Heat and desiccation tolerances predict bee abundance under climate change

Nature, Journal Year: 2024, Volume and Issue: 628(8007), P. 342 - 348

Published: March 27, 2024

Language: Английский

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Six years of wild bee monitoring shows changes in biodiversity within and across years and declines in abundance

Ecology and Evolution, Journal Year: 2022, Volume and Issue: 12(8)

Published: Aug. 1, 2022

Wild bees form diverse communities that pollinate plants in both native and agricultural ecosystems making them ecologically economically important. The growing evidence of bee declines has sparked increased interest monitoring community population dynamics using standardized methods. Here, we studied the biodiversity within across years by wild adjacent to four apple orchard locations Southern Pennsylvania, USA. We collected passive Blue Vane traps continuously from April October for 6 (2014-2019) amassing over 26,000 representing 144 species. quantified total abundance, richness, diversity, composition, phylogenetic structure. There were large seasonal changes all measures with month explaining an average 72% variation our models. Changes time less dramatic 44% metrics. found especially last 3 years, though additional sampling are needed say if part a larger trend. Analyses 40 most abundant species indicate about one third showed at least some abundance. Bee family explained species-level patterns but no consistent family-level declines, bumble sweat groups declined most. Overall, results show season-wide multiple can reveal nuanced biodiversity, phenological bees, trends many co-occurring These datasets could be used quantify relative effects different aspects environmental change have on help identify conservation concern.

Language: Английский

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Overwintering strategy regulates phenological sensitivity and consequences for ecological services in a clade of temperate North American insects

Functional Ecology, Journal Year: 2024, Volume and Issue: 38(5), P. 1075 - 1088

Published: March 13, 2024

Abstract Recent reports of insect declines have raised concerns about the potential for concomitant losses to ecosystem processes. However, understanding causes and consequences is challenging, especially given data deficiencies most species. Needed are approaches that can help quantify magnitude at levels above Here we present an analytical framework assessing broad‐scale plant–insect phenologies their relationship community‐level abundance patterns. We intentionally apply a species‐neutral approach analyse trends in phenology macroecological scale. Because both critical processes, estimate aggregate metrics using overwintering (diapause) stage, key species trait regulating environmental sensitivities. This be used across broad spatiotemporal scales multiple taxa, including less well‐studied groups. Using community (‘citizen’) science butterfly observations from platforms Eastern USA, show relationships between drivers, depend on diapause stage. In particular, egg‐diapausing butterflies marked changes adult‐onset relation plant rapidly declining over 20‐year span study region. Our results also demonstrate negative warmer winters butterflies, irrespective phenology. sum, stage strongly shapes phenological sensitivities developmental requirements seasons, providing basis predicting impacts change trophic levels. Utilizing ties thermal performance life stages climate lower‐trophic‐level provides step towards processes provided by other herbivorous insects into future. Read free Plain Language Summary this article Journal blog.

Language: Английский

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Life-history traits predict responses of wild bees to climate variation

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 289(1973)

Published: April 20, 2022

Life-history traits, which are physical traits or behaviours that affect growth, survivorship and reproduction, could play an important role in how well organisms respond to environmental change. By looking for trait-based responses within groups, we can gain a mechanistic understanding of why change might favour penalize certain species over others. We monitored the abundance at least 154 bee 8 consecutive years subalpine region Rocky Mountains ask whether bees differently changes abiotic conditions based on their life-history traits. found comb-building cavity nesters larger bodied declined relative with increasing temperatures, while smaller, soil-nesting increased. Further, narrower diet breadths increased decreased rainfall. Finally, reduced snowpack was associated overwintered as prepupae whereas adults abundance, suggesting overwintering body size, lipid content survival. Taken together, our results show climate may reshape pollinator communities, others declining, potentially leading novel plant–pollinator interactions plant reproduction.

