keyword
MENU ▼
Read by QxMD icon Read
search

Bumble bee

keyword
https://www.readbyqxmd.com/read/27883009/bumble-bee-parasite-strains-vary-in-resistance-to-phytochemicals
#1
Evan C Palmer-Young, Ben M Sadd, Philip C Stevenson, Rebecca E Irwin, Lynn S Adler
Nectar and pollen contain diverse phytochemicals that can reduce disease in pollinators. However, prior studies showed variable effects of nectar chemicals on infection, which could reflect variable phytochemical resistance among parasite strains. Inter-strain variation in resistance could influence evolutionary interactions between plants, pollinators, and pollinator disease, but testing direct effects of phytochemicals on parasites requires elimination of variation between bees. Using cell cultures of the bumble bee parasite Crithidia bombi, we determined (1) growth-inhibiting effects of nine floral phytochemicals and (2) variation in phytochemical resistance among four parasite strains...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27859127/consequences-of-toxic-secondary-compounds-in-nectar-for-mutualist%C3%A2-bees-and-antagonist-butterflies
#2
Patricia L Jones, Anurag A Agrawal
Attraction of mutualists and defense against antagonists are critical challenges for most organisms and can be especially acute for plants with pollinating and non-pollinating flower visitors. Secondary compounds in flowers have been hypothesized to adaptively mediate attraction of mutualists and defense against antagonists, but this hypothesis has rarely been tested. The tissues of milkweeds (Asclepias spp.) contain toxic cardenolides that have long been studied as chemical defenses against herbivores. Milkweed nectar also contains cardenolides, and we have examined the impact of manipulating cardenolides in nectar on the foraging choices of two flower visitors: generalist bumble bees, Bombus impatiens, which are mutualistic pollinators, and specialist monarch butterflies, Danaus plexippus, which are herbivores as larvae and ineffective pollinators as adults...
October 2016: Ecology
https://www.readbyqxmd.com/read/27851750/whole-genome-sequence-analysis-of-bombella-intestini-lmg-28161t-a-novel-acetic-acid-bacterium-isolated-from-the-crop-of-a-red-tailed-bumble-bee-bombus-lapidarius
#3
Leilei Li, Koen Illeghems, Simon Van Kerrebroeck, Wim Borremans, Ilse Cleenwerck, Guy Smagghe, Luc De Vuyst, Peter Vandamme
The whole-genome sequence of Bombella intestini LMG 28161T, an endosymbiotic acetic acid bacterium (AAB) occurring in bumble bees, was determined to investigate the molecular mechanisms underlying its metabolic capabilities. The draft genome sequence of B. intestini LMG 28161T was 2.02 Mb. Metabolic carbohydrate pathways were in agreement with the metabolite analyses of fermentation experiments and revealed its oxidative capacity towards sucrose, D-glucose, D-fructose and D-mannitol, but not ethanol and glycerol...
2016: PloS One
https://www.readbyqxmd.com/read/27846310/improving-mitochondrial-function-protects-bumblebees-from-neonicotinoid-pesticides
#4
Michael B Powner, Thomas E Salt, Chris Hogg, Glen Jeffery
Global pollination is threatened by declining insect pollinator populations that may be linked to neonicotinoid pesticide use. Neonicotinoids over stimulate neurons and depolarize their mitochondria, producing immobility and death. However, mitochondrial function can be improved by near infrared light absorbed by cytochrome c oxidase in mitochondrial respiration. In flies, daily exposure to 670nm light throughout life increases average lifespan and aged mobility, and reduces systemic inflammation. Here we treat bumble bees with Imidacloprid a common neonicotinoid...
2016: PloS One
https://www.readbyqxmd.com/read/27803186/metabolism-of-toxic-sugars-by-strains-of-the-bee-gut-symbiont-gilliamella-apicola
#5
Hao Zheng, Alex Nishida, Waldan K Kwong, Hauke Koch, Philipp Engel, Margaret I Steele, Nancy A Moran
: Social bees collect carbohydrate-rich food to support their colonies, and yet, certain carbohydrates present in their diet or produced through the breakdown of pollen are toxic to bees. The gut microbiota of social bees is dominated by a few core bacterial species, including the Gram-negative species Gilliamella apicola We isolated 42 strains of G. apicola from guts of honey bees and bumble bees and sequenced their genomes. All of the G. apicola strains share high 16S rRNA gene similarity, but they vary extensively in gene repertoires related to carbohydrate metabolism...
