Publications

comparison of pollen transfer dynamics by multiple floral visitors: experiments with pollen and fluorescent dye.	most plant species are visited by a diversity of floral visitors. pollen transfer of the four most common pollinating bee species and one nectar-robbing bee of the distylous plant gelsemium sempervirens were compared.	2006	16299005
nesting habits influence population genetic structure of a bee living in anthropogenic disturbance.	while most organisms are negatively affected by anthropogenic disturbance, a few species thrive in landscapes altered by humans. typically, native bees are negatively impacted by anthropogenic environmental change, including habitat alteration and climate change. here, we investigate the population structure of the eastern carpenter bee xylocopa virginica, a generalist pollinator with a broad geographic range spanning eastern north america. eastern carpenter bees now nest almost exclusively in a ...	2017	28214357
native bee diversity and pollen foraging specificity in cultivated highbush blueberry (ericaceae: vaccinium corymbosum) in rhode island.	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 ...	2016	28028090
native bee diversity and pollen foraging specificity in cultivated highbush blueberry (ericaceae: vaccinium corymbosum) in rhode island.	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 ...	2016	27744311
multiple criteria for evaluating pollinator performance in highbush blueberry (ericales: ericaceae) agroecosystems.	numerous bee species provide pollination services in agricultural ecosystems. evaluating a pollinator's performance with regard to a crop is an important step in attributing pollination services and predicting how changes in a bee community or foraging environment will affect those services. we used multiple criteria to evaluate pollinators of north carolina highbush blueberry, vaccinium corymbosum l., agroecosystems. for five groups of bees (apis mellifera l., bombus spp., habropoda laboriosa f ...	2013	24280253
some cytological features of follicle cells in an ovariole of the carpenter bee (xylocopa virginica virginica) (l) (hymenoptera: apidae).	in an attempt to provide some essential basic data, currently very sparse, on the ultrastructure of solitary bees, the histology, cytology and ultrastructure of thin and ultrathin sections of ovarioles of the adult carpenter beexylocopa virginica virginica were studied with the light and transmission electron microscopes. the work revealed an apparently previously unreported occurrence of intracellular paired membrane configurations in follicle cells of an ovariole and confirmed the presence in ...	1999	18627866
nectar robbery by bees xylocopa virginica and apis mellifera contributes to the pollination of rabbiteye blueberry.	honey bees, apis mellifera l., probe for nectar from robbery slits previously made by male carpenter bees, xylocopa virginica (l.), at the flowers of rabbiteye blueberry, vaccinium ashei reade. this relationship between primary nectar robbers (carpenter bees) and secondary nectar thieves (honey bees) is poorly understood but seemingly unfavorable for v. ashei pollination. we designed two studies to measure the impact of nectar robbers on v. ashei pollination. first, counting the amount of pollen ...	2004	15279245
for uptake of yolk precursors, epithelial cell-oocyte gap junctional communication is required by insects representing six different orders.	for uptake of vitellogenin protein into nascent yolk spheres, communication through open gap junction channels between the follicle epithelium and oocyte is required by six different insects representing six different orders. it was recently shown in the hemipteran, oncopeltus fasciatus, that endocytic uptake of yolk protein resulting in the formation of nascent yolk spheres depended upon an intact epithelium communicating with the oocyte through patent gap junctions. following treatment with oc ...	2002	12770077