



Expanding forests in the Canadian Rocky Mountains are slowly isolating groups of alpine butterflies from each other, which may lead to the extinction of the colourful insects in some areas, says a new study from the University of Alberta. A rising tree line in the Rockies due to global warming, and a policy not to initiate 'prescribed burns' (intentionally started, controlled fires) in order to manage forest growth, has created the tenuous condition for the alpine butterflies, said Jens Roland, a biological scientist at the University of Alberta…
It's not a good idea to put all your eggs in one basket... unless you're a senita moth. Found in the parched Sonoran desert of southern Arizona and northern Mexico, the senita moth depends on a single plant species - the senita cactus - both for its food and for a place to lay eggs. The senita cactus is equally dependent upon the moth, the only species that pollinates its flowers. Senita cacti and senita moths have a rare, mutually dependent relationship, one of only three known dependencies in which an insect actively pollinates flowers for the purpose of assuring a food resource for its offspring…
A shrunken giant
Oil spill in the Gulf of Mexico nears the coast