Although this is not meant to belittle the present difficulties being endured, I think the honeybee will adapt in Autralia, just as the prarie dog and the coyote do in the States. The pendulum in every aspect of life tends to swing back and forth, whether a short cycle like the prarie dog (prey) VS the coyote (predator) relationship, or a millenial cycle like the complex rhythm of our planet. Considering the truly massive amounts of solar energy absorbed by our planet every day, I don't believe man is the cause of the climate change which is occuring. I think it is part of the rhythm of our planet. Now, it is true we often do an extremely shoddy job of stewardship, and although nature is very quick to erase over man's existence when it is gone, we still need to enact better control of our resources. I was taught to take care of my toys.
Concerning the bees, whether on a small scale such as a neighbor's use of Sevin dust, or a large scale such as wildfire deforestation, I believe the little warrior, the honey bee, will return faster than we think. I am amazed by her resiliancy. As sure as the sun is shining over the clouds of smoke. As sure as the flower buds will poke up from the cold ashes, the bee will prevail.