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Urban bees using plastic to build hives
Date:2/11/2014

Once the snow melts, Canada's bee population will be back in business -- pollinating, making honey and keeping busy doing bee things. For at least two urban bee species, that means making nests out of plastic waste.

A new study by a University of Guelph graduate and a U of G scientist reveals that some bees use bits of plastic bags and plastic building materials to construct their nests. The research was published recently in the journal Ecosphere.

It's an important discovery because it shows bees' resourcefulness and flexibility in adapting to a human-dominated world, says lead author Scott MacIvor, a doctoral student at York University and a 2008 U of G graduate.

"Plastic waste pervades the global landscape," said MacIvor. Although researchers have shown adverse impacts of the material on species and the ecosystem, few scientists have observed insects adapting to a plastic-rich environment, he said.

"We found two solitary bee species using plastic in place of natural nest building materials, which suggests innovative use of common urban materials.

Figuring out that the bees were using plastics in place of natural materials took some detective work by U of G's Andrew Moore, supervisor of analytical microscopy at Laboratory Services.

Moore analyzed a grey "goo" that MacIvor discovered in the nests of one kind of bee, Megachile campanulae, which uses plant resins to build its nests,

"Scott thought it might be chewing gum originally," Moore said. His team uses a scanning electron microscope to take highly detailed pictures of items, x-ray microanalysis to determine the elements in the sample and infrared microscopy to identify polymers. They can distinguish the finest detail on the surface of an animal hair.

Turns out that M. campanulae was occasionally replacing plant resins with polyurethane-based exterior building sealant, such as caulking, in its brood cells--created
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Contact: Scott MacIvor
jsmacivor@gmail.com
416-844-8093
University of Guelph
Source:Eurekalert

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