Language: Английский

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Unveiling of climate change-driven decline of suitable habitat for Himalayan bumblebees

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

Published: Feb. 29, 2024

Abstract Insect pollinators, especially bumblebees are rapidly declining from their natural habitat in the mountain and temperate regions of world due to climate change other anthropogenic activities. We still lack reliable information about current future conditions Himalaya. In this study, we used maximum entropy algorithm for SDM look at (in 2050 2070) suitable habitats found that Himalayan range do not have a very promising as most species will decrease over next 50 years. By 2050, less than 10% area remain 72% species, by 2070 number be raised 75%. During time period, existing declined but some find new which clearly indicates possibility shift bumblebees. Overall, 15% region is currently highly bumblebees, should considered priority areas conservation these pollinators. Since lie between several countries, nations share international borders agreements comprehensive pollinator diversity protect indispensable ecosystem service providers.

Language: Английский

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What are the main reasons for the worldwide decline in pollinator populations?

CABI Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: May 15, 2024

Abstract Pollinator populations are declining worldwide and over 87% of flowering plant species 87 the leading global food crops rely on pollinators for seed production. decline seriously impacts biodiversity conservation, reduces crop yield, threatens security. Understanding drivers pollinator can guide development strategies action plans to protect conserve essential ecosystem services they provide. This review introduces diversity pollinators, addresses main decline, presents reduce their negative impacts. We discuss how managed bees negatively affect wild bee species, examine habitat loss, pesticide use, pests pathogens, pollution, climate change decline. Connections between humans addressed. Climate emerges as most prominent threat difficult control. The changes in water temperature associated with lower quantity quality resources available decrease survival larvae or adults, modify suitable habitats. is a issue serious security, world stability. Efforts control various factors that impact must continue given dire consequences.

Language: Английский

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Risk assessment requires several bee species to address species-specific sensitivity to insecticides at field-realistic concentrations

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Dec. 18, 2023

Abstract In the European registration process, pesticides are currently mainly tested on honey bee. Since sensitivity data for other bee species lacking majority of xenobiotics, it is unclear if and to which extent this model can adequately serve as surrogate all wild bees. Here, we investigated effects field-realistic contact exposure a pyrethroid insecticide, containing lambda-cyhalothrin, seven ( Andrena vaga , Bombus terrestris Colletes cunicularius Osmia bicornis cornuta, Megachile rotundata, Apis mellifera ) with different life history characteristics in series laboratory trials over two years. Our results showed significant species-specific responses pesticide at application rate (i.e., 7.5 g a.s./ha). Species did not group into distinct classes high low mortality. Bumble mason survival was least affected by M. rotundata most individuals dead 48 h after application. medium mortality compared species. Most sublethal effects, i.e. behavioral abnormalities, were observed within first hours some solitary species, example O. A. vaga, higher percentage performed abnormal behavior longer until end observation period. While individual weight explained patterns, differences likely linked additional ecological, phylogenetic or toxicogenomic parameters well. support idea that be substitute species’ may justify usage safety factors. To cover more sensitive larger set should considered risk assessment.

Language: Английский

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Population structure varies among 4 western North American bumble bee species

Insect Systematics and Diversity, Journal Year: 2025, Volume and Issue: 9(1)

Published: Jan. 1, 2025

Abstract Bumble bees (Hymenoptera: Apidae, Bombus Latreille, 1802) are critical pollinators—providing the necessary ecological services for food and crop production. In western North America, species-rich bumble bee communities inhabit mountain ranges. However, as climate change increases temperatures, montane populations restricted to higher elevations, their ability disperse maintain genetic diversity decreases suitable habitat connecting decreases. This isolation could lead extirpation of local pollinator a loss species. We analyzed 4 broadly sympatric species with differing elevational niches—Bombus flavifrons, B. melanopygus, mixtus, sylvicola—across Rocky Cascade Mountains America assess range-wide population structure. used microsatellite markers differentiation among (FST) performed Bayesian clustering analyses identify groups within each study Further, we investigated if observed was better explained by distance (IBD) or resistance (IBR) incorporating suitability models (HSMs) into structure analyses. Although expected more narrow niche requirements, found evidence this all species, experiencing significant relative inland populations. Additionally, IBR predicted than IBD flavifrons mixtus. Our results suggest that considering connectivity across geographic range is important understanding structures.

Language: Английский

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Climate influences broadly, landscape influences narrowly: Implications for agricultural beneficial insects

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 973, P. 179150 - 179150

Published: March 19, 2025

Language: 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, Journal Year: 2025, Volume and Issue: 292(2045)

Published: April 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.

Language: Английский

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