our reporter bastian hartig was out and about in the krabi province in southern thailand, with a woman who has made the protection of mangroves her life's work. >> thousands of mangrove trees, a whole forest. on the coast of krabi province in southwestern thailand, nature has come back into its own. fish, crabs and other marine animals live in the water around the dense roots. and these macaques obviously feel great in the forests as well. the small island of koh klang is just a few kilometres away. but there's not a trace of dense greenery here. the habitat is largely destroyed. the mangroves had to make room for ponds like this. decades ago, they were set up all over the island to raise shrimp. back then, that was profitable. nowadays thailand's shrimp business is firmly in the hands of large farms on the mainland, so many of the ponds on the islands lie idle. and that's just where conservationist jaruwan enright sees an opportunity. she wants to transform the ponds bit by bit back into mangrove forests. the ground has to be neither too moist nor too dry, so sometimes a little help i