Who is the villain of murder under the microscope 2011?

Answer 1

"Murder Under the Microscope" is an educational program conducted annually in Australia, highlighting an ecological change. A "villain" (cause) at a crime scene (ecosystem) is adversely affecting a "victim" (the affected species).

The answers are not revealed until the game ends, so answers before then would be "guesses" and are not permitted. The answer will be added at the conclusion of the challenge.

(see related questions)