',located in......'

I am sorry about dragging the question about this one out but I can feel that my moment to be able to think the way native English speakers do is just a few days left for me once this one has been solved, but I know it is not possible. Anyway here is a sentence I would like to think about with you.

The Galapagos, located in South America's Pacific coast, attract many tourists, some of whom have caused various problems to its environment.

We can see these kinds of sentences a lot around us and I was wondering if 'which is' is omitted there or we should think of it as a participial construction? Or either one is fine and we should decide by contexts?
I hope to make my point and question clear and I really hope to hear from you again. Thank you so much.