Content on Facebook informs professional bloggers’ posts more than any other type of media.

That’s an extrapolation from Technorati’s latest annual survey of the blogosphere.

Facebook remains the most popular form of social media, and the latter dictates what pro bloggers post more than any other source of information.

This continues a trend we documented last year, and expect to see in subsequent surveys.

This year, the survey found that over 60 percent of all bloggers use social media to follow the brands that they blog about.

And 14 percent of bloggers spend at least 21 hours a week on Facebook (we’re in that demographic), according to Technorati.

Readers, what does this trend mean for media over the long term?