It wasn't much different. Bumblebees are excellent pollinators and native bees (or solitary bees) can carry out a pollination role in a very similar ways to bees. Hang around a flowerbed for a few minutes, and you'll notice all kinds of tiny, little bees flying around. These little native bees are seldom studied, and it's not well known if the conditions that are affecting honey bee are affecting native bees as well.

Ants are also good insect pollinators. Wind pollinates to a certain extent.