Ecological and social factors influence interspecific pathogens occurrence among bees

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: March 1, 2024

The interspecific transmission of pathogens can occur frequently in the environment. Among wild bees, main spillover cases are caused by associated with Apis mellifera, whose colonies act as reservoirs. Due to limited availability data Italy, it is challenging accurately assess impact and implications this phenomenon on bee populations. In study, a total 3372 bees were sampled from 11 Italian regions within BeeNet project, evaluating prevalence abundance major honey (DWV, BQCV, ABPV, CBPV, KBV, Nosema ceranae, Ascosphaera apis, Crithidia mellificae, Lotmaria passim, bombi). 68.4% samples positive for at least one pathogen. DWV, N. ceranae CBPV showed highest values, confirming them most prevalent spread For these pathogens, Andrena, Bombus, Eucera Seladonia mean values. Generally, time trends decrease April July. order predict risk infection among statistical models developed. A low influence apiary density pathogen occurrence was observed, while meteorological conditions agricultural management greater persistence Social biological traits also contributed defining higher bivoltine, communal, mining oligolectic bees. Out all tested, 40.5% co-infected two or more pathogens. some cases, individuals simultaneously infected up five different It essential increase knowledge about understand dynamics, effects pollinator Implementing concrete plans conservation species important ensure health human-managed One-Health perspective.

Language: Английский

---

Occurrence of Honey Bee (Apis mellifera L.) Pathogens in Wild Pollinators in Northern Italy

Frontiers in Cellular and Infection Microbiology, Journal Year: 2022, Volume and Issue: 12

Published: June 30, 2022

Diseases contribute to the decline of pollinator populations, which may be aggravated by interspecific transmission honey bee pests and pathogens. Flowers increase risk transmission, as they expose pollinators infections during foraging activity. In this study, both prevalence abundance 21 pathogens (11 viruses, 4 bacteria, 3 fungi, trypanosomatids) were assessed in flower-visiting entomofauna sampled from March September 2021 seven sites two North-Italian regions, Emilia-Romagna Piedmont. A total 1,028 specimens collected, identified, analysed. Of twenty-one that searched for, only thirteen detected. Altogether, positive individuals reached 63.9%, with

Language: Английский

---

Bees in the city: Findings from a scoping review and recommendations for urban planning

AMBIO, Journal Year: 2024, Volume and Issue: unknown

Published: May 20, 2024

Over the last decades, bee biodiversity has dropped sharply due to land use change, including urbanization. To contrast this, recent research pointed cities as a hotspot for bees. Because of this ambiguity, scoping review been conducted examine urban characteristics that impact bees and how are impacted. A total 276 articles were analyzed against landscape local habitat characteristics. The key findings include first natural areas more valuable since levels higher. Second, generally score better than agricultural rural areas. Third, plant positively influences biodiversity. Fourth, environment strongly affects some traits proportion native For making friendly inclusive, we recommend maintain areas, connect ecosystems, encourage floral abundance diversity increasing size green overall.

Language: Английский

---

Direct and indirect effects of land use on microbiomes of trap-nesting solitary bee larvae and nests

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 8, 2025

The global decline in biodiversity and insect populations highlights the urgent need to conserve ecosystem functions, such as plant pollination by solitary bees. Human activities, particularly agricultural intensification, pose significant threats these essential services. Changes land use alter resource nest site availability, pesticide exposure other factors impacting richness, diversity, health of bee species. In this study, we investigated yet another facet currently less well context: Microbial communities associated with wild bees play crucial roles larval development, metabolism, immunity overall health. However, drivers dynamics healthy microbiome are still poorly understood, especially regarding direct indirect effects on diversity composition microbial communities. We examined bacterial offspring materials Megachilid trap-nesting bee, Osmia bicornis, along a gradient intensification 16S rRNA gene metabarcoding. Given that landscape composition, climatic conditions, food resources known influence compositions species, hypothesized changes would available for material collection thereby affecting microbiomes their environments. anticipated reduced altered increased which is decrease number resources, including pool floral soil bacteria surrounding environment. As expected, observed shifts nests across varying degrees intensity, differing management types availability flowers. Shannon (larval pollen provision, enclosure) guts decreased increasing intensity. pupae remained unaffected, indicating reorganization during metamorphosis, not significantly influenced resources. Our findings provide new insights into shaping environmental transmission microbiomes. This understanding comprehending impacts intensive developing strategies mitigate effects.

