions, including vision, reported here would reduce resilience facing environmental challenges.

Language: Английский

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Interactions between pesticides and pathogen susceptibility in honey bees

Current Opinion in Insect Science, Journal Year: 2018, Volume and Issue: 26, P. 57 - 62

Published: Feb. 2, 2018

Language: Английский

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Pesticide residue survey of pollen loads collected by honeybees (Apis mellifera) in daily intervals at three agricultural sites in South Germany

PLoS ONE, Journal Year: 2018, Volume and Issue: 13(7), P. e0199995 - e0199995

Published: July 6, 2018

In agricultural landscapes honeybees and other pollinators are exposed to pesticides, often surveyed by residue analysis of bee bread. However, bread is a mixture pollen pellets different plants collected over longer time period. Therefore, pesticide content in the hive varies with plant species collection. Hence, an approximate approach gain information on detailed exposure during agronomic active season. As high-resolution data missing, we carried out survey five years (2012–2016) daily at three distinct sites southern Germany. 281 single day samples were selected subjected multi-pesticide analysis. Pesticide contaminations differed between sites. Intensive can be seen high concentrations as well amount pesticides detected. During observation 73 found, which 84% characterized non-harmful honeybees. To estimate risks for honeybees, hazard quotient (PHQ) was calculated. Even though detected sublethal concentrations, found substances not supposed honey bees, indicating necessity further improvement seed treatments increasing awareness flowering shrubs, field margins drift. Additionally, in-depth nine samples, divided into sub-fractions dominated species, revealed even higher crops some pesticides. We give precise 1,657 detections, should used realistic laboratory tests.

Language: Английский

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