Climatic stability and species turnover as potential drivers of latitudinal diversity gradients in Chilean wild bees DOI Open Access
Mónica Núñez‐Flores, Andrés Solórzano, Víctor H. Monzón

et al.

Insect Conservation and Diversity, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 22, 2024

Abstract This study explores the latitudinal diversity gradient (LDG) of wild bees (Hymenoptera: Anthophila) in Chile, a region with diverse climates and geographic isolation. By examining species richness patterns, this research seeks to uncover key factors influencing these patterns Chilean bees. We compiled analysed occurrence records bee from five families, evaluating across gradients. To explain LDG, we tested hypotheses such as Rapoport's effect, mid‐domain effect (MDE), source‐sink dynamics, Climatic Variability Hypothesis. Additionally, conducted cluster analyses beta assessments identify distinct ecoregions understand turnover nestedness along Our analysis revealed mid‐latitudinal peak around 34° S, consistent global bimodal for The data did not support MDE predictions, implying that geometric constraints alone cannot patterns. Instead, positive correlation between extent latitude supports indicating broader environmental tolerances at higher latitudes. Beta showed turnover, nestedness, drives variation gradients, reflecting significant replacement latitudes due changing conditions. Cluster identified groups corresponding Northern, Central, Southern Chile ecoregions, reinforcing substantial shifts composition bands. findings emphasise importance stable supporting high Understanding is vital predicting biodiversity responses climate change guiding conservation strategies, especially Chile's hotspots endemism.

Language: Английский

Lack of thermal acclimation in multiple indices of climate vulnerability in bumblebees DOI

Colton Leroy Poore,

Erika J. Ibarra‐Garibay,

Amy L. Toth

et al.

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 292(2038)

Published: Jan. 1, 2025

Indices of climate vulnerability are used to predict species’ change based on intrinsic physiological traits, such as thermal tolerance, sensitivity and acclimation, but rarely is the consistency among indices evaluated simultaneously. We compared physiology queen bumblebees between a species experiencing local declines ( Bombus auricomus ) exhibiting continent-wide increases B. impatiens ). conducted multi-week acclimation experiment under simulated warming measure critical maximum (CT max ), minimum min metabolic rate water loss in each these traits. also measured survival throughout after tolerance trials. Neither acclimated temperature treatments by adjusting any trait. found conflicting patterns within species. that individuals with highest CT exhibited lowest following trial. Our study highlights inconsistent across multiple species, indicating studies measuring only one index may be limited their ability inform responses environmental change.

Language: Английский

Citations

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Increased overwintering temperature reduces reproductive success of the solitary bee species Osmia bicornis DOI Creative Commons
Sarah Marie Müller, Jana Collatz, Henning Richter

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 23, 2025

Solitary wild bees play a key role as pollinators of plants and crops, but they are increasingly at risk from anthropogenic global change, such climate warming. However, how warmer temperature during overwintering affects reproductive success those remains largely unknown. In semi-field experiment we assessed individual life-long 144 females the solitary bee species Osmia bicornis that had been wintered three different temperatures. Overwintering mortality was on average 32% higher winter temperatures 8 °C compared to 4.5 °C–0 °C, which almost all successfully emerged. After wintering produced less offspring than after 0 (26% or 36% offspring, respectively). Although longevity daily production rate were not significantly affected, nesting duration tended be longer (+ 2.5 days) likely contributed colder Mortality sex ratio affected. While future studies should also consider climatic variation winter, these findings indicate increasing mean could threaten O. potentially other populations.

Language: Английский

Citations

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Vulnerability of Global Afforestation Projects to a Polyphagous Invasive Fall Webworm DOI Creative Commons
Lilin Zhao, Jing Ning, Jingjing Du

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Global plantations, crucial for restoring degraded landscapes, face rising invasive pest threats, in recent decades. This study highlights that the invasion and proliferation of fall webworm have been facilitated by global afforestation boom last 80 years could pose a threat to all ecological projects until 2050. Since 1940, this polyphagous has spread 40 countries, following an S-curve pattern. The distribution is positively correlated with expansion rates host tree plantation areas. China now most affected country webworm, highest comprehensive index (CTI). number species risen from 121 U.S. 400 China, range expanded hardwoods include coniferous trees. Notably, two-thirds total 600 plants are utilized purposes. preferred species, Acer, Quercus, Populus, predominant eight major projects. Additionally, hydroclimate extremes projected increase threats 65.8% zones 2070, highlighting need strategic selection achieve sustainable goals projects, protect against pests.

