Do Google Blog Search results cannibalize natural serps ?

[Sgt_Kickaxe]

I have an established site that uses wordpress as a cms but doesn't offer comments and it recently saw a traffic drop of roughly 40%. It no longer shows up for several keywords that it was top 3 for before, no content has changed and it has no ads whatsoever.

I presumed it was a de-ranking though I was at a loss to figure out why but I think I've found a possible reason, blog search.

All of a sudden I'm getting some traffic from blog search for those keywords and several of my best guides now show up prominently on Google's blog search, the same ones that vanished from natural serps.

I've heard of not being able to rank for keywords naturally when an image happens to be tops in image search but does this apply to blog search too? if so, how do I get my site out of blog search again? (it wasn't there 3 months ago).

[tedster]

In another thread [webmasterworld.com] I just wrote about the way I understand Google's use of automated taxonomies, which then are used by their document classifier system. You could be describing an error in how the page is being classified, which would then affect what kinds of queries it can rank well for.

Of course, my ideas are quite theoretical - would love to hear from others.