keyword
MENU ▼
Read by QxMD icon Read
search

bee pollen

keyword
https://www.readbyqxmd.com/read/28079366/the-neonicotinoid-insecticide-thiacloprid-impacts-upon-bumblebee-colony-development-under-field-conditions
#1
Ciaran Ellis, Kirsty J Park, Penelope Whitehorn, Arthur David, Dave Goulson
The impacts of pesticides, and in particular of neonicotinoids, on bee health remain much debated. Many studies describing negative effects have been criticised as the experimental protocol did not perfectly simulate real-life field scenarios. Here, we placed free-flying bumblebee colonies next to raspberry crops that were either untreated or treated with the neonicotinoid thiacloprid as part of normal farming practice. Colonies were exposed to the raspberry crops for a two week period before being relocated to either a flower-rich or flower-poor site...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28073057/neonicotinoids-transference-from-the-field-to-the-hive-by-honey-bees-towards-a-pesticide-residues-biomonitor
#2
Niell Silvina, Jesús Florencia, Pérez Nicolás, Pérez Cecilia, Pareja Lucía, Silvana Abbate, Carrasco-Letelier Leonidas, Díaz Sebastián, Mendoza Yamandú, Cesio Verónica, Heinzen Horacio
The beehive as a quantitative monitor of pesticide residues applied over a soybean crop was studied through a semi field experiment of controlled exposure of honey bees to pesticides in macro tunnels. The distribution within exposed beehives of pesticides commonly used in soybean plantation, was assessed. Residue levels of insecticides in soybean leaves, honey bees, wax, honey and pollen were analyzed. The transference from pesticides present in the environment into the beehive was evidenced. The obtained results allow relating pesticide concentrations present in the environment with traces found in foraging bees...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28069631/pollination-reservoirs-in-lowbush-blueberry-ericales-ericaceae
#3
E M Venturini, F A Drummond, A K Hoshide, A C Dibble, L B Stack
Pollinator-dependent agriculture heavily relies upon a single pollinator-the honey bee. To diversify pollination strategies, growers are turning to alternatives. Densely planted reservoirs of pollen- and nectar-rich flowers (pollination reservoirs, hereafter "PRs") may improve pollination services provided by wild bees. Our focal agroecosystem, lowbush blueberry (Vaccinium angustifolium Aiton), exists in a simple landscape uniquely positioned to benefit from PRs. First, we contrast bee visitation rates and use of three types of PR...
January 9, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28062536/a-comparison-of-honey-bee-collected-pollen-from-working-agricultural-lands-using-light-microscopy-and-its-metabarcoding
#4
M D Smart, R S Cornman, D D Iwanowicz, M McDermott-Kubeczko, J S Pettis, M S Spivak, C R V Otto
Taxonomic identification of pollen has historically been accomplished via light microscopy but requires specialized knowledge and reference collections, particularly when identification to lower taxonomic levels is necessary. Recently, next-generation sequencing technology has been used as a cost-effective alternative for identifying bee-collected pollen; however, this novel approach has not been tested on a spatially or temporally robust number of pollen samples. Here, we compare pollen identification results derived from light microscopy and DNA sequencing techniques with samples collected from honey bee colonies embedded within a gradient of intensive agricultural landscapes in the Northern Great Plains throughout the 2010-2011 growing seasons...
January 6, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28057943/taxonomic-description-of-in-situ-bee-pollen-from-the-middle-eocene-of-germany
#5
FriĐgeir Grímsson, Reinhard Zetter, Conrad C Labandeira, Michael S Engel, Torsten Wappler
The middle Eocene Messel and Eckfeld localities are renowned for their excellently preserved faunas and diverse floras. Here we describe for the first time pollen from insect-pollinated plants found in situ on well-preserved ancient bees using light and scanning electron microscopy. There have been 140 pollen types reported from Messel and 162 pollen types from Eckfeld. Here we document 23 pollen types, six from Messel and 18 from Eckfeld (one is shared). The taxa reported here are all pollinated by insects and mostly not recovered in the previously studied dispersed fossil pollen records...
