Diverse pollen nutrition can improve the development of solitary bees but does not mitigate negative pesticide impacts

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169494 - 169494

Опубликована: Дек. 22, 2023

Floral resource loss and pesticide exposure are major threats to bees in intensively managed agroecosystems, but interactions among these drivers remain poorly understood. Altered composition lowered diversity of pollen nutrition may reinforce negative impacts on bees. Here we investigated the development survival solitary bee Osmia bicornis provisioned with three different types, as well a mixture types representing higher diversity. We exposed each nutritional treatment five pesticides at concentrations laboratory. Two field-realistic nicotinic acetylcholine receptor (nAChR) modulating insecticides (thiacloprid, sulfoxaflor flupyradifurone), two fungicides (azoxystrobin tebuconazole) were examined. further measured expression detoxification genes (CYP9BU1, CYP9BU2) under thiacloprid across treatments potential mechanistic pathway driving pesticide-nutrition interactions. found that more diverse reduced time, enhanced efficacy (cocoon weight divided by consumed weight) consumption, increased O. after larval weight). Contrary fungicides, high all negatively affected extending times. Moreover, flupyradifurone also cocoon weight, consumption mortality. The differed was not thiacloprid. Our findings highlight nAChR bicornis, no mitigation through These results have important implications for risk assessment pollinators, indicating effects developing currently underestimated.

Язык: Английский

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Long‐distance gene flow in Acacia senegal: Hope for disturbed and fragmented populations

Ecology and Evolution, Год журнала: 2023, Номер 13(7)

Опубликована: Июль 1, 2023

Even though pollen and seed dispersals are some of the important factors that determine tree species survival across landscapes, gene dispersal data tropical dryland such as

Язык: Английский

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High variability in the attractiveness of municipally-planted decorative plants to pollinators

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Янв. 29, 2024

Abstract Insect populations are declining globally. A major driver of this decline is land use change, including urbanisation. However, urban environments can also offer a wide range floral resources to pollinators, through ornamental plantings, but these vary widely in their attractiveness insects. Often, the largest single planter plants an area municipality. Here we evaluated decorative plantings carried out by city municipality Regensburg, Germany, systematically surveying insect visitations on different plant types late summer, when forage often limited for pollinators. We found 130-fold increase from least most attractive plants, and high variation which groups were attracted plants. While honey bees, not conservation concern, common visitors, some very large proportion wild flies, wasps. Our results demonstrate that there great scope increasing supply pollinators general, specific particular, without requiring new be sourced or planted. argue providing local evidence-based guidance municipalities offers quick potentially cost-neutral method supporting populations.

Язык: Английский

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

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Авг. 28, 2024

The global decline in biodiversity and insect populations highlights the urgent 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, O. 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.

Язык: Английский

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High variability in the attractiveness of municipally-planted decorative plants to insects

PeerJ, Год журнала: 2024, Номер 12, С. e17762 - e17762

Опубликована: Ноя. 6, 2024

Insect populations are declining globally. A major driver of this decline is land use change, including urbanisation. However, urban environments can also offer a wide range floral resources to pollinators, through ornamental plantings, but these vary widely in their attractiveness insects. Often, the largest single planter plants an area municipality. Here we evaluated decorative plantings carried out by city municipality Regensburg, Germany, systematically surveying insect visitations on different plant types late summer, when forage often limited for pollinators. We found 130-fold difference from least most attractive plants, and high variation which groups were attracted plants. While honey bees, not conservation concern, common visitors, some very large proportion wild flies, wasps. Our results demonstrate that there great scope increasing supply pollinators general, specific particular, without requiring new be sourced or planted. argue providing local evidence-based guidance municipalities offers quick potentially cost-neutral method supporting populations.

Язык: Английский

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