Nutritional landscape of managed honey bee colonies in Mexico

Apidologie, Journal Year: 2025, Volume and Issue: 56(2)

Published: April 1, 2025

Language: Английский

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Taxonomic and Functional Diversity of Bees in Traditional Agroecosystems and Tropical Forest Patches on the Yucatan Peninsula

Tropical Conservation Science, Journal Year: 2024, Volume and Issue: 17

Published: Jan. 1, 2024

Background and Research Objectives: Habitat matrices of intensive agricultural use are generally inhospitable to native bees in fragmented forests. However, some tropical regions the world, landscapes dominated by traditional agroecosystems, which harbor high plant diversity subject low-intensity management. These agroecosystems can therefore provide suitable habitats important floral resources for bee community. The objective this study was compare taxonomic functional forest patches within an landscape Yucatan Peninsula. Methods: Sampling conducted two (homegardens a rainfed polyculture known as milpa) control (N= 24 sites total. Hereafter: habitats), using complementary sampling techniques: pan traps sweep net. Taxonomic metrics were calculated compared among habitats. Results: three similar terms diversity. Differences only detected inverse Simpson’s index number groups (functional entities), with higher values than forest. Conclusion: patches, suggesting that these temporal adequate most movement is possible Conservation Implications: Maintenance management practices (agro)biodiversity found crucial conservation bees. It incorporate systems into strategies at level. Since forests have different land tenure (government, private, communal), level require involvement sectors society.

Language: Английский

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Nutrients or resin? – The relationship between resin and food foraging in stingless bees

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(2)

Published: Feb. 1, 2024

Stingless bees are important pollinators in tropical forests. Yet, we know little about their foraging behavior (e.g., nutritional requirements or floral sources visited for resource collection). Many stingless not only depend vitally on pollen and nectar food but also resin nest building and/or defense. However, it is unclear whether the large effort devoted to collecting as a non-food by certain affects behavior. Therefore, this study, analyzed differences patterns (i.e., activity, proportion of collected resources, specialization plants visited) composition sucrose amount amino acids pollen) seven different bee species (eleven wild colonies) north-western Ecuador with particular focus role collection. We found that high intake tended be more active than low intake. The foragers per minute invested collection were similar across all species. Sucrose differed between some was affected increased Interestingly, collectors partly Pollen acid profiles largely, completely, overlapped two groups. Our findings show plant choices may vary depending intake, highlighting need research focusing use bees.

Language: Английский

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Land‐use affects pollinator‐specific resource availability and pollinator foraging behaviour

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(3)

Published: March 1, 2024

Abstract Land‐use management is a key factor causing pollinator declines in agricultural grasslands. This decline can not only be directly driven by land‐use (e.g., habitat loss) but also indirectly mediated through reduction floral resource abundance and diversity, which might turn affect health foraging. We conducted surveys of the flowering plant species behavioural observations two common generalist species, namely bumblebee Bombus lapidarius syrphid fly Episyrphus balteatus , managed grasslands variable intensity (LUI) to investigate whether affects (1) availability pollinators, (2) their host selection (3) foraging behaviour. have found that composition were used as investigated depends on practices such mowing or grazing. bumblebees, flies, visit different plants depending LUI type. Furthermore, changed behaviour via plot‐level flower diversity abundance. For example, bumblebees show longer flight durations with decreasing cover indicating higher energy expenditure when intensive plots. Syrphid flies generally less affected local land use, showing how groups differently react change. Overall, we change composition, for potentially contribute

Language: Английский

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Effects of floral resources on honey bee populations in Mexico: Using dietary metabarcoding to examine landscape quality in agroecosystems

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(6)

Published: June 1, 2024

Abstract The decline of honey bee populations significantly impacts the human food supply due to poor pollination and yield decreases essential crop species. Given reduction pollinators, research into critical landscape components, such as floral resource availability land use change, might provide valuable information about nutritional status health colonies. To address this issue, we examine effects factors like agricultural area, urban climatic factors, including maximum temperature, minimum relative humidity, precipitation, on hive 326 colonies across varying landscapes in Mexico. DNA metabarcoding facilitated precise identification pollen from 267 plant species, encompassing 243 genera 80 families, revealing a primary herb‐based diet. Areas characterized by high diversity exhibited greater within colony. Conversely, situated regions with higher proportions demonstrated lower density. ambient temperature outside hives positively correlated diversity, aligning simultaneous decrease humidity influenced both density colony foraged pollen. Our national‐level study investigated dietary size different habitat types, latitudes, conditions, varied levels types disturbances. This effort was taken gain better insight mechanisms driving declines populations. illustrates need for more biodiverse landscapes, preservation diverse habitats, conservation natural semi‐natural spaces. These measures can help improve quality other well restore ecosystem processes, pest control.