Language: Английский

Citations

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Extreme heat affects blueberry pollen nutrition, bee health, and plant reproduction DOI Creative Commons
Jenna Walters, Robin Fisher, Thomas D. Sharkey

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 20, 2025

Extreme heat events are increasingly common, and if these align with pollen development, they can alter nutrient composition. However, no studies have examined how the timing of relative to bud development affects role in plant pollination bee health. To explore this, we exposed highbush blueberry plants extreme (37.5 °C) or normal (25 conditions for 4 h across several floral stages. Pollen was analyzed protein, carbohydrate, amino acid content. We found that buds vary their sensitivity heat, swell being most heat-sensitive developmental stage significant reductions total individual acids. When from same fed Osmia lignaria larvae, individuals heat-stressed were 7 times more likely die compared those non-stressed pollen. Blueberry flowers used a hand study, where observed 39% reduction fruit set following stress at swell. This study reveals disrupt both survival through changes nutritional

Language: Английский

Citations

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Poor air quality raises mortality in honey bees, a concern for all pollinators DOI Creative Commons
Nico Coallier, Liliana Pérez, Maxime Fraser Franco

et al.

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: Feb. 21, 2025

Language: Английский

Citations

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Bacterial diversity in the honey sac during bee foraging on winter-flowering flora and dominant Bacillus subtilis inhibits Hafnia alvei DOI Creative Commons
Miao Wang,

Wenzheng Zhao,

Danyin Zhou

et al.

Frontiers in Insect Science, Journal Year: 2025, Volume and Issue: 5

Published: March 11, 2025

Background The bacterial diversity of two bee species in the process honey collection during flowering season three different floral sources winter was studied. common bacterium all samples Bacillus subtilis . Methods In present study, we collected nectar, sacs, and fresh Agastache rugosa , Prunus cerasoides Brassica rapa pure culture method used to count analyze number bacteria, they were identified using 16S rRNA sequencing, similarities compared NCBI, dominant B. phylogenetic analysis intersection determined conduct further bacteriostatic experiments. Results results showed that most abundant quantity bacteria could be found nectar or honey. At same time, highest abundance sacs A. cerana when on while mellifera A total 33 isolated, with variations their distribution across sample types sources. inhibitory effect 10 -1 -10 -5 Hafnia alvei by very significant. Conclusions sources, indicating potential importance as a probiotic gut for production, promote disease resistance health honeybees winter.

Language: Английский

Citations

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Flowers that cool themselves: Thermal ecology of summer‐blooming thistles in hot Mediterranean environments DOI
Carlos M. Herrera

Ecological Monographs, Journal Year: 2025, Volume and Issue: 95(1)

Published: Feb. 1, 2025

Abstract Flower exposure to high temperature reduces the production, viability, and performance of pollen, ovules, seeds, which in turn impairs individual fecundity risks survival populations. Autonomous floral cooling could alleviate effects flower harmful temperatures, yet investigations on thermal ecology flowers hot environments are needed evaluate reality, magnitude, ecological significance thermoregulatory cooling. This paper reports a study heads (=capitula) 15 species summer‐blooming Asteraceae, tribe Cardueae, from hot‐dry habitats southern Iberian Peninsula. Temperature inside ( T ) outside out capitula were assessed under natural field conditions using two complementary sampling measurement procedures, provided information relationships between temperatures at levels (“continuous recording”) local plant populations (“instantaneous measurements”). Baselines for – relationship absence physiological activity obtained by exposing dehydrated variable ambient field. To assess whether co‐flowering Asteraceae defined collectively distinct layer, vertical distribution relative ground was quantified. Bees visiting watched air beside visited capitulum measured. Results remarkably similar all species. The experienced during long periods, their interior cooler than most time, with differentials (Δ = − often approaching, sometimes exceeding −10°C. best described composite one steep shallow linear separated breakpoint (Ψ, interspecific range 25–35°C). Capitula only weakly thermoregulated when < Ψ, but switched closely > Ψ. Narrow distributions above responses resulted “refrigerated layer” where bees foraged Ψ presumably cooled capitula. Thermoregulatory refrigeration (“thermal engineering”) can benefit not reproduction reducing pollen ovule summer also bee pollinators other floricolous insects.

Language: Английский

Citations

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Optimal operational and carbon neutrality strategies for private hospitals: A multi-objective approach considering patient flow DOI
Haoran Li, Yiwei Wu, Baogui Xin

et al.

Transportation Research Part E Logistics and Transportation Review, Journal Year: 2025, Volume and Issue: 198, P. 104107 - 104107

Published: April 8, 2025

Language: Английский

Citations

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RNA metagenomics revealed insights into the viromes of honey bees (Apis mellifera) and Varroa mites (Varroa destructor) in Taiwan DOI

Fang-Min Chang,

Yijun Chen, Pei-Shou Hsu

et al.

Journal of Invertebrate Pathology, Journal Year: 2025, Volume and Issue: unknown, P. 108341 - 108341

Published: April 1, 2025

Language: Английский

Citations

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Contrasting effects of climate and anthropogenic change on future invasion risk of a solitary bee Amegilla pulchra DOI Creative Commons

Nicolas Dubos,

Benoît Geslin, Hervé Jourdan

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 385, P. 125711 - 125711

Published: May 10, 2025

Language: Английский

Citations

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