January 2, 2017: Grana
https://www.readbyqxmd.com/read/28045085/expression-of-acetylcholinesterase-1-is-associated-with-brood-rearing-status-in-the-honey-bee-apis-mellifera
#6
Young Ho Kim, Ju Hyeon Kim, Kyungmun Kim, Si Hyeock Lee
Acetylcholinesterase 1 (AmAChE1) of the honey bee, Apis mellifera, has been suggested to have non-neuronal functions. A systematic expression profiling of AmAChE1 over a year-long cycle on a monthly basis revealed that AmAChE1 was predominantly expressed in both head and abdomen during the winter months and was moderately expressed during the rainy summer months. Interestingly, AmAChE1 expression was inhibited when bees were stimulated for brood rearing by placing overwintering beehives in strawberry greenhouses with a pollen diet, whereas it resumed when the beehives were moved back to the cold field, thereby suppressing brood rearing...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28038411/potential-supply-of-floral-resources-to-managed-honey-bees-in-natural-mistbelt-forests
#7
Sylvanus Mensah, Ruan Veldtman, Thomas Seifert
Honey bees play a vital role in the pollination of flowers in many agricultural systems, while providing honey through well managed beekeeping activities. Managed honey bees rely on the provision of pollen and nectar for their survival and productivity. Using data from field plot inventories in natural mistbelt forests, we (1) assessed the diversity and relative importance of honey bee plants, (2) explored the temporal availability of honey bee forage (nectar and pollen resources), and (3) elucidated how plant diversity (bee plant richness and overall plant richness) influenced the amount of forage available (production)...
December 27, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/28032267/flower-visitors-of-campanula-are-oligoleges-more-sensitive-to-host-specific-floral-scents-than-polyleges
#8
Katharina Brandt, Stefan Dötterl, Wittko Francke, Manfred Ayasse, Paulo Milet-Pinheiro
The pollen diet provided by adult bees to their offspring varies immensely. While some species collect pollen on several plants irrespective of their phylogenetic relatedness (polyleges), others collect only on plants within a genus or family (oligoleges). Floral scents play a central role in bee-plant interactions. To locate flowers, polyleges are assumed to rely on compounds commonly found as floral scent constituents, whereas oligoleges rely on unusual compounds to recognize host flowers unambiguously. Campanula flowers are visited by both polylectic and oligolectic species, and their scent bouquets consist of common and unusual (e...
December 28, 2016: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28028090/native-bee-diversity-and-pollen-foraging-specificity-in-cultivated-highbush-blueberry-ericaceae-vaccinium-corymbosum-in-rhode-island
#9
Zachary Scott, Howard S Ginsberg, Steven R Alm
We identified 41 species of native bees from a total of 1,083 specimens collected at cultivated highbush blueberry plantings throughout Rhode Island in 2014 and 2015. Andrena spp., Bombus spp., and Xylocopa virginica (L.) were collected most often. Bombus griseocollis (DeGeer), B. impatiens Cresson, B. bimaculatus Cresson, B. perplexus Cresson, and Andrena vicina Smith collected the largest mean numbers of blueberry pollen tetrads. The largest mean percent blueberry pollen loads were carried by the miner bees Andrena bradleyi Viereck (91%), A...
December 2016: Environmental Entomology
https://www.readbyqxmd.com/read/28005943/interspecific-variation-in-bumblebee-performance-on-pollen-diet-new-insights-for-mitigation-strategies
#10
Romain Moerman, Nathalie Roger, Roland De Jonghe, Denis Michez, Maryse Vanderplanck
Bumblebees (i.e. Bombus genus) are major pollinators of flowering wild plants and crops. Although many species are currently in decline, a number of them remain stable or are even expanding. One factor potentially driving changes in bumblebee distribution is the suitability of plant communities. Actually, bees probably have specific nutritional requirements that could shape their floral choices and constraint them in the current context of global change. However, most studies primarily focus on one bumblebee species at a time, making comparative studies scarce...
2016: PloS One
https://www.readbyqxmd.com/read/27997039/euglossine-bees-mediate-only-limited-long-distance-gene-flow-in-a-tropical-vine
#11
Øystein H Opedal, Mohsen Falahati-Anbaran, Elena Albertsen, W Scott Armbruster, Rocío Pérez-Barrales, Hans K Stenøien, Christophe Pélabon
Euglossine bees (Apidae: Euglossini) have long been hypothesized to act as long-distance pollinators of many low-density tropical plants. We tested this hypothesis by the analysis of gene flow and genetic structure within and among populations of the euglossine bee-pollinated vine Dalechampia scandens. Using microsatellite markers, we assessed historical gene flow by the quantification of regional-scale genetic structure and isolation by distance among 18 populations, and contemporary gene flow by the estimation of recent migration rates among populations...