Language: Английский

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A common protocol for reliable comparison of pollen fatty acid profiles: highlighting pitfalls and proposing a methodology for ecological research

Frontiers in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 11

Published: May 31, 2023

Introduction Pollen is an important tissue in plants that plays a vital role plant reproduction as it carries male gametes and occasionally also serves pollinator reward. There has been increasing interest pollen chemistry due to the impact of chemical variation on choices well-being, especially bees. The fat content lipid-to-protein ratio have shown play crucial regulating intake, some bee species avoid overconsumption fatty acids while specific acid ratios are essential for cognition. Therefore, knowledge composition understanding plant-pollinator interactions. However, existing methods analyses not always acids, non-pollen-derived can easily contaminate samples, making comparison between different impossible. Hence, objectives our study were highlight common mistakes pitfalls made during extraction analysis propose protocol reliable comparisons samples. Methods proposed method, developed two labs using gas chromatograph/mass spectrometers chromatograph/flame ionization detectors, involved manually homogenizing pollen, extracting with chloroform:methanol (2:1), analyzing chromatography (GC) mass spectrometry (MS) flame detector (FID) identification quantification. Results We found many present plastic materials solvents commonly used labs, cautioning against use recommending blank samples determine level contamination. suggest adding internal standard checking MS FID’s saturation limit before starting homogenization. Discussion Our method generated profiles from analyzed we hope blueprint achieving methodology characterizing comparing ecological research.

Language: Английский

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Exposure to sublethal concentration of flupyradifurone alters sexual behavior and cuticular hydrocarbon profile in Heriades truncorum, an oligolectic solitary bee

Insect Science, Journal Year: 2023, Volume and Issue: 31(3), P. 859 - 869

Published: Aug. 21, 2023

Abstract The aboveground oligolectic bee, Heriades truncorum , is a particularly good model for studying the impact of pesticides on sexual communication, since some aspects its mating behavior have previously been described. We tested (1) interference pesticide flupyradifurone male precopulatory and partner preferences, (2) way that interferes in quality assessment by female, (3) effects chemical compounds female cuticle. exposed bees both sexes to sublethal concentration flupyradifurone. Various behaviors were registered arena with two females (one unexposed one exposed) (either or exposed). Unexposed males quicker attempt mate. Treatment also impacted females. Males approached more quickly than insecticide‐exposed ones. Females insecticide produced lower amounts cuticular hydrocarbons (sex pheromone candidates) appeared less choosy Our findings suggest exposure affects playing role preference female.

Language: Английский

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Landscape heterogeneity correlates with bee and pollen diversity while size and specialization degree explain species-specific responses of wild bees to the environment

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176595 - 176595

Published: Sept. 30, 2024

Language: Английский

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Floral resources,energetic value and pesticide residues in provisions collected by Osmia bicornis along a gradient of oilseed rape coverage

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

Published: Aug. 17, 2023

Abstract Pollinators in agricultural landscapes are facing global decline and the main pressures include food scarcity pesticide usage. Intensive may provide important resources for wild pollinators via mass flowering crops. However, these monofloral, short-term, contain residues. We explored how landscape composition with a different proportion of oilseed rape (6–65%) around Osmia bicornis nests affects floral diversity, contamination pesticides, energetic value provisions collected by this species bees as their offspring. Altogether, pollen from 28 plant taxa (6–15 per nest) were dominated Brassica napus (6.0–54.2%, median 44.4%, 12 nests), Quercus sp. (1.2–19.4%, 5.2%, Ranunculus (0.4–42.7%, 4.7%, Poaceae (1.2–59.9%, 5.8%, 11 nests) Acer (0.6–42%, 18.0%, 8 nests). Residues pesticides found provisions, acetamiprid, azoxystrobin, boscalid, dimethoate being most frequently detected at concentrations up to 1.2, 198.4, 16.9 17.8 ng/g (median 0.3, 10.6, 11.3, 4.4 ng/g), respectively. Floral diversity but not Pesticide Risk Index depended on structure. Moreover, decreased, increased diversity. Thus, even structurally simple diverse O. if nest is located close single resource-diverse patch. Both B. non-crop correlated concentrations.

Language: Английский

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

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169494 - 169494

Published: Dec. 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.

Language: Английский

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