Blogs with multiple authors

[alakazam]

Some bloggers are aware that, due to various reasons, they cannot constantly come up with content, so they partner with other writers and create multiple-author blogs. This offers more frequent articles and, thus, more content for the search engines to index. However, the blog still has only one owner, and this raises the question of what happens if the bloggers have a fight and decide to stop their collaboration. Should each author copyright their articles before posting them on a blog with multiple authors?