Results 71 to 80 of about 8,768 (214)

The conservation of bumble bees [PDF]

Bee World, 2003
The approximately 250 known species of bumble bee (genus Bombus) are found predominantly in temperate regions of the northern hemisphere. This region also contains much of the world's human population and the most intensive agricultural regions. Probably as a result of this, many bumble bees appear to be undergoing dramatic declines in range.
openaire   +1 more source

The Late Agricultural Development of Central Arabian Oases—Archaeobotanical and Archaeozoological Studies of the al‐Kharj Oasis

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT While oasis settlements emerged during the Bronze Age in Eastern and Northern Arabia, the settlement process in Central Arabia was different. Excavations at al‐Yamāma—main ancient settlement of the al‐Kharj oasis (Riyadh Province, KSA)—suggest that the latter did not emerge before the second half of the first millennium BCE.
Elora Chambraud, Hervé Monchot, Vladimir Dabrowski, Charlène Bouchaud, Jérémie Schiettecatte   +4 more
wiley   +1 more source

Bumble Bees of Florida

EDIS
This is a general guide to field identification, species description, and biology of the five bumble bee species Bombus spp. found in Florida. This guide to bumble bee identification in Florida would also be usable for coastal South Carolina, Georgia, Alabama, Louisiana, Mississippi, and Arkansas, but it is not comprehensive for the northern ...
Rachel Mallinger, Joel Neylon, T.R. Fasulo, Lionel Stange   +3 more
openaire   +3 more sources

Colony‐level pollen collection reflects visitation of managed bumble bees (Bombus impatiens) in strawberry fields and surrounding landscapes without reducing pollen limitation

Agricultural and Forest Entomology, EarlyView.
We extracted pollen from colony beeswax to quantify season‐long, colony‐level resource use and tested how managed Bombus impatiens visitation and Rosaceae pollen collection relate to landscape context and strawberry pollination. Increased managed bumble bee visitation was not influenced by surrounding landcover, did not reduce pollen limitation and ...
Leeah I. Richardson, Olivia Miller, David Sossa, Aaron Iverson, Scott McArt, Katja Poveda, Heather Grab   +6 more
wiley   +1 more source

The dual crisis: Climate change simultaneously drives pollinator decline and pest outbreaks

Agricultural and Forest Entomology, EarlyView.
Climate change acts as an asymmetric ecological filter, favouring r‐selected pest traits (rapid reproduction, generalism) while disadvantaging K‐selected pollinators. For every 1°C of warming, bee species richness declines ~25% since the 1990s, while pest‐induced crop losses increase by 10%–25%. A network‐centric approach integrating climate‐responsive
Diriba Fufa Serdo
wiley   +1 more source

Bumble Bee Watch community science program increases scientific understanding of an important pollinator group across Canada and the USA.

PLoS ONE
In a time of increasing threats to bumble bees (Hymenoptera: Apidae: Bombus), it is important to understand their ecology and distribution. As experts are limited in resources to conduct field surveys, there is potential for community scientists to help.
Victoria J MacPhail, Richard Hatfield, Sheila R Colla   +2 more
doaj   +1 more source

Coinvasional disruptions to island pollinator networks

Conservation Biology, EarlyView.
Abstract Biological invasions can adversely affect pollinator diversity by threatening the maintenance of animal‐pollinated plant communities. Although most studies have examined single invasive species, accelerating species introductions driven by global trade highlight the need to understand how multiple co‐occurring invaders jointly influence ...
Marta Quitián, Isaac Planas‐Sitjà, Maki Morooka, Anna Traveset, Simon M. Tierney, Adam L. Cronin   +5 more
wiley   +1 more source

The transcription factor Krüppel homolog 1 is linked to hormone mediated social organization in bees

BMC Evolutionary Biology, 2010
Background Regulation of worker behavior by dominant queens or workers is a hallmark of insect societies, but the underlying molecular mechanisms and their evolutionary conservation are not well understood.
Fan Yongliang, Cohen Mira, Patch Harland M, Shpigler Hagai, Grozinger Christina M, Bloch Guy   +5 more
doaj   +1 more source

Two Metschnikowia nectar yeast species have similar volatile profiles but elicit differential foraging in bee pollinators

Ecological Entomology, EarlyView.
Yeasts that specialize in flower nectar play an important role in pollination ecology. Metschnikowia reukaufii and Metschnikowia koreensis were the most prevalent nectar yeasts found in our field sites. Bee pollinators exhibited different behavioural responses to nectar yeasts in field experiments. Bees visited more flowers with M.
M. Elizabeth Moore, Lindsey Wilson, Nathan Brandt, Ayako Wada‐Katsumata, Ahmed M. Saveer, Coby Schal, Robert R. Dunn, Rebecca E. Irwin, Caiti Smukowski Heil   +8 more
wiley   +1 more source

The Bumble Bees of Florida

The Florida Entomologist, 1923
A. Outer surface of hind tibiae convex and hairy; face of males black Psithyrus. Abdomen of female entirely dark; that of male very variable P. variabilis. AA. Outer surface of hind tibiae of female concave and smooth; face of male usually with yellow -..-....... Bombus. a. Thorax with a distinct black band. b.
openaire   +1 more source