Wild Bees

López‐Uribe, Margarita M.

doi:10.1002/9781119583417.ch7

Cited by 6 publications

(2 citation statements)

References 72 publications

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“…However, little is known about long-term effects of malnourishment in insects. Wild bee abundance and diversity is decreasing ( 3 ), due in part to poor nutritional landscapes ( 4 ). The honeybee is an ideal model organism to study effects of malnourishment on behavior for the diversity of methods available and to serve as a proxy for effects of malnutrition on wild bees ( 5 ).…”

Section: Introductionmentioning

confidence: 99%

Honeybees are buffered against undernourishment during larval stages

Schilcher

Hilsmann²,

Ankenbrand³

et al. 2022

Front. Insect Sci.

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The negative impact of juvenile undernourishment on adult behavior has been well reported for vertebrates, but relatively little is known about invertebrates. In honeybees, nutrition has long been known to affect task performance and timing of behavioral transitions. Whether and how a dietary restriction during larval development affects the task performance of adult honeybees is largely unknown. We raised honeybees in-vitro, varying the amount of a standardized diet (150 µl, 160 µl, 180 µl in total). Emerging adults were marked and inserted into established colonies. Behavioral performance of nurse bees and foragers was investigated and physiological factors known to be involved in the regulation of social organization were quantified. Surprisingly, adult honeybees raised under different feeding regimes did not differ in any of the behaviors observed. No differences were observed in physiological parameters apart from weight. Honeybees were lighter when undernourished (150 µl), while they were heavier under the overfed treatment (180 µl) compared to the control group raised under a normal diet (160 µl). These data suggest that dietary restrictions during larval development do not affect task performance or physiology in this social insect despite producing clear effects on adult weight. We speculate that possible effects of larval undernourishment might be compensated during the early period of adult life.

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Section: Introductionmentioning

confidence: 99%

Honeybees are buffered against undernourishment during larval stages

Schilcher

Hilsmann²,

Ankenbrand³

et al. 2022

Front. Insect Sci.

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“…Since Osmia larvae live exclusively on pollen provisions, pesticide exposure may seriously affect development and reduce the next season’s bee population. Furthermore, Osmia bees are univoltine, and their populations do not recover from pesticide poisoning within the same season as multivoltine social bees (e.g., honey bees and bumble bees) 17 .…”

Section: Mainmentioning

confidence: 99%

Systemic pesticides in a solitary bee pollen food store affect larval development and increase pupal mortality

Phan

Joshi

Rajotte

et al. 2022

Preprint

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SummarySolitary bees are often exposed to various pesticides applied for pest control on farmland while providing pollination services to food crops1. Increasing evidence suggests that sublethal toxicity of agricultural pesticides affects solitary bees differently than the social bees used to determine regulatory thresholds like honey bees and bumblebees2–4. Studies on solitary bees are challenging because of the difficulties in obtaining large numbers of eggs or young larvae for bioassays. Here we show the toxic and sublethal developmental effects of four widely used plant systemic pesticides on the Japanese orchard bee (Osmia cornifrons). Pollen food stores of this solitary bee were treated with different concentrations of three insecticides (acetamiprid, flonicamid, and sulfoxaflor) and a fungicide (dodine). Eggs were transplanted to the treated pollen and larvae were allowed to feed on the pollen stores after egg hatch. The effects of chronic ingestion of contaminated pollen were measured until adult eclosion. This year-long study revealed that chronic exposure to all tested pesticides delayed larval development and lowered larval and adult body weights. Additionally, exposure to the systemic fungicide resulted in abnormal larval defecation and increased mortality at the pupal stage, indicating potential risk to bees from fungicide exposure. These findings demonstrate potential threats to solitary bees from systemic insecticides and fungicides and will help making policy decisions for mitigating these effects.

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