November 1, 2016: MBio
https://www.readbyqxmd.com/read/27783434/evolution-of-resistance-to-single-and-combined-floral-phytochemicals-by-a-bumble-bee-parasite
#6
Evan C Palmer-Young, Ben M Sadd, Lynn S Adler
Repeated exposure to inhibitory compounds can drive the evolution of resistance, which weakens chemical defense against antagonists. Floral phytochemicals in nectar and pollen have antimicrobial properties that can ameliorate infection in pollinators, but evolved resistance among parasites could diminish the medicinal efficacy of phytochemicals. However, multi-compound blends, which occur in nectar and pollen, present simultaneous chemical challenges that may slow resistance evolution. We assessed evolution of resistance by the common bumble bee gut parasite Crithidia bombi to two floral phytochemicals, singly and combined, over six weeks (~100 generations) of chronic exposure...
October 26, 2016: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/27742891/bumble-bees-regulate-their-intake-of-the-essential-protein-and-lipid-pollen-macronutrients
#7
A D Vaudo, D Stabler, H M Patch, J F Tooker, C M Grozinger, G A Wright
Bee population declines are linked to reduction of nutritional resources due to land-use intensification, yet we know little about the specific nutritional needs of many bee species. Pollen provides bees their primary source of protein and lipids, but nutritional quality varies widely among host-plant species. Therefore, bees may be adapted to assess resource quality and adjust their foraging behavior to balance nutrition from multiple food sources. We tested the ability of two bumble bee species, Bombus terrestris and B...
October 14, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27709399/review-of-field-and-monitoring-studies-investigating-the-role-of-nitro-substituted-neonicotinoid-insecticides-in-the-reported-losses-of-honey-bee-colonies-apis-mellifera
#8
Richard Schmuck, Gavin Lewis
The nitro-substituted neonicotinoid insecticides, which include imidacloprid, thiamethoxam and clothianidin, are widely used to control a range of important agricultural pests both by foliar applications and also as seed dressings and by soil application. Since they exhibit systemic properties, exposure of bees may occur as a result of residues present in the nectar and/or pollen of seed- or soil-treated crop plants and so they have been the subject of much debate about whether they cause adverse effects in pollinating insects under field conditions...
November 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27705831/predicting-acute-contact-toxicity-of-pesticides-in-honeybees-apis-mellifera-through-a-k-nearest-neighbor-model
#9
F Como, E Carnesecchi, S Volani, J L Dorne, J Richardson, A Bassan, M Pavan, E Benfenati
Ecological risk assessment of plant protection products (PPPs) requires an understanding of both the toxicity and the extent of exposure to assess risks for a range of taxa of ecological importance including target and non-target species. Non-target species such as honey bees (Apis mellifera), solitary bees and bumble bees are of utmost importance because of their vital ecological services as pollinators of wild plants and crops. To improve risk assessment of PPPs in bee species, computational models predicting the acute and chronic toxicity of a range of PPPs and contaminants can play a major role in providing structural and physico-chemical properties for the prioritisation of compounds of concern and future risk assessments...
January 2017: Chemosphere
https://www.readbyqxmd.com/read/27678526/large-scale-monitoring-of-effects-of-clothianidin-dressed-osr-seeds-on-pollinating-insects-in-northern-germany-effects-on-large-earth-bumble-bees-bombus-terrestris
#10
Guido Sterk, Britta Peters, Zhenglei Gao, Ulrich Zumkier
The aim of this study was to investigate the effects of Elado(®)-dressed winter oilseed rape (OSR, 10 g clothianidin & 2 g beta-cyfluthrin/kg seed) on the development, reproduction and behaviour of large earth bumble bees (Bombus terrestris) as part of a large-scale monitoring field study in Northern Germany, where OSR is usually cultivated at 25-33 % of the arable land. Both reference and test sites comprised 65 km(2) in which no other crops attractive to pollinating insects were present. Six study locations were selected per site and 10 bumble bee hives were placed at each location...
