This webquest focuses on the important role of honeybees in pollination. The students will also investigate colony collapse disorder, and see the real life issues which can result from the removal of a keystone species from an ecosystem. The link to a jog with links to relevant articles and websites is included in the document, but any other articles could easily be subbed.
* I don't use this anymore, so I don't keep up with the links (that's why I made it free). Be sure to check them out before giving it to your students.