Results 111 to 120 of about 76,329 (250)

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

Difference and the Liberation of Sufficient Reason

European Journal of Philosophy, EarlyView.
Abstract The Principle of Sufficient Reason (PSR) holds that every event and entity can be explained by a sufficient reason or cause. Philosophers have long struggled with the question of the PSR's compatibility with freedom, for if what occurs or exists follows necessarily from its sufficient reason then it seems it could not have been otherwise ...
Louis Matheou
wiley   +1 more source

Bumble bees at home and at school

, 1997
Do you know how bumble bees live and what they need? You can discover a lot about bumble bees if you watch them while they visit flowers. This article is a shortened version of a chapter from the IBRA publication Bumble bees for pleasure and profit*, and
Kwak, MM
core   +1 more source

Review of the methods to determine the hazard and toxicity of pesticides to bumblebees [PDF]

, 2001
Methods to determine the impact of pesticides on bumblebees are described. They are classified into laboratory tests to determine the acute toxicity and the hazard to bumblebees, (semi) field tests, and brood tests.
Steen, J.J.M., van der, van der Steen, J.J.M., Jozef J.M. van der Steen, van Der Steen, Jozef   +3 more
core   +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

Potential application of the bumblebee foraging recruitment pheromone for commercial greenhouse pollination [PDF]

, 2009
Commercial bumblebee colonies are important crop pollinators. Here we assess whether application of artificial foraging recruitment pheromone can increase foraging activity in Bombus terrestris colonies on a relevant timescale for commercial pollination.
Raine, Nigel E., Lars Chittka, Molet, M., Mathieu Molet, Chittka, Lars, Chittka, L, Raine, NE, Nigel E. Raine, Raine, N. E., Molet, M, Chittka, L., Molet, Mathieu   +11 more
core   +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

CREATING & EVALUATING Artificial Domiciles for Bumble Bees [PDF]

, 2006
Most biologists agree that the availability of suitable nesting sites is a limiting factor for bumble bee populations (Free, 1959). Bumble bees always select areas with preexisting insulation for nesting.
Golick, Douglas A., Beecham, Brady, Ellis, Marion D.   +2 more
core  

Connectivity and Selective Rural Migration

International Economic Review, EarlyView.
ABSTRACT How does infrastructure shape rural development? Using household panel data from a nationally representative sample of Chinese villages, matched to high‐resolution highway maps, we find that road expansion between 2000 and 2015 operates mainly through reallocation, with less productive farmers scaling down or exiting and more productive ...
Lin Ma, Yuan Mei, Qunfeng Wu, Mingzhi (Jimmy) Xu   +3 more
wiley   +1 more source

Bridging the implementation gap in MCABC inventory management: from a taxonomy to practical archetypes

International Transactions in Operational Research, EarlyView.
Abstract Despite increasing demands for resilient and sustainable supply chains, inventory management often relies on outdated single‐criterion analyses. While multi‐criteria ABC (MCABC) analyses provide a theoretically mature assessment of resilience‐sustainability‐benefit trade‐offs in inventory, their adoption remains limited due to fragmented ...
Lukas Grützner, Michael H. Breitner
wiley   +1 more source