Complex sentence: A site of special scientific interest, Annenkov is one of the few rat-free islands of the South Georgia archipelago, and as Bellinghausen lamented, there is "not a single shrub nor any vegetation" on the island.
Split into simpler sentences: A Site of Special Scientific Interest, Annenkov is one of the few rat-free islands of the South Georgia archipelago. And as Bellinghausen lamented there is "not a single shrub nor any vegetation" on the island.