I covered the very real concern about honeybees a couple of posts ago; here's a more general article about the threat to food supplies from climate change:
Food supply under assault as climate warms
“We are in the midst of dramatic assault on the security of the food supply,” said Dr. Robert S. Lawrence, director of the Center for a Livable Future, part of the Johns Hopkins Bloomberg School of Public Health. The group promotes ecological research into the nexus of diet, food production, environment and human health.One of the problems highlighted in the article is that warmer weather allows more plant pathogens to attack crops - a serious problem for coffee, for one thing.
The primary culprit of all this menu mayhem is climate change, which is choking off certain crops already weakened by both genetic tinkering and chemically based farming, some experts contend."
That's a definite wake-up call.