Complex sentence: The national park is known internationally amongst conservationists for its biologically rich dense virgin rainforests, although the park includes a wide range of biotopes from lowland and mountain forests, to mangroves and savanna area which contribute to its unique ecosystem.
Split into simpler sentences: The national park is known internationally amongst conservationists for its biologically rich dense virgin rainforests. It is also characterized by a wide range of biotopes, from lowland and mountain forests, to mangroves and savanna area, which contribute to its unique ecosystem.