Results 71 to 80 of about 133,960 (214)

Local influence of floral resource attributes on urban bumble bee foraging activity

Frontiers in Sustainable Cities, 2023
IntroductionUrbanization diminishes the extent of uncompacted, exposed soil and the coverage of wild plant species, yet still supports diverse pollinator communities when their habitat is maintained within the built environment.
Vera W. Pfeiffer, Vera W. Pfeiffer, Jun Zhu, Karen Poh, Janet Silbernagel, Janet Silbernagel   +5 more
doaj   +1 more source

Influence of elevation, climate, snowmelt and floral abundance on body size of solitary bees

Ecological Entomology, EarlyView.
We measured body size in bee species from a 10‐year specimen collection from Colorado sub‐alpine meadows (2450–3450 m) and tested effects of elevation and annual snowmelt, climate and floral abundance. 2 out of 4 bee species collected across a broad elevation range showed a decline in body size with higher elevations; the other two showed no effect ...
Lachlan C. Jones, Melanie R. Kazenel, Kristin Conrad, Jane E. Ogilvie, Ian K. Breckheimer, Rebecca E. Irwin   +5 more
wiley   +1 more source

Is urbanisation a barrier to genetic diversity in the solitary specialist bee, Melissodes druriellus?

Insect Conservation and Diversity, EarlyView.
Bees are integral pollinators commonly found in and supported by urban green spaces; however, their eco‐evolutionary response to urbanisation varies interspecifically. While several studies have explored the population and landscape genetics of bees in response to urbanisation, few have examined solitary or specialist species which may be more ...
Anthony C. Ayers, Sargon Yousefian Dezag Tekkie, S. Eryn McFarlane, Sandra M. Rehan   +3 more
wiley   +1 more source

Vermont Bumble Bee Survey - Manual for Participants

, 2018
The Vermont Bumble Bee Survey aimed to document the past and current relative abundance and distribution of bumble bees (Bombus) as well as the Eastern Carpenter Bee (Xylocopa virginica) across the state. This was a manual for citizen science volunteers.
Kent McFarland (457593)
core   +1 more source

What currency do bumble bees maximize? [PDF]

PLoS ONE, 2010
In modelling bumble bee foraging, net rate of energetic intake has been suggested as the appropriate currency. The foraging behaviour of honey bees is better predicted by using efficiency, the ratio of energetic gain to expenditure, as the currency.
Nicholas L Charlton, Alasdair I Houston
doaj   +1 more source

Floral resource availability and surrounding land cover influence bumble bee community composition in an agricultural landscape

Insect Conservation and Diversity, EarlyView.
Multispecies occupancy models indicated that the occurrence of bumble bees was associated with local floral resources as well as the landscape surrounding a site within 1.6 km. Estimated species richness was greater at sites with more forest cover and lower at sites with more corn and soybean agriculture in the surrounding landscape.
Kelsey N. Shepherd, Anna M. Tucker, Amy L. Toth   +2 more
wiley   +1 more source

Agricultural intensification shapes community composition and parasite prevalence of native but not introduced bumble bees

Basic and Applied Ecology
Bumble bees are important pollinators of crops and native plants, yet face widespread declines linked to agricultural intensification and parasite pressure.
Jenna B. Melanson, Tyler T. Kelly, Susan Waters, Claire Kremen, Lauren C. Ponisio   +4 more
doaj   +1 more source

Roadside pollinator populations and the negative impact of intensive roadside vegetation maintenance

Insect Conservation and Diversity, EarlyView.
Less intensively managed roadsides had higher numbers of flower flies and bees; bee diversity was also higher in those roadsides. Community composition was similar across both management types, indicating that roadsides support a fairly homogeneous pollinator community, regardless of management.
Gil F. G. Miranda, Tracey Etwell, Vincent K. Fyson, Sophie Cardinal, Carolyn Callaghan, Jessica R. K. Forrest   +5 more
wiley   +1 more source

Managed honey bee colony losses in Canada, China, Europe, Israel and Turkey, for the winters of 2008-9 and 1009-10 [PDF]

, 2012
In 2008 the COLOSS network was formed by honey bee experts from Europe and the USA. The primary objectives set by this scientific network were to explain and to prevent large scale losses of honey bee (Apis mellifera) colonies.
Charriere, Jean-Daniel, Kristiansen, Preben, Wei, Shi, Kralj, Jasna, Peterson, Magnus, Brodschneider, Robert, Coffey, Mary F., Crailsheim, Karl, Santrac, Violeta, Chlebo, Robert, Dahle, Bjorn, Pernal, Stephen F., Dahle, Bjørn, Kezic, Nicola, Bach Kim Nguyen, Coffey, Mary F, Kauko, Lassi, Soroker, Victoria, Gray, Alison, Mutinelli, Franco, Gajda, Anna, Nguyen, Bach Kim, Topolska, Grazyna, Bach Kim Nguyen, Bach Kim Nguyen, Pisa, Lennard, Ramsay, Gavin, van der Zee, Romee, Kence, Meral, Kiprijanovska, Hrisula, Wilkins, Selwyn, Otten, Christoph, Ozkirim, Asli, Drazic, Marica M., Drazic, Marica M, Kence, Aykut, Higes, Mariano, Uzunov, Aleksander, Andonov, Sreten, Hernandez, Raquel Martin, Vejsnaes, Flemming, Martin Hernandez, Raquel, Uzunov, Aleksandar   +41 more
core   +1 more source

Comparing species richness and abundance of bumble bees between urban and natural areas using a photographic survey approach

Frontiers in Ecology and Evolution
Bumble bees are essential pollinators that provide critical ecosystem services yet, studies are documenting global species declines while recognizing those declines may be understated due to insufficient baseline data.
Janelle MacLeod, Marina Silva-Opps, Javier Sanchez   +2 more
doaj   +1 more source