Language: Английский

---

Competition for resources: What factors lead honey bees to outcompete other insect competitors?

Acta Oecologica, Journal Year: 2025, Volume and Issue: 127, P. 104077 - 104077

Published: April 14, 2025

Language: Английский

---

Distribution of infectious and parasitic agents among three sentinel bee species across European agricultural landscapes

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Feb. 12, 2024

Abstract Infectious and parasitic agents (IPAs) their associated diseases are major environmental stressors that jeopardize bee health, both alone in interaction with other stressors. Their impact on pollinator communities can be assessed by studying multiple sentinel species. Here, we analysed the field exposure of three managed species ( Apis mellifera , Bombus terrestris Osmia bicornis ) to 11 IPAs (six RNA viruses, two bacteria, microsporidia). The bees were deployed at 128 sites eight European countries adjacent either oilseed rape fields or apple orchards during crop bloom. Adult each sampled before placement after detected quantified using a harmonised, high-throughput semi-automatized qPCR workflow. We describe differences among IPA profiles (richness, diversity, detection frequencies, loads change upon exposure, risk), no clear patterns related country focal crop. Our results suggest most frequent adult more appropriate for assessing bees’ risk. also report positive correlations supporting potential transmission sentinels, suggesting careful consideration should taken when introducing pollinators ecologically sensitive environments.

Language: Английский

---

Limited evidence for genetic differentiation or adaptation in two amphibian species across replicated rural–urban gradients

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(6)

Published: June 1, 2024

Abstract Urbanization leads to complex environmental changes and poses multiple challenges organisms. Amphibians are highly susceptible the effects of urbanization, with land use conversion, habitat destruction, degradation ranked as most significant threats. Consequently, amphibians declining in urban areas, both population numbers abundance, however, effect urbanization on genetic parameters remains unclear. Here, we studied genomic response two widespread European species, common toad Bufo bufo (26 localities, 480 individuals), smooth newt Lissotriton vulgaris (30 516 individuals) three geographic regions: southern northern Poland Norway. We assessed genome‐wide SNP variation using RADseq (ca. 42 552 thousand SNPs toads newts, respectively) adaptively relevant major histocompatibility (MHC) class I II genes. The results linked differentiation marker types regional (latitudinal) effects, which also correspond historical biogeography. Further, did not find any association between level at local scales for either species. However, but toads, have lower levels within‐population diversity, suggesting higher susceptibility negative urbanization. A decreasing diversity increasing was found MHC while relationship differed regions. populations. Although environment analyses data, LFMM BayPass, revealed numerous (219 B. 7040 L. ) statistically associated a marked lack repeatability regions, multifaceted natural selection elicited by life city.

Language: Английский

---

Multihost Pathogen Transmission in Wild Bee Communities

Published: Jan. 1, 2025

Language: Английский

---

Bee Microbiomes: Unveiling Diversity and Social Dynamics in Managed and Wild Bees

Published: Jan. 1, 2025

Language: Английский

---

Urban Green Areas: Examining Honeybee Pathogen Spillover in Wild Bees Through Shared Foraging Niches

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(6), P. 2879 - 2879

Published: March 7, 2025

In urbanized environments, the expansion of urban areas has led to creation fragmented green spaces such as gardens and parks. While these provide essential habitats for pollinators, they may also inadvertently concentrate specimens different species, increasing opportunities pathogen transmission. This study highlights importance investigating dynamics in ecosystems, focusing on managed Apis mellifera Linnaeus, 1758, their wild counterparts. Over a two-year monitoring period Milan, Italy, we examined interactions between pollinator populations spillover honeybee pathogens. Our findings confirm widespread RNA virus transmission honeybees supporting previous studies. Notably, Acute Bee Paralysis Virus (ABPV) exhibited highest prevalence across both sampling years, underscoring its significant role dynamics. These results emphasize need regular research mitigate risks communities inform conservation strategies.

Language: Английский

---