Cytotoxic and genotoxic effects of a pendimethalin-based herbicide in Apis mellifera

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 280, С. 116565 - 116565

Опубликована: Июнь 13, 2024

Public concern about the effects of pesticides on non-target organisms has increased in recent years. Nevertheless, there is a limited number studies that address actual toxic herbicides insects. This study investigated side inhabiting agroecosystems and performing essential ecological economic functions such as crop pollination. We analysed morphological alterations gut, Malpighian tubules circulating haemocytes Apis mellifera workers markers exposure effects. A commercial formulation pendimethalin-based herbicide (PND) was administered orally under laboratory conditions at realistic concentration admitted field (330gL

Язык: Английский

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Bees travelling south: Climate‐induced range shifts and suitable habitat losses in south‐eastern neotropics

Journal of Biogeography, Год журнала: 2024, Номер 51(11), С. 2259 - 2273

Опубликована: Авг. 15, 2024

Abstract Aim To provide an assessment of climate change impacts on a set wild pollinators restricted to one the regions with greatest diversity bees in world. Also, we aimed test whether functional groups responded differently projections. Location South‐eastern South America (SES). Taxon Bees (Hymenoptera: Apidae sensu lato). Methods We selected 18 species mostly SES region, modelled their distributions and assessed possible near future (2050) richness shifts range centroids. Potential related different were evaluated through t ‐tests. Results was projected decrease northernmost increase southward. Most bee predicted shift centroids towards south‐west south, while suitable stable areas found southern Brazil. also higher proportional losses for eusocial compared solitary ones, generalists showed slightly lower gains than specialists. Main Conclusion are likely undergo changes future, at northern portions southward increases. The identified Brazil underscore importance conservation efforts particularly natural grasslands – endangered habitat high diversity. Although our results suggest vulnerability traditionally considered more resilient, it is essential acknowledge that other factors, including mutualists availability, behavioural particularities, phenology size, must be determinants ongoing change.

Язык: Английский

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Latitudinal gradient of thermal safety margin in an Australian damselfly: implications for population vulnerability

Royal Society Open Science, Год журнала: 2025, Номер 12(3)

Опубликована: Март 1, 2025

The thermal tolerance of species may be exceeded by the predicted temperature increases and thus contribute to extinction. However, impact is thought vary between climate regions across latitudes. Here, we aim establish vulnerability an ectothermic insect a warming estimating safety margin in Ischnura heterosticta damselflies. We measured critical maximum (CTmax) along latitudinal gradient 17° from 21 populations eastern coast Australia. Our results showed that damselflies inhabiting tropical had higher CTmax than temperate increased with increasing mean decreasing latitude. further found positive correlation damselfly parasite number temperature. Body size, body condition sex no on CTmax. projections will narrower tropics compared under 2.6°C annual (future projected - current) increase for years 2061-2080. Therefore, are likely more vulnerable change-driven extinction even though they have relatively Nevertheless, behaviour, adaptation plasticity might mitigate vulnerability.

Язык: Английский

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Unfavorable urban climatic conditions affects colony performance of an amazonian stingless bee (Apidae: Meliponini)

Insectes Sociaux, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Язык: Английский

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Effects of short-term heat stress on the thermal tolerance of western corn rootworm (Coleoptera: Chrysomelidae)

Journal of Insect Science, Год журнала: 2025, Номер 25(2)

Опубликована: Март 1, 2025

Abstract Insect responses to warming temperatures are determined partly by their physiology, which is influenced genetic factors and plasticity induced past temperature exposure. The effect that prior high exposure has on insect thermal tolerance complex depends the degree of heat stress experienced; may allow for individuals tolerate higher through hardening or reduce an individual’s capacity withstand accumulated stress. In this study, we assessed how short exposures a laboratory colony’s geographical origin affected critical maximum (CTmax) western corn rootworm (Diabrotica virgifera LeConte), economically important pest. Despite wide latitudinal range source populations, colonies did not differ in CTmax. Regardless colony origin, found exposing resulted lower CTmax, suggests accumulated. This study highlights experiences at near they experience field, have currently unknown implications its behavior.

Язык: Английский

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Environmental drivers of wild bee reproductive performance across a South American dryland ecoregion

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2025, Номер 292(2045)

Опубликована: Апрель 1, 2025

The reproductive performance of wild bees is a key determinant their population persistence. However, few studies have directly examined the environmental drivers demographic processes using geographically broad approach. In this study, we explored how biotic and abiotic factors influence reproduction solitary, cavity-nesting across Monte Desert ecoregion in Argentina. Using artificial nests standardized sampling spanning 2000 km 20° latitude, related metrics—nest establishment, offspring production survival—to climate (flower abundance, vegetation cover brood parasitism). Climate was strongest predictor bee performance: warm, humid conditions during nesting period were associated with reduced nest establishment survival. Brood parasitism further Across Desert’s latitudinal gradient, peaked at mid-latitudes, while survival increased towards higher latitudes. These general patterns matched those M. leucografa, most abundant species. findings highlight sensitivity to climatic conditions, particularly period. Our study advances our understanding potential impacts change on Neotropical bees, where extensive areas are experiencing dramatic land-use changes.

