To understand the plight of insects, entomologists look to the past

McDermott, Amy

doi:10.1073/pnas.2018499117

Cited by 11 publications

(12 citation statements)

References 14 publications

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“…From the previous two centuries, insect decline has started rapidly [10]. The old recorded decline of Rocky Mountain Locust during 1902 [20] in USA and recently the scientists from the University of Helsinki warned humanity about worldwide insect decline with unpredictable consequences [21].…”

Section: Background Of Insect Declinementioning

confidence: 99%

“…A meta-analysis data concerned to terrestrial insects published in Journal Science in 2020 reported a global insect population decline by 9% per decade [9,10] in contrast to fresh water insects whose population is enhancing very fast at 11% per decade [11,12]. Terrestrial insects are more vulnerable to diverse threats [1] and some of the most affected insect groups namely bees, butterflies, moths, beetles, dragon flies and damselflies [13].…”

Section: Introductionmentioning

confidence: 99%

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Causes and Reasons of Insect Decline and the Way Forward

Dar¹,

Ansari²,

Naggar³

et al. 2022

Global Decline of Insects

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There are lot of reasons and causes of insect decline. The main causes of insect decline is attributed to habitat destruction, land use changes, deforestation, intensive agriculture, urbanization, pollution, climate change, introduction of invasive insect species, application of pesticides, mass trapping of insects using pheromones and light traps, pathological problems on various insects, and introduction of exotic honey bees in new areas that compete with the native bees for resource portioning and other management techniques for pest management, and even not leaving any pest residue for predators and parasitoids for their survival. The use of chemical insecticides against target or non-target organisms is major cause for insect decline. The diseases and decline of the important pollinators is still a mistry for colony collapse disorder. To overcome the cause of insect decline, various conservation techniques to be adopted and augmentation of artificial nesting and feeding structures, use of green pesticides, maintaining the proper pest defender ratio (P:D), policies and reaching to political audience at global level and other factors already discussed in the chapter may be helpful for mitigating the insect decline and especially for the pollinators, a key insect for life.

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Section: Background Of Insect Declinementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Causes and Reasons of Insect Decline and the Way Forward

Dar¹,

Ansari²,

Naggar³

et al. 2022

Global Decline of Insects

View full text Add to dashboard Cite

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“…Asterisks indicate statistica significance (p < 0.05), with exact p values given in panels e-g. e-g) Same data as in d) but separated by the year in which the queen was reared (i.e., a 2018 queen was 2 years old). 1 These queens were chosen from a previously published dataset 36,38 because failed and healthy queens were included in the same shipment, eliminating potential extraneous variables associated with shipping. Queen honey bees are susceptible to pathogenic infections 26,[39][40][41] , and most commonly infected with sacbrood virus (SBV), black queen cell virus (BQCV), and deformed-wing virus (DWV) 36,39 .…”

Section: Failed Queens Have Smaller Ovaries and Reduced Sperm Viabilitymentioning

confidence: 99%

“…Amidst a backdrop of widespread insect declines [1][2][3][4][5][6] and fluctuating populations 7,8 , it is vitally important to better understand the impacts of interacting biotic and abiotic stressors on insect physiology 9 . Pesticide exposure and climate change are often cited as drivers of insect decline [9][10][11][12][13] , but biotic drivers, such as viruses, are comparatively understudied, despite some viruses exhibiting broad host ranges with the potential for widespread impacts across species.…”

Section: Introductionmentioning

confidence: 99%

Fertility costs of cryptic viral infections in a model social insect

Chapman

Amiri

Han

et al. 2021

Preprint

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Declining global insect populations emphasize the importance of understanding the drivers underlying reductions in insect fitness. Many insects are subject to a trade-off between reproduction and immune activity, meaning that infections can have indirect impacts on fecundity, even in the absence of overt symptoms. While eusocial insects have escaped a broader trade-off between reproduction and lifespan, our results suggest that honey bees, a model Hymenopteran, are susceptible to reproduction-immunity compromises. We report that natural viral infection is associated with decreased ovary mass and upregulation of heat-shock proteins (HSPs) which are part of the honey bee's antiviral response. Failed (poor quality) queens sampled from a wide geographic range have higher levels of viral infection, smaller ovaries, and altered ovarian protein composition, with over 20% of proteins differentially expressed. Significantly reduced levels of the yolk-protein precursor vitellogenin in the ovaries indicate a direct decline in fertility. We experimentally infected queens with Israeli acute paralysis virus and, as expected, infected queens exhibited significantly lower vitellogenin expression and higher HSP expression, confirming a causal relationship between viral infection and genes involved in fertility and immunity. The link between ovary size and queen failure could not be explained by other abiotic stressors. These findings suggest that viral infections occurring naturally in the field are compromising reproductive success, even among social insects.

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“…2006). In recent years, invertebrates, and especially arthropods, have been at the centre of a debate (Dornelas & Daskalova 2020; McDermott 2021) regarding the magnitude and even the directionality of the temporal trends in their abundance. Some studies showed a strong decline on the basis of standardized inventories (Hallmann et al .…”

Section: Introductionmentioning

confidence: 99%

Controversy over the decline of arthropods: a matter of temporal baseline?

Duchenne

Mihoub

Loïs

et al. 2022

Preprint

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Recently, a number of studies have reported somewhat contradictory patterns of temporal trends in arthropod abundance, from decline to increase. Arthropods often exhibit non-monotonous abundance variations over time, making it important to account for temporal coverage in interpretation of abundance trends, which is often overlooked in statistical analysis. Combining four recently analysed datasets that led to contrasting outcomes, we first show that temporal abundance variations of arthropods are non-monotonous. Using simulations, we show non-monotony is likely to bias estimated linear abundance trends. Finally, analysing empirical data, we show that heterogeneity in estimated abundance trends is significantly related to the variation in temporal baseline of analysed time series. Once differences in baseline years, habitats and continents are accounted for, we do not find any statistical difference in estimated linear abundance trends among the four datasets. We also show that short time series produce more stochastic abundance trends than long series, making the dearth of old and long-term time series a strong limitation in the assessment of temporal trends in arthropod abundance. The lack of time series with a baseline year anterior to global change acceleration is likely to lead to an underestimation of global change effects on biodiversity.

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To understand the plight of insects, entomologists look to the past

Cited by 11 publications

References 14 publications

Causes and Reasons of Insect Decline and the Way Forward

Causes and Reasons of Insect Decline and the Way Forward

Fertility costs of cryptic viral infections in a model social insect

Controversy over the decline of arthropods: a matter of temporal baseline?

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