Note: at this time of writing, june28/2012 the quest instructions are bugged. They lead you to beleive the place to search is in Lima outskirts. It's in Copiapo, see steps below.
1. Get the quest from Lima adventure mediator.
2. Speak with Famous Explorer in Lima.
3. Sail to Copiapo.
4. Speak with Bar Keeper.
5. Go to Northwest Copiapo, use observe to find the location to use ecological research.
Discovery: Chilean Rose Tarantula