November 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27650369/large-scale-monitoring-of-effects-of-clothianidin-dressed-oilseed-rape-seeds-on-pollinating-insects-in-northern-germany-residues-of-clothianidin-in-pollen-nectar-and-honey
#11
Daniel Rolke, Markus Persigehl, Britta Peters, Guido Sterk, Wolfgang Blenau
This study was part of a large-scale monitoring project to assess the possible effects of Elado(®) (10 g clothianidin & 2 g β-cyfluthrin/kg seed)-dressed oilseed rape seeds on different pollinators in Northern Germany. Firstly, residues of clothianidin and its active metabolites thiazolylnitroguanidine and thiazolylmethylurea were measured in nectar and pollen from Elado(®)-dressed (test site, T) and undressed (reference site, R) oilseed rape collected by honey bees confined within tunnel tents. Clothianidin and its metabolites could not be detected or quantified in samples from R fields...
November 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27530075/reliability-of-the-entomovector-technology-using-prestop-mix-and-bombus-terrestris-l-as-a-fungal-disease-biocontrol-method-in-open-field
#12
Reet Karise, Gerit Dreyersdorff, Mona Jahani, Eve Veromann, Eve Runno-Paurson, Tanel Kaart, Guy Smagghe, Marika Mänd
Botrytis cinerea Pers.:Fr. is a major plant pathogen, and a new approach is needed for its control in strawberry to minimise the increasing use of synthetic fungicides. The biofungicide Prestop-Mix, which contains Gliocladium catenulatum, is effective against Botrytis infections; however, the need for frequent applications increases the costs for farmers. Here, we demonstrate that bumble bees, Bombus terrestris L., effectively disseminate the preparation onto flowers in open field conditions. Over the course of three years, we found a highly significant decrease in the rate of Botrytis infection...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27523087/food-limitation-affects-parasite-load-and-survival-of-bombus-impatiens-hymenoptera-apidae-infected-with-crithidia-trypanosomatida-trypanosomatidae
#13
Taylor J Conroy, Evan C Palmer-Young, Rebecca E Irwin, Lynn S Adler
Bumble bees (genus Bombus) are globally important insect pollinators, and several species have experienced marked declines in recent years. Both nutritional limitation and pathogens may have contributed to these declines. While each of these factors may be individually important, there may also be synergisms where nutritional stress could decrease pathogen resistance. Understanding interactions between bumble bees, their parasites, and food availability may provide new insight into the causes of declines. In this study, we examined the combined impacts of pollen and nectar limitation on Crithidia, a common gut parasite in Bombus impatiens Cresson...
October 2016: Environmental Entomology
https://www.readbyqxmd.com/read/27500630/a-novel-behavioral-assay-to-investigate-gustatory-responses-of-individual-freely-moving-bumble-bees-bombus-terrestris
#14
Carolyn Ma, Sébastien Kessler, Alexander Simpson, Geraldine Wright
Generalist pollinators like the buff-tailed bumble bee, Bombus terrestris, encounter both nutrients and toxins in the floral nectar they collect from flowering plants. Only a few studies have described the gustatory responses of bees toward toxins in food, and these experiments have mainly used the proboscis extension response on restrained honey bees. Here, a new behavioral assay is presented for measuring the feeding responses of freely-moving, individual worker bumble bees to nutrients and toxins. This assay measures the amount of solution ingested by each bumble bee and identifies how tastants in food influence the microstructure of the feeding behavior...
2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27478712/comparison-of-buckwheat-red-clover-and-purple-tansy-as-potential-surrogate-plants-for-use-in-semi-field-pesticide-risk-assessments-with-bombus-impatiens
#15
Angela E Gradish, G Christopher Cutler, Andrew J Frewin, Cynthia D Scott-Dupree
Background. Bumble bees (Bombus spp.) are important wild and managed pollinators. There is increased interest in incorporating data on bumble bees into risk assessments for pesticides, but standardized methods for assessing hazards of pesticides in semi-field and field settings have not yet been established for bumble bees. During semi-field studies, colonies are caged with pesticide-treated flowering surrogate plants, which must be attractive to foragers to ensure colony exposure to the test compound, and must produce an ample nectar and pollen to sustain colonies during testing...
