Biologists track the invasion of herbicide-resistant weeds into southwestern Ontario

A team led by biologists have identified the ways in which herbicide-resistant strains of the invasive common waterhemp weed have emerged in fields of soy and corn in southwestern Ontario. The resistance, first detected in 2010, spread thanks to two mechanisms: either pollen and seeds of resistant plants were physically dispersed by wind, water and other means, or resistance appeared through the spontaneous emergence of mutations that then spread.

Read more

Brave new world: Simple changes in intensity of weather events 'could be lethal'

Faced with extreme weather events and unprecedented environmental change, animals and plants are scrambling to catch up — with mixed results. A new model helps to predict the types of changes that could drive a given species to extinction.

Read more

Purple martin migration behavior perplexes researchers

Purple martins will soon migrate south for their usual wintertime retreat, but this time the birds will be wearing what look like little backpacks, so scientists can track their roosting sites along the way. The researchers recently discovered that purple martins are roosting in small forest patches as they migrate from North America to Brazil, an unexpected behavior.

Read more

Are humans preventing flies from eavesdropping?

Soundscapes may influence the evolution of tightly co-evolved host-parasitoid relationships. Both traffic noise and natural ocean noise were found to inhibit parasitoid Ormia fly orientation to sound, which affects reproduction of the fly and survival of the cricket host.

Read more