December 20, 2016: New Phytologist
https://www.readbyqxmd.com/read/27994042/male-bumblebees-perform-learning-flights-on-leaving-a-flower-but-not-when-leaving-their-nest
#12
Théo Robert, Elisa Frasnelli, Thomas S Collett, Natalie Hempel de Ibarra
Female bees and wasps demonstrate, through their performance of elaborate learning flights, when they memorise features of a significant site. An important feature of these flights is that the insects look back to fixate the site that they are leaving. Females, which forage for nectar and pollen and return with it to the nest, execute learning flights on their initial departures from both their nest and newly discovered flowers. To our knowledge, these flights have so far only been studied in females. Here we describe and analyse putative learning flights observed in male bumblebees, Bombus terrestris L...
December 19, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27976038/chemical-analysis-and-total-phenolic-content-of-cistus-creticus-bee-pollen
#13
E Atsalakis, K Graikou, I Chinou
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27975774/comparison-of-genotoxicity-potentials-between-crude-thai-bee-pollen-and-its-extracts
#14
T Ratanavalachai, S Thitiorul, W Jenkhetkan, C Jansom, A Itharat
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27907097/levels-of-selected-persistent-organic-pollutants-pcb-pbde-and-pesticides-in-honey-bee-pollen-sampled-in-poland
#15
Marek Łukasz Roszko, Marta Kamińska, Krystyna Szymczyk, Renata Jędrzejczak
Chemical plant protection is a commonly discussed factor potentially responsible for decline in pollinators and other beneficial insect populations. Various groups of chemicals including persistent organic pollutants could impact a bee colony's welfare and are reported to be present in bee tissue and apiary products. The aim of this work was to evaluate the presence of selected persistent organic pollutant and pesticide residues in bee pollen originating from different geographical regions of Poland. Pesticide residues were identified in 60% of tested bee pollen samples...
2016: PloS One
https://www.readbyqxmd.com/read/27890965/beescout-a-model-of-bee-scouting-behaviour-and-a-software-tool-for-characterizing-nectar-pollen-landscapes-for-beehave
#16
M A Becher, V Grimm, J Knapp, J Horn, G Twiston-Davies, J L Osborne
Social bees are central place foragers collecting floral resources from the surrounding landscape, but little is known about the probability of a scouting bee finding a particular flower patch. We therefore developed a software tool, BEESCOUT, to theoretically examine how bees might explore a landscape and distribute their scouting activities over time and space. An image file can be imported, which is interpreted by the model as a "forage map" with certain colours representing certain crops or habitat types as specified by the user...
November 24, 2016: Ecological Modelling
https://www.readbyqxmd.com/read/27883009/bumble-bee-parasite-strains-vary-in-resistance-to-phytochemicals
#17
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/27867216/investigating-the-impacts-of-field-realistic-exposure-to-a-neonicotinoid-pesticide-on-bumblebee-foraging-homing-ability-and-colony-growth
#18
Dara A Stanley, Avery L Russell, Sarah J Morrison, Catherine Rogers, Nigel E Raine
The ability to forage and return home is essential to the success of bees as both foragers and pollinators. Pesticide exposure may cause behavioural changes that interfere with these processes, with consequences for colony persistence and delivery of pollination services.We investigated the impact of chronic exposure (5-43 days) to field-realistic levels of a neonicotinoid insecticide (2·4 ppb thiamethoxam) on foraging ability, homing success and colony size using radio frequency identification (RFID) technology in free-flying bumblebee colonies...
October 2016: Journal of Applied Ecology
https://www.readbyqxmd.com/read/27861777/direct-benefits-and-indirect-costs-of-warm-temperatures-for-high-elevation-populations-of-a-solitary-bee
#19
Jessica R K Forrest, Sarah P M Chisholm
Warm temperatures are required for insect flight. Consequently, warming could benefit many high-latitude and high-altitude insects by increasing opportunities for foraging or oviposition. However, warming can also alter species interactions, including interactions with natural enemies, making the net effect of rising temperatures on population growth rate difficult to predict. We investigated the temperature-dependence of nesting activity and lifetime reproductive output over 3 yr in subalpine populations of a pollen-specialist bee, Osmia iridis...
November 14, 2016: Ecology
https://www.readbyqxmd.com/read/27860055/comparative-reproductive-biology-and-pollinator-specificity-among-sympatric-gomesa-orchidaceae-oncidiinae
#20
E R Pansarin, I Alves-Dos-Santos, L M Pansarin
The incredible pollination mechanisms displayed by orchid flowers has inspired biologists over the centuries. Based on the intriguing flower structures, the relationship among orchid species and their pollinators has been frequently regarded as very specialised. Given that visits on flowers pollinated by oil-collecting bees are regularly rare, and in Oncidiinae the flowers frequently attractexclusively species that act as effective pollinators, the comparative reproductive biology and pollinator specificity of two sympatric Gomesa (G...
November 11, 2016: Plant Biology
keyword
keyword
48421
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"