2016: PeerJ
https://www.readbyqxmd.com/read/27459775/site-fidelity-by-bees-drives-pollination-facilitation-in-sequentially-blooming-plant-species
#16
Jane E Ogilvie, James D Thomson
Plant species can influence the pollination and reproductive success of coflowering neighbors that share pollinators. Because some individual pollinators habitually forage in particular areas, it is also possible that plant species could influence the pollination of neighbors that bloom later. When flowers of a preferred forage plant decline in an area, site-fidelity may cause individual flower feeders to stay in an area and switch plant species rather than search for preferred plants in a new location. A newly blooming plant species may quickly inherit a set of visitors from a prior plant species, and therefore experience higher pollination success than it would in an area where the first species never bloomed...
June 2016: Ecology
https://www.readbyqxmd.com/read/27411246/effects-of-habitat-composition-and-landscape-structure-on-worker-foraging-distances-of-five-bumble-bee-species
#17
John W Redhead, Stephanie Dreier, Andrew F G Bourke, Matthew S Heard, William C Jordan, Seirian Sumner, Jinliang Wang, Claire Carvell
Bumble bees (Bombus spp.) are important pollinators of both crops and wildflowers. Their contribution to this essential ecosystem service has been threatened over recent decades by changes in land use, which have led to declines in their populations. In order to design effective conservation measures, it is important to understand the effects of variation in landscape composition and structure on the foraging activities of worker bumble bees. This is because the viability of individual colonies is likely to be affected by the trade-off between the energetic costs of foraging over greater distances and the potential gains from access to additional resources...
April 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27391969/contrasting-pollinators-and-pollination-in-native-and-non-native-regions-of-highbush-blueberry-production
#18
Jason Gibbs, Elizabeth Elle, Kyle Bobiwash, Tiia Haapalainen, Rufus Isaacs
Highbush blueberry yields are dependent on pollination by bees, and introduction of managed honey bees is the primary strategy used for pollination of this crop. Complementary pollination services are also provided by wild bees, yet highbush blueberry is increasingly grown in regions outside its native range where wild bee communities may be less adapted to the crop and growers may still be testing appropriate honey bee stocking densities. To contrast crop pollination in native and non-native production regions, we sampled commercial 'Bluecrop' blueberry fields in British Columbia and Michigan with grower-selected honey bee stocking rates (0-39...
2016: PloS One
https://www.readbyqxmd.com/read/27357683/macronutrient-ratios-in-pollen-shape-bumble-bee-bombus-impatiens-foraging-strategies-and-floral-preferences
#19
Anthony D Vaudo, Harland M Patch, David A Mortensen, John F Tooker, Christina M Grozinger
To fuel their activities and rear their offspring, foraging bees must obtain a sufficient quality and quantity of nutritional resources from a diverse plant community. Pollen is the primary source of proteins and lipids for bees, and the concentrations of these nutrients in pollen can vary widely among host-plant species. Therefore we hypothesized that foraging decisions of bumble bees are driven by both the protein and lipid content of pollen. By successively reducing environmental and floral cues, we analyzed pollen-foraging preferences of Bombus impatiens in (i) host-plant species, (ii) pollen isolated from these host-plant species, and (iii) nutritionally modified single-source pollen diets encompassing a range of protein and lipid concentrations...
July 12, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27325896/geographic-consistency-and-variation-in-conflicting-selection-generated-by-pollinators-and-seed-predators
#20
Shi-Guo Sun, W Scott Armbruster, Shuang-Quan Huang
BACKGROUNDS AND AIMS: Floral traits that attract pollinators may also attract seed predators, which, in turn, may generate conflicting natural selection on such traits. Although such selection trade-offs are expected to vary geographically, few studies have investigated selection mediated by pollinators and seed predators across a geographic mosaic of environments and floral variation. METHODS: Floral traits were investigated in 14 populations of the bumble-bee-pollinated herb, Pedicularis rex, in which tubular flowers are subtended by cupular bracts holding rain water...
August 2016: Annals of Botany
keyword
keyword
24914
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"