Язык: Английский

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Warmer temperatures reinforce negative land-use impacts on bees, but not on higher insect trophic levels

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2025, Номер 292(2046)

Опубликована: Май 1, 2025

Climate and land-use change are major drivers of insect decline, yet their interactive effects on richness abundance, especially across trophic levels, remain poorly understood. Here, we investigate how temperature land use shape communities spatial scales from flowering plants cavity-nesting bees to hunting wasps, antagonists parasitism rates. Using trap nests a space-for-time approach, surveyed 179 plots spanning four habitat types (forest, grassland, arable settlements) 60 study regions in Germany covering semi-natural, agricultural urban landscapes. Bee abundance responded climate–land-use interactions scales, being higher with warmer local daytime temperatures overall climates, but only less intensive uses. In contrast, elevated night-time negatively affected bees. Higher levels benefited more consistently climates than lower were by high temperatures. Parasitism rates lowest similar habitats within semi-natural regions, suggesting that landscape-scale processes buffer effects. Our findings underscore the importance considering for diurnal insects suggest rising may exacerbate negative impacts pollinators.

Язык: Английский

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Influence of a local bioclimatic gradient on wild bees in boreal forest clearcuts

The Canadian Entomologist, Год журнала: 2025, Номер 157

Опубликована: Янв. 1, 2025

Abstract Variation in wild bee assemblages along climatic gradients is still poorly known, particularly eastern Canada. In this study, we assessed communities forest stands that were recently clearcut a latitudinal bioclimatic gradient. The analyses conducted at two taxonomic levels: first the genus level for bees as whole (Anthophila) and then species bumble ( Bombus spp. Latreille) (Hymenoptera: Apidae). Coloured pan traps used to catch point-intercept method was survey floristic composition each site. Abundance richness of Anthophila genera abundance inversely related latitude, but not, being instead associated with sections These results indicate relationship between diversity latitude varies among taxa climate resources probably play role. terricola , concern Canada, found relatively high numbers throughout study area. To our knowledge, provides assessment clearcuts province Quebec, showing clear differentiation spatial

Язык: Английский

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Effects of heat shocks, heat waves, and sustained warming on solitary bees

Frontiers in Bee Science, Год журнала: 2024, Номер 2

Опубликована: Июль 3, 2024

Along with higher average temperatures, global climate change is expected to lead more frequent and intense extreme heat events, these different types of warming are likely differ in their effects on bees. Although solitary bees comprise >75% bee species, despite ecological economic value as pollinators, a literature search revealed that only 8% studies responses involve Here we review have addressed how affected by three main vary magnitude duration: shocks, waves, sustained warming. We focus direct physiological behavioral bees, rather than the underlying mechanisms. find shocks received little attention both terms number relative social all those examine single genus, Megachile . This work has shown heat-shocked eggs, larvae, pupae tend upregulate shock protein genes, while at adult stage can increase mortality male potentially altering population sex ratios. waves even less study, but few suggest events larval slow development time, may not be able physiologically acclimate wave conditions increasing critical thermal maxima. Finally, warming, which been relatively well-studied speed rate, reduce body mass, mortality, alter foraging behavior. Our reveals knowledge gaps and, broadly, unmanaged To improve our ability anticipate consequences for encourage research examines short-term, incorporates greater realism complexity.

Язык: Английский

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Thermal tolerance and sociality explain the interactive role of bees in a pollination network

Oikos, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 18, 2024

Numerous studies have explored the organization of pollination networks and factors influencing these interactions at various spatial temporal scales. Within networks, species vary in their significance influence on one another (i.e. interactive roles), understanding which determine this enables us to better comprehend interconnected relationships that drive resilience diversity ecosystems. Nevertheless, despite ectothermic nature bees potential impact social behaviour bee foraging patterns plants, amount theoretical empirical information available regarding how thermal tolerance limits sociality affect roles within remains relatively scarce. In study, we assess physiological (thermal tolerance) traits shape role a network coastal environment Gulf Mexico, Mexico. For sociality, classified as eusocial, subsocial, solitary while for tolerance, used both warmest critical maximum, CT max ) coldest minimum, m temperature. general, found bees' explain studied. Specifically, eusocial had greater than subsocial bees. Moreover, observed with lower ax higher less heat cold tolerant) role. Our findings suggest inherent life history are valuable predicting may implications ecological, functional evolutionary processes ecosystems, including impacts resulting from climate change.

Язык: Английский

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