Interesting insight from the Pew Project into the way the media ecosystem is evolving.

Since 2006, blogging has dropped among teens and young adults while simultaneously rising among older adults. As the tools and technology embedded in social networking sites change, and use of the sites continues to grow, youth may be exchanging ‘macro-blogging’ for microblogging with status updates.

Blogging has declined in popularity among both teens and young adults since 2006. Blog commenting has also dropped among teens.

* 14% of online teens now say they blog, down from 28% of teen internet users in 2006.

* This decline is also reflected in the lower incidence of teen commenting on blogs within social networking websites; 52% of teen social network users report commenting on friends’ blogs, down from the 76% who did so in 2006.

* By comparison, the prevalence of blogging within the overall adult internet population has remained steady in recent years. Pew Internet surveys since 2005 have consistently found that roughly one in ten online adults maintain a personal online journal or blog.

While blogging among adults as a whole has remained steady, the prevalence of blogging within specific age groups has changed dramatically in recent years. Specifically, a sharp decline in blogging by young adults has been tempered by a corresponding increase in blogging among older adults.